Preparation and Rheological Characterization of Long Chain Branching Polyglycolide

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Chinese Journal of Polymer Science Pub Date : 2024-05-17 DOI:10.1007/s10118-024-3118-4

Wei-Lin Liu, Ming-Fu Lyu, Heng-Yuan Zhang, Jian-Ye Liu, Shi-Jun Zhang

引用次数: 0

Abstract

The long chain branching (LCB) polyglycolide (PGA) was successfully prepared by the successive reactions of the terminal hydroxyl groups of PGA with triglycidyl isocyanurate (TGIC) and pyromellitic dianhydride (PMDA). The influence of LCB produced by functional group reaction on rheological and crystallization behavior was studied and discussed through linear rheology, uniaxial elongation and DSC (differential scanning calorimetry). The much higher viscosity and the more notable strain hardening behavior of modified PGA indicates the LCB with high degree of entanglements are created. The melt strength of PGA is finally improved greatly and can make sure that the supercritical CO₂ foaming can be carried out successfully.

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长链支化聚乙二醇的制备与流变特性

通过 PGA 的末端羟基与异氰尿酸三缩水甘油酯（TGIC）和偏苯三酸酐（PMDA）的连续反应，成功制备了长链支化（LCB）聚乙二醇（PGA）。通过线性流变学、单轴伸长率和 DSC（差示扫描量热仪）研究和讨论了官能团反应产生的 LCB 对流变和结晶行为的影响。改性 PGA 更高的粘度和更明显的应变硬化行为表明产生了具有高度缠结的 LCB。最终，PGA 的熔体强度大大提高，确保了超临界 CO2 发泡的成功进行。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.