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Simple and feasible strategy to fabricate microcellular poly(butylene succinate) foams by chain extension and isothermal crystallization induction
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2019-12-19 , DOI: 10.1002/app.48850 Dexian Yin 1, 2 , Jianguo Mi 3 , Hongfu Zhou 1, 2 , Xiangdong Wang 1, 2 , Kejing Yu 4
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2019-12-19 , DOI: 10.1002/app.48850 Dexian Yin 1, 2 , Jianguo Mi 3 , Hongfu Zhou 1, 2 , Xiangdong Wang 1, 2 , Kejing Yu 4
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In this article, a facile and efficient isothermal crystallization induction method was proposed to fabricate microcellular poly(butylene succinate) (PBS) foams with supercritical CO2. The good regularity of PE chain segments and high reactive epoxy groups in ethylene‐glycidyl methacrylate copolymer (PE‐g‐GMA) serving as a chain extender were employed to improve the crystallization behaviors, viscoelasticity, and foaming behaviors of PBS through chain extension reaction. The effect of PE‐g‐GMA content on the thermal properties, rheological performances, and cellular morphology of various PBS samples was investigated systematically. When the PE‐g‐GMA content switched from 7.5 to 10 wt %, an interesting transition from fine cells to microcells was observed in PBS/PE‐g‐GMA foams. Microcellular PBS foam modified by 10 wt % PE‐g‐GMA was successfully prepared at the foaming temperature of 87 °C and the induction time of 7 min, in which its cell size and cell density could reach 6.63 ± 1.93 μm and 3.75 × 109 cells cm−3, respectively. The formation of abundant but tiny spherocrystals in chain extended PBS samples made a considerable contribution for preparing microcellular PBS foams. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48850.
中文翻译：
通过扩链和等温结晶诱导制备微孔聚丁二酸丁二醇酯泡沫的简单可行策略
本文提出了一种简便高效的等温结晶诱导方法，以制备具有超临界CO 2的微孔聚丁二酸丁二醇酯（PBS）泡沫。用作扩链剂的乙烯-甲基丙烯酸缩水甘油酯共聚物（PE- g- GMA）中的PE链段和高反应性环氧基团具有良好的规则性，可通过扩链反应改善PBS的结晶行为，粘弹性和发泡行为。系统研究了PE- g- GMA含量对各种PBS样品的热性能，流变性能和细胞形态的影响。当PE- g‐GMA含量从7.5 wt％切换到10 wt％，在PBS / PE- g‐ GMA泡沫中观察到了从细孔到微孔的有趣转变。在87°C的发泡温度和7 min的诱导时间下，成功制备了用10 wt％PE‐ g ‐GMA改性的微孔PBS泡沫，其泡孔尺寸和泡孔密度可以达到6.63±1.93μm和3.75×10分别为9个单元cm -3。在扩链的PBS样品中大量但微小的球晶的形成为制备微孔PBS泡沫做出了巨大贡献。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学 2020，137，48850。
更新日期：2020-03-27
中文翻译：
通过扩链和等温结晶诱导制备微孔聚丁二酸丁二醇酯泡沫的简单可行策略
本文提出了一种简便高效的等温结晶诱导方法，以制备具有超临界CO 2的微孔聚丁二酸丁二醇酯（PBS）泡沫。用作扩链剂的乙烯-甲基丙烯酸缩水甘油酯共聚物（PE- g- GMA）中的PE链段和高反应性环氧基团具有良好的规则性，可通过扩链反应改善PBS的结晶行为，粘弹性和发泡行为。系统研究了PE- g- GMA含量对各种PBS样品的热性能，流变性能和细胞形态的影响。当PE- g‐GMA含量从7.5 wt％切换到10 wt％，在PBS / PE- g‐ GMA泡沫中观察到了从细孔到微孔的有趣转变。在87°C的发泡温度和7 min的诱导时间下，成功制备了用10 wt％PE‐ g ‐GMA改性的微孔PBS泡沫，其泡孔尺寸和泡孔密度可以达到6.63±1.93μm和3.75×10分别为9个单元cm -3。在扩链的PBS样品中大量但微小的球晶的形成为制备微孔PBS泡沫做出了巨大贡献。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学 2020，137，48850。
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