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Enhancement of melt elasticity for poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) by addition of weak gel
Author(s) -
Arakawa Keiichi,
Yokohara Tadashi,
Yamaguchi Masayuki
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26631
Subject(s) - epichlorohydrin , rheology , materials science , viscoelasticity , elasticity (physics) , chemical engineering , viscosity , polymer chemistry , composite material , engineering
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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