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Effects of different silane coupling agents on structure and properties of starch–chitosan–kaolin composites
Author(s) -
Zhang Zhijian,
Ge Xin,
Xing Ruiguang,
Zhang Bangwen
Publication year - 2019
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.48050
Subject(s) - thermogravimetric analysis , materials science , chitosan , crystallinity , composite material , differential scanning calorimetry , ultimate tensile strength , composite number , starch , glass transition , silane , elongation , chemical engineering , polymer , chemistry , organic chemistry , physics , engineering , thermodynamics
ABSTRACT Effects of different silane coupling agents on clay surface modification were studied. Herein, functionalized superfine kaolin was compounded with starch–chitosan (SCS) to prepare starch–chitosan‐functionalized superfine kaolin composite. The characterization results showed that kaolin (K) was successfully modified; the composite formed a dense intercalated structure. The glass‐transition temperature ( T g ) was measured by differential scanning calorimetry and dynamic mechanical analysis. It decreased by 60 °C which attested the crystallinity of SCS. The results of thermogravimetric analysis showed that the fastest weight‐loss temperature ( T max ) was elevated by over 50 °C for composites. Mechanical properties of the composites were explored by electronic universal testing machine. Tensile strength and elongation of composites were improved by 4.7 and 10.9 times. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48050.