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Two-dimensional Fourier transform infrared spectroscopy study of biosynthesized poly(hydroxybutyrate-co-hydroxyhexanoate) and poly(hydroxybutyrate-co-hydroxyvalerate)
- Source :
- Journal of Polymer Science Part B: Polymer Physics. 40:649-656
- Publication Year :
- 2002
- Publisher :
- Wiley, 2002.
-
Abstract
- Generalized two-dimensional (2D) Fourier transform infrared correlation spectroscopy was used to investigate the effect of the comonomer compositions on the crystallization behavior of two types of biosynthesized random copolymers, poly(hydroxybutyrate-co-hydroxyhexanoate) and poly(hydroxybutyrate-co-hydroxyvalerate). The carbonyl absorption band around 1730 cm−1 was sensitive to the degree of crystallinity. 2D correlation analysis demonstrated that the 3-hydroxyhexanoate units preferred to remain in the amorphous phase of the semicrystalline poly(hydroxybutyrate-co-hydroxyhexanoate) copolymer, resulting in decreases in the degree of crystallinity and the rate of the crystallization process. The poly(hydroxybutyrate-co-hydroxyvalerate) copolymer maintained a high degree of crystallinity when the 3-hydroxyvalerate fraction was increased from 0 to 25 mol % because of isodimorphism. The crystalline and amorphous absorption bands for the carbonyl bond for this copolymer, therefore, changed simultaneously. © 2002 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 40: 649–656, 2002; DOI 10.1002/polb.10126
- Subjects :
- Materials science
Polymers and Plastics
Comonomer
Condensed Matter Physics
Amorphous solid
law.invention
chemistry.chemical_compound
Crystallinity
Chemical engineering
chemistry
Absorption band
law
Polymer chemistry
Materials Chemistry
Copolymer
Physical and Theoretical Chemistry
Crystallization
Fourier transform infrared spectroscopy
Absorption (chemistry)
Subjects
Details
- ISSN :
- 10990488 and 08876266
- Volume :
- 40
- Database :
- OpenAIRE
- Journal :
- Journal of Polymer Science Part B: Polymer Physics
- Accession number :
- edsair.doi...........35b5973b97655ff561401c28551262a3