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Study on thermal degradation of sol and gel of natural rubber
Author(s) -
Li SiDong,
Yu HePing,
Peng Zheng,
Zhu ChengShen,
Li PeiSen
Publication year - 2000
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/(sici)1097-4628(20000314)75:11<1339::aid-app3>3.0.co;2-0
Subject(s) - thermogravimetry , degradation (telecommunications) , fourier transform infrared spectroscopy , thermal stability , thermal analysis , materials science , exothermic reaction , natural rubber , differential thermal analysis , chemistry , thermal , chemical engineering , polymer chemistry , composite material , organic chemistry , inorganic chemistry , thermodynamics , engineering , telecommunications , physics , optics , computer science , diffraction
The thermal degradation of natural rubber (NR) in air at a constant heating rate was studied by using of the thermogravimetry (TG) and thermogravimetry and differential thermal analysis (TG–DTA) simultaneous techniques. It indicates that the temperature of thermal degradation of gel and sol of NR rises linearly along with the increment of the heating rate, whereas the heating rate has little effect on the degree of thermal degradation. Accompanying other side reactions, the thermal degradation of NR is not a simple random chain scission process, and it is an exothermic reaction. The dynamic variation of molecular structure of NR during the thermal degradation was studied using Fourier transform infrared spectroscopy (FTIR). It shows that the products of the thermal degradation of both sol and gel of NR are hydroperoxide, carbonyl, and hydroxyl compounds. The formation of gel makes the temperature of the thermal degradation of NR decrease and the rate of the thermal degradation increase; thus, the thermal stability of NR is reduced. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 1339–1344, 2000