Phase behavior and thermal properties for binary blends of compositionally fractionated poly(3-hydroxybutyrate-co-3-hydroxypropionate)s with different comonomer composition
Phase behavior and thermal properties for binary blends of compositionally fractionated poly(3-hydroxybutyrate-co-3-hydroxypropionate)s with different comonomer composition
复制标题
具有不同共聚单体组成的按组成分级的聚(3-羟基丁酸酯-co-3-羟基丙酸酯)的二元共混物的相行为和热性能
DOI：
10.1021/ma010270h
复制
发表时间：
2001
期刊：
影响因子：
5.5
通讯作者：
Y. Inoue
中科院分区：
文献类型：
--
作者：
Yang;Y. Arai;N. Asakawa;N. Yoshie;Y. Inoue
利用细菌合成的聚（3-羟基丁酸酯-co-3-羟基丙酸酯）[P(3HB-co-3HP)]样品采用溶剂/非溶剂分馏技术进行组分分馏。采用差示扫描量热仪（DSC）和偏振光显微镜研究了这些组分分馏的P（3HB-co-3HP）样品之间的二元共混物的热结晶行为。研究发现，在非晶共混物中，共混物的混相主要取决于共混物中两组分3HP含量（或3HB含量）的差异。当两种共聚酯的3HP含量差小于30 ~ 40 mol %时，它们在非晶相中发生混溶。晶格类型、混相以及两组分球晶生长速率的差异是控制晶相行为的重要因素。结果与…
Bacterially synthesized poly(3-hydroxybutyrate-co-3-hydroxypropionate) [P(3HB-co-3HP)] samples were compositionally fractionated using solvent/nonsolvent fractionation techniques. Binary blends between these compositionally fractionated P(3HB-co-3HP) samples, with much narrower comonomer compositional distribution, were prepared, and their thermal and crystallization behavior were studied using differential scanning calorimeter (DSC) and polarized optical microscopy. It was found that, in the amorphous phase of these blends, the miscibility mainly depends on the difference of 3HP contents (or 3HB contents) between the two components of the blend. When the difference of 3HP content between two copolyesters is less than 30−40 mol %, they become miscible in the amorphous phase. The type of crystal lattice, miscibility, and difference of the spherulite growth rate between the two components of the blend appear to be the important factors controlling the crystalline phase behavior. The results are compared wit...