Glyco Property List
Pooled literature properties (glycanDB). Optional filters: ?dataset=uv_vis&property_key=...
GET /api/gdd/glyco-properties/?format=api&page=30
{ "count": 839, "next": "http://glycodata.org/api/gdd/glyco-properties/?format=api&page=31", "previous": "http://glycodata.org/api/gdd/glyco-properties/?format=api&page=29", "results": [ { "id": 581, "dataset": "cellulose", "entity": "carboxymethyl cellulose", "entity_group": "carboxymethyl cellulose (CMC)", "entity_class": "cellulose derivative", "property": "glass transition temperature", "property_key": "Tg", "value": "185.65", "unit": "C", "value_reported": "185.65", "unit_reported": "C", "method": "Experiment", "method_detail": "DSC; solution-cast CMC film (CMC from oil palm empty fruit bunch); minor endotherm ~100 C from moisture removal noted", "conditions": "DSC; solution-cast CMC film (CMC from oil palm empty fruit bunch); minor endotherm ~100 C from moisture removal noted", "conditions_detail": "DSC; solution-cast CMC film (CMC from oil palm empty fruit bunch); minor endotherm ~100 C from moisture removal noted | test state: film, conditioned 23 C / 50% RH", "doi": "10.30574/gscbps.2023.24.3.0386", "source_url": "https://gsconlinepress.com/journals/gscbps/sites/default/files/GSCBPS-2023-0386.pdf", "year": "2023", "confidence": "high", "comments": "\"Sample ... CMC ... Tg (Degree Celsius) 185.65 ... Tm (Degree Celsius) 338\" — Pure CMC film (Table 4). Hygroscopic: minor endothermic moisture-removal peak ~100 C; films conditioned at 50% RH so some bound water present. [Hoque M, Hossain MS, Hasan MN, Jubayer A, Aktaruzzaman M, 2023, confidence: high]" }, { "id": 582, "dataset": "cellulose", "entity": "carboxymethyl cellulose", "entity_group": "carboxymethyl cellulose (CMC)", "entity_class": "cellulose derivative", "property": "glass transition temperature", "property_key": "Tg", "value": "131.1", "unit": "C", "value_reported": "131.1", "unit_reported": "C", "method": "Experiment", "method_detail": "DSC; hemicellulose-loaded CMC (H-CMC-B) film", "conditions": "DSC; hemicellulose-loaded CMC (H-CMC-B) film", "conditions_detail": "DSC; hemicellulose-loaded CMC (H-CMC-B) film | test state: film (H-CMC blend, ~30 wt% hemicellulose)", "doi": "10.30574/gscbps.2023.24.3.0386", "source_url": "https://gsconlinepress.com/journals/gscbps/sites/default/files/GSCBPS-2023-0386.pdf", "year": "2023", "confidence": "medium", "comments": "\"Sample ... H-CMC-B ... Tg (Degree Celsius) 131.1 ... Tm (Degree Celsius) 336\" — CMC blended with hemicellulose (H-CMC-B). Blend, not pure CMC; separate condition. Tg of H-CMC films reported 133-187 C across the series. [Hoque M, Hossain MS, Hasan MN, Jubayer A, Aktaruzzaman M, 2023, confidence: medium]" }, { "id": 583, "dataset": "cellulose", "entity": "hydroxyethyl cellulose", "entity_group": "methyl/hydroxypropyl cellulose", "entity_class": "cellulose derivative", "property": "glass transition temperature", "property_key": "Tg", "value": "137.0", "unit": "C", "value_reported": "137", "unit_reported": "C", "method": "Experiment", "method_detail": "DSC; temperature program -70 to 150 C (pure HEC component, Tg1)", "conditions": "DSC; temperature program -70 to 150 C (pure HEC component, Tg1)", "conditions_detail": "DSC; temperature program -70 to 150 C (pure HEC component, Tg1) | test state: film/biocomposite component", "doi": "10.1038/s41598-025-23615-6", "source_url": "https://www.nature.com/articles/s41598-025-23615-6", "year": "2025", "confidence": "high", "comments": "\"Tg1 = 137 °C) and ENR (Tg2 = -50 °C)\" — Pure HEC glass transition (Tg1) reported in DSC of HEC/epoxidized-natural-rubber biocomposites. [Bourassi L, et al., 2025, confidence: high]" }, { "id": 584, "dataset": "cellulose", "entity": "carboxymethyl cellulose acetate butyrate", "entity_group": "cellulose acetate", "entity_class": "cellulose derivative", "property": "glass transition temperature", "property_key": "Tg", "value": "138.35", "unit": "C", "value_reported": "138.35", "unit_reported": "C", "method": "Experiment", "method_detail": "DSC; heated to 600 C at 10 C/min in nitrogen; single Tg", "conditions": "DSC; heated to 600 C at 10 C/min in nitrogen; single Tg", "conditions_detail": "DSC; heated to 600 C at 10 C/min in nitrogen; single Tg | heating rate (K/min): 10 | test state: dry (glassy thermoplastic) | DS: 0.45", "doi": "10.35812/CelluloseChemTechnol.2019.53.66", "source_url": "https://www.cellulosechemtechnol.ro/pdf/CCT7-8(2019)/p.667-675.pdf", "year": "2019", "confidence": "high", "comments": "\"The DSC curves showed that CMCAB is a glassy thermoplastic cellulose derivative, with a glass transition temperature (Tg) of 138.35 °C.\" — CMCAB is a mixed ester of CMC (ester derivative). DS of carboxymethyl 0.45. From sugarcane bagasse cellulose. Initial moisture-loss endotherm at 46.2 C (hygroscopic). [El-Sakhawy M, Tohamy HS, Salama A, Kamel S, 2019, confidence: high]" }, { "id": 585, "dataset": "cellulose", "entity": "dialcohol cellulose", "entity_group": "regenerated cellulose (other)", "entity_class": "cellulose derivative", "property": "glass transition temperature", "property_key": "Tg", "value": "66.0", "unit": "C", "value_reported": "23-109", "unit_reported": "C", "method": "Experiment", "method_detail": "DSC after pre-drying step; series of dialcohol celluloses from periodate-oxidized/borohydride-reduced softwood kraft pulp; Tg depends on initial degree of oxidation (DO 8-80%); Mw > 30 kDa", "conditions": "DSC after pre-drying step; series of dialcohol celluloses from periodate-oxidized/borohydride-reduced softwood kraft pulp; Tg depends on initial degree of oxidation (DO 8-80%); Mw > 30 kDa", "conditions_detail": "DSC after pre-drying step; series of dialcohol celluloses from periodate-oxidized/borohydride-reduced softwood kraft pulp; Tg depends on initial degree of oxidation (DO 8-80%); Mw > 30 kDa | test state: dry | water (wt%): 0", "doi": "10.1002/cssc.202300791", "source_url": "https://doi.org/10.1002/cssc.202300791", "year": "2023", "confidence": "high", "comments": "\"the Tg of dialcohol cellulose is highly dependent on the initial DO of DAC, with Tg values ranging from 23 to 109 °C\" — Range across degree-of-oxidation series (DO 8-80%). DSC done after a pre-drying step to remove plasticizing residual water (water lowers Tg). Below DO ~26% no glassy Tg observed (too crystalline). [Simon J, Schlapp-Hackl I, Sapkota J, et al., 2023, confidence: high]" }, { "id": 586, "dataset": "cellulose", "entity": "dialcohol cellulose", "entity_group": "regenerated cellulose (other)", "entity_class": "cellulose derivative", "property": "glass transition temperature", "property_key": "Tg", "value": "94.0", "unit": "C", "value_reported": "94", "unit_reported": "C", "method": "Experiment", "method_detail": "DSC after pre-drying; dialcohol cellulose with initial degree of oxidation 39%, before cryo-milling", "conditions": "DSC after pre-drying; dialcohol cellulose with initial degree of oxidation 39%, before cryo-milling", "conditions_detail": "DSC after pre-drying; dialcohol cellulose with initial degree of oxidation 39%, before cryo-milling | test state: dry | water (wt%): 0", "doi": "10.1002/cssc.202300791", "source_url": "https://doi.org/10.1002/cssc.202300791", "year": "2023", "confidence": "high", "comments": "\"The glass transition temperature (Tg) decreased significantly from 94 to 42 °C as a consequence of the milling.\" — DO 39% dialcohol cellulose, unmilled. Cryo-milling lowered Tg to 42 C (molecular-weight reduction); the 42 C value is a separate row. [Simon J, Schlapp-Hackl I, Sapkota J, et al., 2023, confidence: high]" }, { "id": 587, "dataset": "cellulose", "entity": "dialcohol cellulose", "entity_group": "regenerated cellulose (other)", "entity_class": "cellulose derivative", "property": "glass transition temperature", "property_key": "Tg", "value": "42.0", "unit": "C", "value_reported": "42", "unit_reported": "C", "method": "Experiment", "method_detail": "DSC after pre-drying; dialcohol cellulose (initial DO 39%) after 2 h cryo-milling (reduced Mw)", "conditions": "DSC after pre-drying; dialcohol cellulose (initial DO 39%) after 2 h cryo-milling (reduced Mw)", "conditions_detail": "DSC after pre-drying; dialcohol cellulose (initial DO 39%) after 2 h cryo-milling (reduced Mw) | test state: dry | water (wt%): 0", "doi": "10.1002/cssc.202300791", "source_url": "https://doi.org/10.1002/cssc.202300791", "year": "2023", "confidence": "high", "comments": "\"The glass transition temperature (Tg) decreased significantly from 94 to 42 °C as a consequence of the milling.\" — DO 39% dialcohol cellulose after 2 h cryo-milling; Tg drop attributed to molecular-weight reduction. [Simon J, Schlapp-Hackl I, Sapkota J, et al., 2023, confidence: high]" }, { "id": 588, "dataset": "cellulose", "entity": "cellulose (amorphous, native/non-crystalline domains)", "entity_group": "cellulose (generic)", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "221.85", "unit": "C", "value_reported": "490-500", "unit_reported": "K", "method": "Review", "method_detail": "primary alpha1 glass transition; indirect methods (extrapolation of plasticized-sample Tg to zero plasticizer; DP extrapolation; Tg/Tm=0.66 rule)", "conditions": "primary alpha1 glass transition; indirect methods (extrapolation of plasticized-sample Tg to zero plasticizer; DP extrapolation; Tg/Tm=0.66 rule)", "conditions_detail": "primary alpha1 glass transition; indirect methods (extrapolation of plasticized-sample Tg to zero plasticizer; DP extrapolation; Tg/Tm=0.66 rule) | test state: dry | water (wt%): 0", "doi": "10.30958/ajs.3-4-4", "source_url": "https://www.athensjournals.gr/sciences/2016-3-4-4-Ioelovich.pdf", "year": "2016", "confidence": "low", "comments": "\"the following primary glass temperature of cellulose was obtained: Tg1 ~ 490-500 K (Table 1).\" — Estimate/extrapolation; direct measurement impossible because cellulose thermally decomposes before Tg1. Primary alpha1 transition of dry cellulose. [Ioelovich M, 2016, confidence: low]" }, { "id": 589, "dataset": "cellulose", "entity": "cellulose (amorphous, non-crystalline domains)", "entity_group": "cellulose (generic)", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "126.85", "unit": "C", "value_reported": "390-410", "unit_reported": "K", "method": "Review", "method_detail": "secondary alpha2 glass transition; dynamic methods, dilatometry, thermomechanics, calorimetry", "conditions": "secondary alpha2 glass transition; dynamic methods, dilatometry, thermomechanics, calorimetry", "conditions_detail": "secondary alpha2 glass transition; dynamic methods, dilatometry, thermomechanics, calorimetry | test state: dry | water (wt%): 0", "doi": "10.30958/ajs.3-4-4", "source_url": "https://www.athensjournals.gr/sciences/2016-3-4-4-Ioelovich.pdf", "year": "2016", "confidence": "medium", "comments": "\"Below Tg1, at the temperatures 390-410 K, the alpha2-relaxation transition was discovered by various experimental methods ... most researchers attribute this transition to a secondary glass transition\" — Secondary (alpha2) glass transition of dry cellulose, 390-410 K; observed experimentally for dry samples by several methods. [Ioelovich M, 2016, confidence: medium]" }, { "id": 590, "dataset": "cellulose", "entity": "cellulose (amorphous)", "entity_group": "cellulose (generic)", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "134.85", "unit": "C", "value_reported": "408", "unit_reported": "K", "method": "Model", "method_detail": "Tg of dry cellulose back-calculated from experimental Tg of wet samples via inverse-mixing (Fox-type) equation using Tg,water=136 K; averaged over W_NCD=0.1-0.35", "conditions": "Tg of dry cellulose back-calculated from experimental Tg of wet samples via inverse-mixing (Fox-type) equation using Tg,water=136 K; averaged over W_NCD=0.1-0.35", "conditions_detail": "Tg of dry cellulose back-calculated from experimental Tg of wet samples via inverse-mixing (Fox-type) equation using Tg,water=136 K; averaged over W_NCD=0.1-0.35 | test state: dry | water (wt%): 0", "doi": "10.30958/ajs.3-4-4", "source_url": "https://www.athensjournals.gr/sciences/2016-3-4-4-Ioelovich.pdf", "year": "2016", "confidence": "low", "comments": "\"The calculations showed that the real Tg,c of dry cellulose is about 408 K, i.e. it is the temperature of secondary alpha2 glass transition of dry cellulose (Table 3).\" — Calculated (not directly measured) dry-cellulose Tg ~408 K, derived from wet-sample data; identified with the alpha2 transition. Cellulose degrades before direct Tg measurement. [Ioelovich M, 2016, confidence: low]" }, { "id": 591, "dataset": "cellulose", "entity": "cellulose (amorphous)", "entity_group": "cellulose (generic)", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "219.85", "unit": "C", "value_reported": "493", "unit_reported": "K", "method": "Model", "method_detail": "Tg of dry amorphous cellulose assumed/used in Kaelbe, Couchman and Fox plasticization equations (water Tg=136 K) to fit wet-sample data", "conditions": "Tg of dry amorphous cellulose assumed/used in Kaelbe, Couchman and Fox plasticization equations (water Tg=136 K) to fit wet-sample data", "conditions_detail": "Tg of dry amorphous cellulose assumed/used in Kaelbe, Couchman and Fox plasticization equations (water Tg=136 K) to fit wet-sample data | test state: dry | water (wt%): 0", "doi": "10.30958/ajs.3-4-4", "source_url": "https://www.athensjournals.gr/sciences/2016-3-4-4-Ioelovich.pdf", "year": "2016", "confidence": "low", "comments": "\"assuming that the glass transition temperature of dry polymer is 493 K and for the water is 136 K (Figure 7).\" — 493 K is the assumed dry-cellulose Tg (primary alpha1) used in mixing-rule models; estimate consistent with 490-500 K range, not a direct measurement. [Ioelovich M, 2016, confidence: low]" }, { "id": 592, "dataset": "cellulose", "entity": "cellulose (dry, primary alpha1 transition)", "entity_group": "cellulose (generic)", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "225.0", "unit": "C", "value_reported": "220-230", "unit_reported": "C", "method": "Review", "method_detail": "stated primary alpha1 glass transition of dry cellulose; contrasted with measured wet-sample Tg (-50 to 80 C)", "conditions": "stated primary alpha1 glass transition of dry cellulose; contrasted with measured wet-sample Tg (-50 to 80 C)", "conditions_detail": "stated primary alpha1 glass transition of dry cellulose; contrasted with measured wet-sample Tg (-50 to 80 C) | test state: dry | water (wt%): 0", "doi": "10.30958/ajs.3-4-4", "source_url": "https://www.athensjournals.gr/sciences/2016-3-4-4-Ioelovich.pdf", "year": "2016", "confidence": "low", "comments": "\"all the experimental Tg are obtained in the temperature range -50 to 80°C (223-353 K), i.e. far off 220-230°C (493-503 K), attributed to the temperature of primary alpha1 glass transition of dry cellulose.\" — Primary dry-cellulose Tg ~220-230 C (493-503 K, estimate); measured wet-sample Tg fall in -50 to 80 C depending on hydration. [Ioelovich M, 2016, confidence: low]" }, { "id": 593, "dataset": "cellulose", "entity": "cellulose (ball-milled amorphous)", "entity_group": "cellulose (generic)", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "204.85", "unit": "C", "value_reported": "478", "unit_reported": "K", "method": "Model", "method_detail": "DMA pocket technique; Tg vs water content fitted to Couchman-Karasz relationship and extrapolated to dry (0% water)", "conditions": "DMA pocket technique; Tg vs water content fitted to Couchman-Karasz relationship and extrapolated to dry (0% water)", "conditions_detail": "DMA pocket technique; Tg vs water content fitted to Couchman-Karasz relationship and extrapolated to dry (0% water) | test state: dry | water (wt%): 0", "doi": "10.1007/s10570-010-9425-7", "source_url": "https://doi.org/10.1007/s10570-010-9425-7", "year": "2010", "confidence": "medium", "comments": "\"Fitting the data to a Couchman-Karasz relationship predicted a value for Tg of the dry cellulose of approximately 478 K, which was similar to values previously reported for other dry polysaccharides.\" — Dry-cellulose Tg (~478 K) extrapolated from water-plasticized DMA data (water range 5-42% db); no clear calorimetric Tg observable directly. Pulp = eucalyptus/softwood, ball-milled (amorphized). [Paes SS, Sun S, MacNaughtan W, Ibbett R, Ganster J, Foster TJ, Mitchell JR, 2010, confidence: medium]" }, { "id": 594, "dataset": "cellulose", "entity": "cellulose (amorphous region, isolated)", "entity_group": "cellulose (generic)", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "225.0", "unit": "C", "value_reported": "200-250", "unit_reported": "C", "method": "Review", "method_detail": "dry amorphous-cellulose glass transition range citing Back & Salmen 1982; DMA/thermal softening of wood components", "conditions": "dry amorphous-cellulose glass transition range citing Back & Salmen 1982; DMA/thermal softening of wood components", "conditions_detail": "dry amorphous-cellulose glass transition range citing Back & Salmen 1982; DMA/thermal softening of wood components | test state: dry | water (wt%): 0", "doi": "10.15376/biores.6.2.2125-2134", "source_url": "https://doi.org/10.15376/biores.6.2.2125-2134", "year": "2011", "confidence": "medium", "comments": "\"When dry, the differences in glass transition temperature are not huge: 200 to 250 °C for the amorphous region of cellulose ... At the water-saturated condition, the Tg of isolated amorphous cellulose and of hemicelluloses decrease to subambient temperatures (Back and Salmén 1982).\" — Canonical dry amorphous-cellulose Tg range 200-250 C (Back & Salmen 1982); at water saturation Tg drops to subambient. Compilation/secondary citation. [Horvath B, Peralta PN, Frazier CE, Peszlen I, 2011, confidence: medium]" }, { "id": 595, "dataset": "cellulose", "entity": "cellulose (amorphous region of paper)", "entity_group": "cellulose (generic)", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "200.0", "unit": "C", "value_reported": "200", "unit_reported": "C", "method": "Review", "method_detail": "alpha relaxation = glass transition of amorphous cellulose regions; dynamic mechanical, peak ~200 C at 1 Hz; activation energy >100 kcal/mol; strongly plasticized by water", "conditions": "alpha relaxation = glass transition of amorphous cellulose regions; dynamic mechanical, peak ~200 C at 1 Hz; activation energy >100 kcal/mol; strongly plasticized by water", "conditions_detail": "alpha relaxation = glass transition of amorphous cellulose regions; dynamic mechanical, peak ~200 C at 1 Hz; activation energy >100 kcal/mol; strongly plasticized by water | test state: dry | water (wt%): 0", "doi": "10.15376/frc.1993.1.1", "source_url": "https://doi.org/10.15376/frc.1993.1.1", "year": "1993", "confidence": "medium", "comments": "\"The third transition is the alpha relaxation. This is the glass transition in the amorphous regions of the cellulose. The activation energy is large (over 100 kcal/mol), and the peak of the relaxation would be at about 200°C at 1 Hz. It is very easily plasticized by water.\" — Glass (alpha) transition of dry amorphous cellulose ~200 C at 1 Hz; review. Easily plasticized (lowered) by water. [Baum GA, 1993, confidence: medium]" }, { "id": 596, "dataset": "cellulose", "entity": "cellulose (amorphous)", "entity_group": "cellulose (generic)", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "62.85", "unit": "C", "value_reported": "336", "unit_reported": "K", "method": "Simulation (MD)", "method_detail": "NPT-MD, ReaxFF reactive force field; Tg from intersection of two linear fits of specific volume vs temperature over 250-450 K; dry, no water", "conditions": "NPT-MD, ReaxFF reactive force field; Tg from intersection of two linear fits of specific volume vs temperature over 250-450 K; dry, no water", "conditions_detail": "NPT-MD, ReaxFF reactive force field; Tg from intersection of two linear fits of specific volume vs temperature over 250-450 K; dry, no water | test state: dry | water (wt%): 0", "doi": "10.4028/www.scientific.net/AMM.214.7", "source_url": "https://doi.org/10.4028/www.scientific.net/AMM.214.7", "year": "2012", "confidence": "medium", "comments": "\"The intersection of the two linear trend lines fitted to the ends of the data gives an estimate of the glass transition temperature. The calculated values 336 K are closer to those calculated by other groups using molecular dynamics simulations with different force field\" — MD (ReaxFF) Tg = 336 K for dry amorphous cellulose. Authors note MD nanosecond cooling rates tend to overestimate Tg vs DSC. Simulation, not experimental. [Zhang XM, Tschopp MA, Shi SQ, Cao J, 2012, confidence: medium]" }, { "id": 597, "dataset": "cellulose", "entity": "cellulose (amorphous)", "entity_group": "cellulose (generic)", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "150.85", "unit": "C", "value_reported": "424", "unit_reported": "K", "method": "Simulation (MD)", "method_detail": "MD with COMPASS force field; Tg from specific-volume/temperature; dry (0% water). Also 432/496/422/381 K at 2/4/6/8 wt% water", "conditions": "MD with COMPASS force field; Tg from specific-volume/temperature; dry (0% water). Also 432/496/422/381 K at 2/4/6/8 wt% water", "conditions_detail": "MD with COMPASS force field; Tg from specific-volume/temperature; dry (0% water). Also 432/496/422/381 K at 2/4/6/8 wt% water | test state: dry | water (wt%): 0", "doi": "10.1088/2053-1591/acaa8c", "source_url": "https://doi.org/10.1088/2053-1591/acaa8c", "year": "2022", "confidence": "medium", "comments": "\"when the water content was 0%, 2%, 4%, 6%, and 8%, the glass transition temperature values of the simulated system were 424, 432, 496, 422, and 381 K\" — MD (COMPASS). Dry (0% water) Tg = 424 K; non-monotonic with water (peak 496 K at 4%). Simulation, not experimental. [Jiang K, Yan Z, Fang W, Zhang Y, 2022, confidence: medium]" }, { "id": 598, "dataset": "cellulose", "entity": "cotton cellulose fiber", "entity_group": "cotton", "entity_class": "native cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "190.0", "unit": "C", "value_reported": "160-220", "unit_reported": "C", "method": "Experiment", "method_detail": "Glass transition inferred from temperature dependence of single-fiber tenacity distribution (finite mixture / mixed Weibull model), supported by XRD and TGA", "conditions": "Glass transition inferred from temperature dependence of single-fiber tenacity distribution (finite mixture / mixed Weibull model), supported by XRD and TGA", "conditions_detail": "Glass transition inferred from temperature dependence of single-fiber tenacity distribution (finite mixture / mixed Weibull model), supported by XRD and TGA | test state: cotton fiber (semicrystalline cellulose)", "doi": "10.1021/acssuschemeng.7b04919", "source_url": "https://doi.org/10.1021/acssuschemeng.7b04919", "year": "2018", "confidence": "medium", "comments": "\"cotton fiber underwent the following sequence of transitions: glass transition at 160-220 °C, dehydration at 240-260 °C, and chain scission at 280-300 °C.\" — Native cotton cellulose fiber; Tg range inferred from mechanical (tenacity) transition modeling, not direct calorimetry. Dehydration occurs at higher T (240-260 C). [Nam S, Alhassan D, Condon B, et al., 2018, confidence: medium]" }, { "id": 599, "dataset": "cellulose", "entity": "regenerated cellulose fiber (viscose rayon)", "entity_group": "viscose/rayon", "entity_class": "regenerated cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "278.85", "unit": "C", "value_reported": "552", "unit_reported": "K", "method": "Experiment", "method_detail": "DMA; Tg of dry fiber from tan delta; water plasticizes Tg to room temperature at water regain ~78%", "conditions": "DMA; Tg of dry fiber from tan delta; water plasticizes Tg to room temperature at water regain ~78%", "conditions_detail": "DMA; Tg of dry fiber from tan delta; water plasticizes Tg to room temperature at water regain ~78% | test state: dry | water (wt%): 0", "doi": "10.1016/j.carbpol.2019.115663", "source_url": "https://doi.org/10.1016/j.carbpol.2019.115663", "year": "2020", "confidence": "medium", "comments": "\"The glass transition temperature (Tg) of dry regenerated cellulose is 552 K for rayon, 523 K for cupra, and 513 K for lyocell, which decreases to room temperature by water\" — Dry viscose rayon Tg = 552 K (DMA). Water strong plasticizer: Tg falls to room temperature at ~78% water regain. Cellulose II. [Okugawa A, Sakaino M, Yuguchi Y, et al., 2020, confidence: medium]" }, { "id": 600, "dataset": "cellulose", "entity": "regenerated cellulose fiber (cupra / cuprammonium)", "entity_group": "viscose/rayon", "entity_class": "regenerated cellulose", "property": "glass transition temperature", "property_key": "Tg", "value": "249.85", "unit": "C", "value_reported": "523", "unit_reported": "K", "method": "Experiment", "method_detail": "DMA; Tg of dry fiber from tan delta; water plasticizes Tg to room temperature at water regain ~63%", "conditions": "DMA; Tg of dry fiber from tan delta; water plasticizes Tg to room temperature at water regain ~63%", "conditions_detail": "DMA; Tg of dry fiber from tan delta; water plasticizes Tg to room temperature at water regain ~63% | test state: dry | water (wt%): 0", "doi": "10.1016/j.carbpol.2019.115663", "source_url": "https://doi.org/10.1016/j.carbpol.2019.115663", "year": "2020", "confidence": "medium", "comments": "\"The glass transition temperature (Tg) of dry regenerated cellulose is 552 K for rayon, 523 K for cupra, and 513 K for lyocell\" — Dry cuprammonium (cupra) regenerated cellulose Tg = 523 K (DMA). Tg falls to room temperature at ~63% water regain. Cellulose II. [Okugawa A, Sakaino M, Yuguchi Y, et al., 2020, confidence: medium]" } ] }