Miscibility, crystallization kinetics, and mechanical properties of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(PHBV)/poly(3-hydroxybutyrate-co-4- hydroxybutyrate)(P3/4HB) blends

Xiaojuan Wang, Zhifei Chen, Xianyu Chen, Jueyu Pan, Kaitian Xu

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Poly(3-hydroxybutyrate-co-3-hydroxyvalera-te)(PHBV)/poly(3-hydroxybutyrate- co-4-hydroxybutyrate) (P3/4HB) blend films were prepared by solvent-cast method. The nonisothermal crystallization results showed that PHBV and P3/4HB are miscible due to a single glass transition temperature (Tg), which is dependent on blend composition. The isothermal crystallization results demonstrate that the crystallization rate of PHBV becomes slower after adding amorphous P3/4HB with 19.2 mol% 4HB, which could be proved through depression of equilibrium melt point (Tm0) from 183.7°C to 177.6°C. For pure PHBV and PHBV/P3/4HB (80/20) blend, the maximum crystalli-zation rate appeared at 88°C and 84°C, respectively. FTIR analysis showed that PHBV/P3/4HB blend films would maintain the helical structure, similar to pure PHBV. Meanwhile, with increasing P3/4HB content, the inter- and intra-interactions of PHBV and P3/4HB decrease gradually. Besides, a lower elastic modulus and a higher elongation at break were obtained, which show that the addition of P3/ 4HB would make the brittle PHBV to ductile materials.

Original languageEnglish (US)
Pages (from-to)838-848
Number of pages11
JournalJournal of Applied Polymer Science
Volume117
Issue number2
DOIs
StatePublished - Jul 15 2010

All Science Journal Classification (ASJC) codes

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

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