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Isothermal crystallization kinetics and melting behaviors of poly(butylene terephthalate) and poly(butylene terephthalate‐ co ‐fumarate) copolymer
Author(s) -
Xiao Xiaoling,
Zeng Zuoxiang,
Xue Weilan,
Kong Qingjuan,
Zhu Wanyu
Publication year - 2013
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23287
Subject(s) - materials science , crystallization , avrami equation , differential scanning calorimetry , copolymer , nucleation , polymer chemistry , terephthalic acid , polymer , isothermal process , kinetics , chemical engineering , melting point , crystallization of polymers , thermodynamics , polyester , composite material , physics , quantum mechanics , engineering
The isothermal crystallization kinetics and melting behaviors after isothermal crystallization of poly(butylene terephthalate) (PBT) and poly(butylene terephthalate‐ co ‐fumarate) (PBTF) containing 95/5, 90/10, and 80/20 molar ratios of terephthalic acid/fumaric acid were investigated by differential scanning calorimetry. The equilibrium melting temperatures of these polymers were estimated by Hoffman–Weeks equation. So far as the crystallization kinetics was concerned, the Avrami equation was applied and the values of the exponent n for all these polymers are in the range of 2.50–2.96, indicating that the addition of fumarate does not affect the geometric dimension of PBT crystal growth. Crystallization activation energy (Δ E ) and nucleation constant ( K g ) of PBTF copolymers are higher than that of PBT homopolymer, suggesting that the introduction of fumarate hinders the crystallization of PBT in PBTF. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers