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Sequence distribution and thermal properties of poly(butylene naphthalate terephthalate)

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Abstract

Poly(butylene naphthalate terephthalate) (PBNT) copolyesters were synthesized from bis(4-hydroxybutyl) terephthalate (BHBT) and bis(4-hydroxybutyl) naphthalate (BHBN) as starting materials. BHBT and BHBN were either homopolymerized or copolymerized at 260∼270 °C in the presence of titanium tetrabutoxide (TBT) as a catalyst to provide PBNT with various compositions. The copolyesters were characterized using inherent viscosity, X-ray, d.s.c., t.g.a. and 1H NMR. The composition and sequence distribution of the copolyesters was determined from 1H NMR spectra. The copolyesters exhibited a degree of randomness of about 1, indicating that the reactivity of BHBT and BHBN was almost the same. X-ray and d.s.c. showed PBNT copolyesters to be crystalline polymers. T.g.a. kinetics showed PBNT copolyesters to exhibit higher degradation activation energy, that is, better thermal stability, than PBTs.

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Authors and Affiliations

  1. Department of Chemical Engineering, National Cheng Kung University, Tainan, 70101, Taiwan, ROC

    Chun-Shan Wang & Ching-Hsuan Lin

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  1. Chun-Shan Wang
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  2. Ching-Hsuan Lin
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Wang, CS., Lin, CH. Sequence distribution and thermal properties of poly(butylene naphthalate terephthalate). J Polym Res 4, 139–145 (1997). https://doi.org/10.1007/s10965-006-0018-y

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  • DOI: https://doi.org/10.1007/s10965-006-0018-y

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