Enhancement of melt elasticity for poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) by addition of weak gel |
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Authors: | Keiichi Arakawa Tadashi Yokohara Masayuki Yamaguchi |
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Affiliation: | School of Materials Science, Japan Advanced Institute of Science and Technology, Nomi, Ishikawa 923‐1292, Japan |
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Abstract: | Rheological properties in a molten state are studied extensively for poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate), PHB‐HV, with a small amount of crosslinked poly(epichlorohydrin), PECH, having low density of crosslink points. It is found that adding 2 wt % of xPECH greatly enhances the melt elasticity of PHB‐HV, one of the serious defects of microbial PHB, whereas it has no effect on the shear viscosity. As a result, viscoelastic nature, and thus processability, of PHB‐HV can be controlled by blending the crosslinked PECH. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 |
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Keywords: | biodegradable polyester blends rheology viscoelastic properties |
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