Miscibility and Crystallization Behavior of Poly(3-hydroxyvalerate-co-3-hydroxyvalerate)/ Poly(propylene carbonate) Blends

Shuwen Peng, Yuxian An, Cheng Chen, Bin Fei, Yugang Zhuang, Lisong Dong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

45 Citations (Scopus)


Blends of synthetic poly(propylene carbonate) (PPC) with a natural bacterial copolymer of 3-hydroxy-butyrate with 3-hydroxyvalerate (PHBV) containing 8 mol % 3-hydroxyvalerate units were prepared with a simple casting procedure. PPC was thermally stabilized by end-capping before use. The miscibility, morphology, and crystallization behavior of the blends were investigated by differential scanning calorimetry, polarized optical microscopy, wide-angle X-ray diffraction (WAXD), and small-angle X-ray scattering (SAXS). PHBV/PPC blends showed weak miscibility in the melt, but the miscibility was very low. The effect of PPC on the crystallization of PHBV was evident. The addition of PPC decreased the rate of spherulite growth of PHBV, and with increasing PPC content in the PHBV/ PPC blends, the PHBV spherulites became more and more open. However, the crystalline structure of PHBV did not change with increasing PPC in the PHBV/PPC blends, as shown from WAXD analysis. The long period obtained from SAXS showed a small increase with the addition of PPC.
Original languageEnglish
Pages (from-to)4054-4060
Number of pages7
JournalJournal of Applied Polymer Science
Issue number14
Publication statusPublished - 27 Dec 2003
Externally publishedYes


  • Blends
  • Crystallization
  • Miscibility

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry


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