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Some properties of poly(3‐hydroxybutyrate)–poly(3‐hydroxyvalerate) blends
Author(s) -
Gassner F.,
Owen A. J.
Publication year - 1996
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199603)39:3<215::aid-pi497>3.0.co;2-0
Subject(s) - materials science , crystallite , copolymer , crystallization , poly 3 hydroxybutyrate , melting temperature , polymer blend , morphology (biology) , phase (matter) , chemical engineering , composite material , polymer , chemistry , organic chemistry , metallurgy , biology , engineering , genetics
The melting, crystallization and dynamic mechanical behaviour of blends of bacterially produced poly[ D (–)‐3‐hydroxybutyrate] (PHB) and poly[ D (–)‐3‐hydroxyvalerate] (PHV) have been investigated. Results showed that melt‐pressed PHB–PHV blends contained phase‐separated domains in the melt which subsequently crystallized as PHB and PHV type spherulites respectively. The two melting regions detected by DTA related to separate melting of PHB and PHV crystallites, which were almost unaffected by the blend composition. The mechanical behaviour of a random copolymer of PHB/HV was compared with that of a blend of almost the same composition, and found to be markedly different.