Quantitative FTIR study of PHBV/bisphenol A blends

Bin Fei, Cheng Chen, Hang Wu, Shuwen Peng, Xiuyan Wang, Lisong Dong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

45 Citations (Scopus)

Abstract

FTIR spectroscopy was used to verify the presence of intermolecular hydrogen bond (inter-H-bond) between poly(3-hydroxybutyrate co-3-hydroxyvalerate) (PHBV) and bisphenol A (BPA). By monitoring the spectral changes during PHBV crystallization and blends dissociation, the absorptivity ratio of C=O bonds in crystalline and amorphous regions in PHBV and that of H-bonded and free C=O in PHBV/BPA blends were experimentally determined as 1.40 and 1.68, respectively. Using curve-fitting program, the C=O absorptions in spectra of blends were ascribed to three types of bonds: amorphous, crystalline and H-bonded C=O. The crystallinity of PHBV and the fraction of H-bonded C=O were calculated. These results indicated that the H-bond clearly suppressed the PHBV crystallization. Furthermore, the fraction of BPA molecules that simultaneously formed two hydrogen bonds (H-bonds) with C=O was estimated. It revealed that there existed a H-bond network in PHBV/BPA blends. This network was compared with the covalent network by estimating the number of atoms between every two adjacent crosslink points in chain. Up to the high density of H-bond discussed in this paper, there was always a certain part in PHBV that crystallized due to the dynamic character of hydrogen bonds; however, the hydrogen bonds significantly reduced the crystallization rate of PHBV.
Original languageEnglish
Pages (from-to)1939-1946
Number of pages8
JournalEuropean Polymer Journal
Volume39
Issue number10
DOIs
Publication statusPublished - 1 Oct 2003
Externally publishedYes

Keywords

  • Bisphenol A
  • Blends
  • FTIR
  • Hydrogen bond
  • Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Polymers and Plastics
  • Organic Chemistry

Cite this