Article
  • Preparation and Crystallization Behavior of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Grafted with Poly(N-vinylpyrrolidone)
  • Wang W, Zhang Y, Chen Y
  • Poly(N-vinylpyrrolidone)이 그래프트된 Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) 공중합체의 합성 및 결정화 거동
  • Wang W, Zhang Y, Chen Y
Abstract
Poly(N-vinylpyrrolidone)(PVP) groups were grafted onto a poly(3-hydroxybutyrateco-3-hydroxyvalerate)(PHBV) backbone in order to modify its properties and synthesize a novel biocompatible copolymer. The crystallization behavior of PHBV and grafted PHBV was investigated by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). During the coolinginduced crystallization process, the crystallization temperature and the crystallization rate of the grafted PHBV decreased with increasing PVP weight fraction. On the heating scans of all grafted PHBV samples, a new crystallization exothermic peak appeared at almost the same temperature, suggesting the operation of a recrystallization process, while the melting temperature (Tm) and the apparent enthalpy of fusion (Δ Hf) were not affected by graft modification. During the isothermal crystallization process at the same temperature, the presence of side PVP groups decreased the spherulitic growth rate and the spherulitic band spacing with increasing PVP weight fraction in samples.

Keywords: poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(PHBV); poly(N-vinylpyrrolidone)(PVP); graft modification; crystallization behavior; spherulitic growth rate

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2007; 31(5): 385-392

    Published online Sep 25, 2007

  • 10.7317/pk.
  • Received on Mar 22, 2007
  • Revised on Nov 30, -0001
  • Accepted on May 9, 2007

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