| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5202708 | Polymer Degradation and Stability | 2011 | 9 Pages |
Abstract
In this study, poly(trimethylene terephthalate)-co-poly(l-lactic acid) (PTT-co-PLLA) copolyesters with different compositions were synthesized by melt polycondensation. The crystal morphologies of PTT-co-PLLA copolyesters were investigated with polarized light microscope (PLM). It was found that PTT-co-PLLA copolyesters exhibited banded spherulites with smaller band spacing at the same degree of super-cooling compared with PTT homopolymer. The PLLA segments in those copolyesters ranged from 0 to 28.4Â mol% and did not form crystals during crystallization. Hydrolysis study on PTT homopolymer and PTT-co-PLLA copolyesters was carried out in buffer solutions. PTT-co-PLLA copolyesters represented pronounced hydrolytic degradation, which increased with the content of lactyl units. And it was concluded that degradation of PTT-co-PLLA was mainly attributed to the scission of PLLA segments.
Keywords
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Jun Li, Zhi-Qiang Jiang, Zong-bao Wang, Peng Chen, Ya Li, Jian Zhou, Ji Liu, Yu-zhong Wang, Qun Gu,