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Copolyesters. III. Thermal degradation of poly(butylene terephthalate‐co‐adipate)s
Author(s) -
Chang ShinnJen,
Chen MeiSui,
Chang R. S.,
Chen ShuMei,
Tsai HongBing
Publication year - 1990
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.1990.070390202
Subject(s) - adipate , terephthalic acid , adipic acid , materials science , thermal stability , degradation (telecommunications) , condensation polymer , polymer chemistry , polyester , chemical engineering , polybutylene succinate , embrittlement , nuclear chemistry , composite material , chemistry , polymer , telecommunications , computer science , engineering
The copolyesters of poly(butylene terephthalate) and poly(butylene adipate) were prepared by melt polycondensation of 1,4‐butanediol, terephthalic acid, and adipic acid. The thermal stability was important for their use a shot melt adhesives. The thermal degradation of these copolysters and homopolyesters was determined through TGA, change of acid number, IR, GPC, and NMR analyses. It was found that the thermal stability of the copolysters in oxygen decreased as the content of butylene adipate increased at temperature above and below T m . Thermal degradation occured in oxygen even at temperature lower than T m , so that degradation would also occur at room temperature in air and embrittlement was found for these copolysters for long term service.