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Synthesis and characterization of poly[(butylene succinate)‐ co ‐(butylene terephthalate)]‐ b ‐poly(tetramethylene glycol) segmented block copolymer
Author(s) -
Park Young H.,
Cho Chang G.
Publication year - 2001
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 - 10.1002/1097-4628(20010314)79:11<2067::aid-app1016>3.0.co;2-4
Subject(s) - copolymer , crystallinity , materials science , polyester , polymer chemistry , melting point , morphology (biology) , composite material , polymer , genetics , biology
Polyester‐polyether segmented block copolymers of poly[(butylene succinate)‐ co ‐poly(butylene terephthalate)] (PBS–PBT) and poly(tetramethylene glycol) (PTMG) ( M n = 2000) with various compositions were synthesized. PBT content in the PBS was adjusted to ca. 5 mol %. Their thermal and mechanical properties were investigated. In the case of copolymer, the melting point of the PBS–PBT control was 107.8°C, and the melting point of the copolymer containing 70 wt % of PTMG was 70.1°C. Crystallinity of soft segment was 5 ∼ 17%, and that of hard segment was 42 ∼ 59%. The breaking stress of the PBS–PTMG control was 47 MPa but it decreased with increasing PTMG content. In the case of copolymer containing 70 wt % of PTMG, breaking stress was 36 MPa. Contrary to the decreasing breaking stress, breaking strain increased from 300% for PBS–PBT control to 900% for a copolymer containing 70 wt % of PTMG. The shape recovery ratios of the copolymer containing 70 wt % PTMG were almost twice of those of copolymers containing 40 wt % PTMG. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 79: 2067–2075, 2001