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Copolyesters. IV. Copolyesters of polycaprolactone and poly(butylene terephthalate)
Author(s) -
Tsai HongBing,
Kuo WenFaa,
Chen MeiSui,
Chang NienShi,
Chen ShuMei,
Chang ShinnJen
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.1990.070390203
Subject(s) - polycaprolactone , crystallinity , materials science , caprolactone , copolymer , ultimate tensile strength , polymer chemistry , condensation polymer , polyester , modulus , composite material , polymer
The copolyesters of poly(butylene terephthalate) and polycaprolactone were prepared by melt polycondensation. The charged form of the caprolactone unit was either caprolactone or polycaprolactonediol. The chemical structure of the copolyesters was investigated by proton NMR. It was found that the content of the caprolactone unit in copolyesters was lower than the charged value. The copolyesters prepared from both caprolactone and polycaprolactonediol were found to be random copolymers. T m , T g , and crystallinity of the copolyesters decreased as the content of caprolactone unit increased due to the copolymerization effect. The tensile strength, modulus, and hardness decreased as the content of caprolactone unit increased, which was consistent with the trend of crystallinity.