Control and development of crystallinity and morphology in poly(β-hydroxybutyrate-co-β-hydroxyvalerate)/poly(propylene carbonate) blends

Two different methodologies (reactive blending and mechanical blending) for preparing blends of poly(β‐hydroxybutyrate‐co‐β‐hydroxyvalerate) (PHBV) and poly(propylene carbonate) (PPC) were used. The miscibility, chemical structure, thermal behavior, crystallinity, morphology, and mechanical properti...

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Bibliographic Details
Published in:Journal of applied polymer science 2005-11, Vol.98 (3), p.1427-1436
Main Authors: Li, J., Lai, M. F., Liu, J. J.
Format: Article
Language:English
Subjects:
Applied sciences
biodegradable
blends
crystallization
Exact sciences and technology
morphology
Organic polymers
Physicochemistry of polymers
Properties and characterization
reactive processing
Structure, morphology and analysis
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Summary:Two different methodologies (reactive blending and mechanical blending) for preparing blends of poly(β‐hydroxybutyrate‐co‐β‐hydroxyvalerate) (PHBV) and poly(propylene carbonate) (PPC) were used. The miscibility, chemical structure, thermal behavior, crystallinity, morphology, and mechanical properties of the blends were investigated with Fourier transform infrared spectroscopy, differential scanning calorimetry, polarized optical microscopy, scanning electron microscopy, and tensile tests. A certain extent of hydrogen‐bonding interactions between PHBV and PPC took place in the blends. The graft copolymerization was confirmed in the reactive system. The incorporation of PPC hampered the crystallization process of PHBV and evidently altered the morphology, and the effect was enhanced in the reactive blend. The mechanical properties of PHBV could be changed by 1–2 orders of magnitude by blending modification. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 1427–1436, 2005
ISSN:0021-8995
1097-4628
DOI:10.1002/app.22117