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Miscibility behaviors in poly(butylene terephthalate)/polyarylates based on Bisphenol A copolymer blends

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Abstract

The miscibility and spherulitic growth rates of Poly(butylene terephthalate) with Polyarylate based copolymer blends, PBT/PAr, were investigated using differential scanning calorimetry (DSC) and polarized optical microscopy (POM). Five kinds of polyarylate copolymers based on Bisphenol A with different molar ratios of isophthalic/terephthalic acids were prepared via. interfacial polymerization. The mean field theory of polymer/copolymer blend system was introduced to explain the miscibility behaviors; this theory could predict miscibility in PBT/PAr blends qualitatively. It was found that the segmental interaction strength of PAr with PBT followed the order of PAr(T-100) > PAr(I-100) > PAr(I25-T75) > PAr(I75-T25) > PAr(I50-T50). The physical origin of this phenomenon is very complex. One of possible reasons for these behaviors may arise from the conformations of PAr(T-100) and PAr(I-100) segments. The preferred conformation of PAr(T-100) was crank-shaft and the preferred conformation of PAr(I-100) was helix type. However, the conformation of PBT in crystalline state was nearly linear. It was also shown that the segmental interaction strength of the blend influenced the spherulitic growth rate.

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Authors and Affiliations

  1. Institute of Materials Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan, ROC

    W. B. Liau

  2. Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1 EW, UK

    A. S. Liu

Authors
  1. W. B. Liau
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  2. A. S. Liu
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  3. W. Y. Chiu
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Correspondence to W. B. Liau.

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Liau, W.B., Liu, A.S. & Chiu, W.Y. Miscibility behaviors in poly(butylene terephthalate)/polyarylates based on Bisphenol A copolymer blends. J Polym Res 6, 27–33 (1999). https://doi.org/10.1007/s10965-006-0068-1

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  • DOI: https://doi.org/10.1007/s10965-006-0068-1

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