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An innovative strategy to regulate bimodal cellular structure in chain extended poly(butylene adipate‐co‐terephthalate) foams
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2020-09-21 , DOI: 10.1002/vnl.21805 Yalin Cui 1 , Haoyan Zhou 2 , Dexian Yin 1 , Hongfu Zhou 1 , Xiangdong Wang 1
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2020-09-21 , DOI: 10.1002/vnl.21805 Yalin Cui 1 , Haoyan Zhou 2 , Dexian Yin 1 , Hongfu Zhou 1 , Xiangdong Wang 1
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A facile and effective approach for manufacturing poly(butylene adipate‐co‐terephthalate) (PBAT) foams with obvious bimodal cellular structure (BCS) was proposed utilizing chain extension and batch supercritical CO2 foaming technology. Ethylene‐glycidyl methacrylate copolymer (EGMA) as crystalline chain extender was selected to modify PBAT. The results of torque tests, differential scanning calorimetry, and rheological performances demonstrated that the melt strength, viscoelasticity, and crystallization properties of PBAT were improved after introducing EGMA. The influences of EGMA content and foaming temperature on the cellular structure of PBAT foams were investigated systematically. By decreasing the foaming temperature, the size of both large and small cells in the bimodal chain extended PBAT‐3 (CPBAT‐3) foams decreased, as well as their BCS became distinct gradually. The BCS in diverse CPBAT foams was successfully controlled via varying EGMA content and foaming temperature. Finally, the formation mechanism of BCS in diverse PBAT foams was presented.
中文翻译：
调节扩链聚己二酸丁二醇酯-对苯二甲酸丁二醇酯泡沫中双峰孔结构的创新策略
用于制造聚一种简便而有效的方法（亚丁基己二酸酯共-terephthalate）（PBAT）有明显的双峰多孔结构泡沫（BCS）中提出了利用扩链和批量超临界二氧化碳2发泡技术。选择乙烯-甲基丙烯酸缩水甘油酯共聚物（EGMA）作为结晶扩链剂来修饰PBAT。扭矩测试，差示扫描量热法和流变性能的结果表明，引入EGMA后，PBAT的熔体强度，粘弹性和结晶性能得到改善。系统地研究了EGMA含量和发泡温度对PBAT泡沫孔结构的影响。通过降低发泡温度，双峰链延伸的PBAT-3（CPBAT-3）泡沫中大泡孔和小泡孔的大小均减小，并且其BCS逐渐变得明显。通过改变EGMA含量和发泡温度，成功控制了各种CPBAT泡沫中的BCS。最后，介绍了BCS在多种PBAT泡沫中的形成机理。
更新日期：2020-09-21
中文翻译：
调节扩链聚己二酸丁二醇酯-对苯二甲酸丁二醇酯泡沫中双峰孔结构的创新策略
用于制造聚一种简便而有效的方法（亚丁基己二酸酯共-terephthalate）（PBAT）有明显的双峰多孔结构泡沫（BCS）中提出了利用扩链和批量超临界二氧化碳2发泡技术。选择乙烯-甲基丙烯酸缩水甘油酯共聚物（EGMA）作为结晶扩链剂来修饰PBAT。扭矩测试，差示扫描量热法和流变性能的结果表明，引入EGMA后，PBAT的熔体强度，粘弹性和结晶性能得到改善。系统地研究了EGMA含量和发泡温度对PBAT泡沫孔结构的影响。通过降低发泡温度，双峰链延伸的PBAT-3（CPBAT-3）泡沫中大泡孔和小泡孔的大小均减小，并且其BCS逐渐变得明显。通过改变EGMA含量和发泡温度，成功控制了各种CPBAT泡沫中的BCS。最后，介绍了BCS在多种PBAT泡沫中的形成机理。
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