Chem. J. Chinese Universities ›› 2006, Vol. 27 ›› Issue (2): 360.

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Synthesis and Characterization of Biodegradable Poly(butylene succinate-co-butylene methyl succinate)

 SUN Yuan-Bi,  Xu-Jun,  Xu-Yong-Xiang,  Yan-Li-Tang,  Guo-Bao-Hua   

  1. Institute of Polymer Science & Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084,China
  • Received:2005-03-12 Online:2006-02-10 Published:2006-02-10
  • Contact: Guo-Bao-Hua,E-mail:bhguo@mail.tsinghua.edu.cn

Abstract:

Abstract A series of polyesters PBSM, poly(butylene succinate-co-butylene methyl succinate), were obtained by direct melting polycondensation of  succinate and methyl succinic acid with 1,4-butanediol. The compositions and physical properties of the resulted homopolyester and copolyesters were investigated by 1H NMR, differential scanning calorimetry(DSC)and X-ray diffraction. The results suggest that the introduction of comonomer containing a side-chain methyl group led to a change in thermal properties and crystallization behavior. The DSC analysis indicates that with the increase of comonomer content, the Tg, Tm, T0m and crystallinity were decreasing gradually, and the depression of Tm followed Flory′ prediction for random copolymer. Furthermore, an Avrami method was used to analyze the kinetics of isothermal crystallization of PBS and PBSM-20. The Avrami exponents, estimated by Avrami plots, ranging from 2.8 to 3.0 for PBS and 2.7 to 3.0 for PBSM-20 indicate that the mechanism of crystallization for both homopolyester and copolyester was a tridimensional growth with heterogeneous nucleation. Meanwhile, X-ray analysis shows that there was almost no effect of the methyl succinate unit on the crystal structure.

Key words: KeywordsPoly(butylene succinate-co-butylene methyl succinate); Thermal property; Isothermal crystallization kinetic

CLC Number: 

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