力化学技术在聚合物加工中的应用进展

Application Advances of Mechanochemical Technology in Polymer Processing

对应力作用下聚合物分子链的断裂机理进行了评述,指出了大分子链在应力作用下的断裂与分子结构密切相关,其键能薄弱处倾向于优先断裂。介绍了力化学合成嵌段和(或)接枝共聚物的原理和主要途径,分析了力化学合成与聚合物分子链的结构和强度间的关系。综述了通过力化学技术改善聚合物共混体系的互容性,获得具有特殊结构与形态和性能的高分子合金材料方面的研究进展,最后展望了力化学技术在聚合物加工中的应用前景。

There is growing interest in mechanochemistry anti me aenoe mechanochemical effects. When polymers are exposed to adequate stress in solid-state, the universal mechanochemical response is for the macromolecules to be broken at weakest points in the chain. It has been confirmed that chain scission, resulting in polymeric radicals, may be followed by some amount of in-situ radical-radical coupling reactions forming block copolymer at interracial regions in blends during mechanical milling. In this article, the research advances of mechanochemical technologies （especially mechanochemical synthesis and mechanical alloying） and their application in polymer processing were reviewed. The mechanism of the mechanical rupture of macromolecular chains when suffering stress was also discussed.