发泡剂
材料科学
复合材料
块(置换群论)
酰胺
化学工程
高分子科学
高分子化学
聚氨酯
有机化学
化学
几何学
数学
工程类
作者
Haoqing Yang,Guiwei Dong,Guilong Wang,Jinchuan Zhao,Guoqun Zhao
标识
DOI:10.1002/mame.202300437
摘要
Abstract Polyether block amide (PEBA) is an important thermoplastic polyester elastomer (TPE) owing to its low density and high resilience. Microcellular foaming can endow PEBA with significant potential in sports, medical, and industrial applications. However, with the current microcellular foaming technology, it remains challenging to obtain PEBA foams with stable shapes, which are critical for their mechanical properties. Therefore, microcellular foaming with CO 2 and N 2 as co‐blowing agents is utilized in this study to achieve mechanically robust PEBA foams by reducing the dimensional shrinkage. The introduction of N 2 can effectively slow the diffusion rate of blowing agents into the air, providing support for the foam to resist external atmospheric pressure and effectively reducing the dimensional shrinkage of PEBA foams. Consequently, a stable foam shape is achieved with an expansion ratio of 7.9. Finally, the PEBA foams with excellent shrinkage resistance and mechanical properties are prepared, and the cell shrinkage mechanism is analyzed to study the effects of blowing agents and foaming methods on the structural evolution of TPE foams. This promising outcome paves way for their practical industrial applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI