Studies on comonomer compositional distribution and its effect on some physical properties of bacterial poly(3-hydroxybutyric acid-co-3-hydroxypropionic acid)
Studies on comonomer compositional distribution and its effect on some physical properties of bacterial poly(3-hydroxybutyric acid-co-3-hydroxypropionic acid)
复制标题
细菌聚(3-羟基丁酸-co-3-羟基丙酸)共聚单体组成分布及其对某些物理性能的影响研究
DOI：
--
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
Y. Inoue
中科院分区：
文献类型：
--
作者：
Y. Arai;Amin Cao;N. Yoshie;Y. Inoue
采用溶剂/非溶剂分级技术研究了细菌合成的聚(3-羟基丁酸-3-羟基丙酸)[P(3HB-co-3HP)]的共聚单体组成分布。结果表明，原细菌产品中存在着极其广泛的共聚单体组成分布。此外，利用共聚单体组成分布窄得多的组成分馏细菌共聚酯，利用差示扫描量热仪(DSC)和偏光显微镜研究了3HP共聚单体含量对其热行为和结晶行为的影响，并与未分馏共聚酯的结果进行了比较。结果表明，分馏共聚酯P(3HB-co-3HP)S的物理性质强烈依赖于3HP共聚单体的含量。此外，为了弄清组成分布对未分级共聚酯性能的影响，研究了细菌聚3-羟基丁酸[P(3HB)]与两个分级P(3HB-co-3HP)样品在溶剂浇铸共混物中的相容性。热分析和球晶生长速度的证据表明P(3HB)/富3HB的P(3HB-co-3HP)二元共混物是相容的。
©1999化学工业学会
Comonomer compositional distribution of bacterially synthesized poly(3-hydroxybutyric acid-co-3-hydroxypropionic acid) [P(3HB-co-3HP)] was investigated via solvent/non-solvent fractionation techniques. The result indicates the presence of extremely broad comonomer compositional distribution in the original bacterial product. Furthermore, utilizing compositionally fractionated bacterial copolyesters with much narrower comonomer compositional distributions, the 3HP comonomer content-dependence of their thermal and crystallization behavior was studied by means of differential scanning calorimeter (DSC) and polarized optical microscopy and the results compared with those of unfractionated copolyesters. It was revealed that the physical features of the fractionated copolyester P(3HB-co-3HP)s strongly depends on the 3HP comonomer content. In addition, to clarify the effect of the compositional distribution on the properties of the unfractionated copolyester, the miscibility between bacterial poly(3-hydroxybutyric acid) [P(3HB)] and two fractionated P(3HB-co-3HP) samples with 11.3 and 14.9% 3HP was investigated for blends obtained by solvent casting techniques. The evidence of thermal analysis and spherulitic growth rates imply miscibility of the P(3HB)/3HB-rich P(3HB-co-3HP) binary blends.
© 1999 Society of Chemical Industry