己二酸
发泡剂
材料科学
流变学
结晶度
结晶
扩展器
聚合物
超临界流体
复合材料
化学工程
高分子化学
聚氨酯
有机化学
化学
工程类
作者
Songmin Jia,Hongfu Zhou,Xiangdong Wang,Yuxia Zhang,Jianguo Mi
摘要
ABSTRACT Currently, the fabrication of microcellular semicrystalline polymer foam using supercritical CO 2 as a blowing agent constitutes a worldwide interest. In this work, a facile approach of chain extension and batch foaming was proposed to prepare microcellular semicrystalline poly (butylene adipate‐co‐terephthalate) (PBAT) foam using CO 2 as a physical blowing agent. With the introduction of chain extender (CE), the weight‐average molecular weight and gel fraction of PBAT samples increased; their crystallization temperature increased from 74.2 to 86.9 °C and their viscoelasticity was improved greatly. Microcellular PBAT foams with the cell size <4 μm and the cell density more than 10 10 cells cm −3 were fabricated successfully. With increasing concentration of CE, the cell density and volume expansion ratio (VER) of various PBAT foams increased from 3.4 × 10 10 to 8.7 × 10 10 cells cm −3 and from 1.5 to 2.0 times, respectively. With increasing foaming temperature, the cell size and VER increased and the cell density decreased. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47322.
科研通智能强力驱动
Strongly Powered by AbleSci AI