Thermal properties and crystallization behavior of fractionated blocky and random polyhydroxyalkanoate copolymers from mixed microbial cultures

摘要: This study represents the first detailed analysis of thermal, morphological, and crystallization properties blend components within a range mixed-culture polyhydroxyalkanoates (PHAs), with 3-hydroxyvalerate content in as-produced materials fractions ranging from low (12 mol %) to high (91 %). Both coarse fine fractionation copolymers confirmed that they were blends nominally blocky and/or random poly(3-hydroxybutyrate-co-3-hydroxyvalerate), very broad compositional distributions as governed by PHA accumulation strategy. The kinetics thermal found be significantly different each other, consistent hypothesis overall mechanical primarily controlled more rapidly crystallizing components. Two produced using an alternating feeding strategy demonstrated unique their fractions, which are considered have contributed distinctly elastic these particular samples.