COMPOSITIONAL HETEROGENEITY OF ETHYLENE OXIDE-BUTYLENE TEREPHTHALATE SEGMENTED COPOLYMER* |
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Authors: | De-zhu Ma Dong-sheng Li Ming-chuan Zhao Mo-zhen Wang Ran Ye Xiao-lie Luo |
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Affiliation: | Department of Polymer Science and Engineering; University of Science and Technology of China; Hefei 230026; China |
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Abstract: | A series of ethylene oxide-butylene terephthalate (EOBT) segmented copolymers with differentsoft segment length and hard segment content were synthesized. The compositional heterogeneity was studiedby solvent extraction. The results show that the compositional heterogeneity increases when soft segmentlength and hard segment content increase. The compositional heterogeneity is also reflected in thecrystallization behavior and morphology of soft and hard segment in EOBT segmented copolymer. The morecompositional heterogeneous the EOBT segmented copolymer is, the more different the morphology and thecrystallization behavior between separated fractions. Compared with ethylene oxide-ethylene terephthalate(EOET) segmented copolymer, compositional heterogeneity in EOBT segmented copolymer is weaker. Butthe compositional heterogeneity in EOBT segmented copolymer with long soft segment and high hardsegment content is still obvious. |
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Keywords: | Ethylene oxide-butylene terephthalate Segmented copolymer Compositional heterogeneity Crystallizability Morphology |
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