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Studies on physical properties and structure of silk. Glass transition and crystallization of silk fibroin
Author(s) -
Magoshi Jun,
Nakamura Shigeo
Publication year - 1975
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1975.070190410
Subject(s) - endothermic process , fibroin , differential scanning calorimetry , exothermic reaction , crystallization , glass transition , amorphous solid , materials science , silk , chemical engineering , polymer chemistry , composite material , thermodynamics , chemistry , crystallography , polymer , organic chemistry , adsorption , physics , engineering
Amorphous silk fibroin with random coil conformation shows endothermic and exothermic peaks and endothermic shift on the DSC (differential scanning calorimetry) curve. The endothermic shift observed at 175°C was due to the glass transition. The exothermic peak at 212°C is recognized to be the crystallization, which later was confirmed by x‐ray diffraction pattern. The endothermic peak at 280°C is shown to be the degradation.