Quantitative FTIR study of PHBV/bisphenol A blends
Fei, B; Chen, C; Wu, H; Peng, SW; Wang, XY; Dong, LS
AbstractFTIR 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. (C) 2003 Elsevier Ltd. All rights reserved.
KeywordPoly(3-hydroxybutyrate-co-3-hydroxyvalerate) Bisphenol a Blends Ftir Hydrogen Bond
Indexed BySCI
WOS IDWOS:000185733300001
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Cited Times:37[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorDong, LS
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
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GB/T 7714
Fei, B,Chen, C,Wu, H,et al. Quantitative FTIR study of PHBV/bisphenol A blends[J]. EUROPEAN POLYMER JOURNAL,2003,39(10):1939-1946.
APA Fei, B,Chen, C,Wu, H,Peng, SW,Wang, XY,&Dong, LS.(2003).Quantitative FTIR study of PHBV/bisphenol A blends.EUROPEAN POLYMER JOURNAL,39(10),1939-1946.
MLA Fei, B,et al."Quantitative FTIR study of PHBV/bisphenol A blends".EUROPEAN POLYMER JOURNAL 39.10(2003):1939-1946.
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