Synergistic Effect of Multi-Arm Architecture and Molecular Weight on Crystallization and Degradation Behavior of Star-Shaped Poly(Lactic Acid)

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Chinese Journal of Polymer Science Pub Date : 2024-11-07 DOI:10.1007/s10118-024-3229-y

Nan Tian, Yi-Qing Li, Hong-Yi Gan, Zhen-Bo Ning, Ni Jiang, Zhi-Hua Gan

引用次数: 0

Abstract

Star-shaped poly(lactic acid)s (PLAs) with two to five arms were synthesized by ring opening polymerization using tin(II) 2-ethylhexanoate as catalyst and polyols as initiators. The effects of molecular weight together with multi-arm architecture on crystallization behavior, spherulite morphology and alkaline degradation behavior of star-shaped PLAs have been investigated. The results indicate that the multi-arm architecture interfered with spherulite growth, but promoted nucleation and alkaline degradation of star-shaped PLAs. Interestingly, with the increase of molecular weight (M_n), the crystallization rate first increased and then decreased, while the alkaline degradation rate was the opposite. The characteristic crystallization and alkaline degradation behavior of star-shaped PLAs were discussed based on the competition between segmental mobility and central core confinement.

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来源期刊

Chinese Journal of Polymer Science 化学-高分子科学

CiteScore

7.10

自引率

11.60%

发文量

218

审稿时长

6.0 months

期刊介绍： Chinese Journal of Polymer Science (CJPS) is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry, Chinese Academy of Sciences. CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included. The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. CJPS is a peer-reviewed journal dedicated to the timely publication of original research ideas and results in the field of polymer science. The issues may carry regular papers, rapid communications and notes as well as feature articles. As a leading polymer journal in China published in English, CJPS reflects the new achievements obtained in various laboratories of China, CJPS also includes papers submitted by scientists of different countries and regions outside of China, reflecting the international nature of the journal.