In this article, a facile and green strategy of nonisothermal crystallization induction was proposed to produce nanocellular biodegradable polymer composite foams, which was demonstrated by a composite system of poly(butylene succinate) (PBS) modified by hydroxyl‐functionalized graphene (HG) and chain extender. Nanocellular foams of chain extended PBS (CPBS) and CPBS/HG composite were prepared successfully with supercritical CO₂. Two significant phenomena about the preparation of nanobubbles in CPBS and CPBS/HG composite foams were found. One was that the nanobubbles generated at the temperature region of crystallization transition and the other was that chain extension played a critical function in the generation of nanobubbles. As the foaming temperature switched from 86 to 85°C, an interesting microbubble to nanobubble transition in CPBS and CPBS/HG foams was observed. Due to the generation of nanobubbles and the enhancement of volume expansion ratio, an excellent thermal insulation performance was achieved by CPBS/HG foams. J. VINYL ADDIT. TECHNOL., 26:461–474, 2020. © 2020 Society of Plastics Engineers

中文翻译：

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非等温结晶诱导制备纳米多孔聚琥珀酸丁二酯/羟基官能化石墨烯复合泡沫的简便绿色方法

本文提出了一种非等温结晶诱导的简便而绿色的策略来生产可生物降解的纳米细胞聚合物复合泡沫，这是通过羟基官能化石墨烯（HG）和链修饰的聚丁二酸丁二醇酯（PBS）的复合体系来证明的。补充剂。用超临界CO ₂成功制备了扩链PBS（CPBS）和CPBS / HG复合材料的纳米泡沫。发现了有关在CPBS和CPBS / HG复合泡沫中制备纳米气泡的两个重要现象。一个是在结晶转变的温度区域产生的纳米气泡，另一个是链延伸在纳米气泡的产生中起关键作用。当发泡温度从86℃切换到85℃时，在CPBS和CPBS / HG泡沫中观察到了有趣的微气泡向纳米气泡的转变。由于纳米气泡的产生和体积膨胀率的提高，CPBS / HG泡沫获得了出色的隔热性能。J.乙烯基添加物。TECHNOL。，26：461–474，2020.©2020塑料工程师协会