UHMWPE 模压成型技术研究进展：从静态模压到动态模压

佳南 李(韶关学院智能工程学院，中国)
松喜 胡(韶关学院智能工程学院，中国)
正杰 肖(韶关学院智能工程学院，中国)
明豪 李(韶关学院智能工程学院，中国)
奕彬 郭(韶关学院智能工程学院，中国)

摘要

性能优异的超高分子量聚乙烯（UHMWPE）因其极高的熔体粘度和极低的临界剪切速率给加工带来巨大挑战。采用传统静态模压成型需高温长时间加热，易破坏UHMWPE规整排列的初生相结构，导致制品结晶度下降，机械强度低，且效率低、能耗高。动态模压技术通过引入动态力场实现低温成型，但高速冲击模压（HVC）存在界面熔合质量差的问题，而超声模压（UPM）易导致分子链断裂。脉振模压（PVM）作为一种新兴动态模压技术，通过在模压过程中施加脉冲振动压力场，能在较低温度下有效促进分子链运动与界面扩散，显著改善界面熔合质量，同时更好地保留初生相特征结构，从而赋予制品高结晶度、厚晶片以及更优的力学强度和耐磨性。优化PVM工艺参数对提升UHMWPE制品的致密化、界面熔接强度及最终性能至关重要，也为实现高性能UHMWPE制品高效成型提供了有效途径。

关键词

超高分子量聚乙烯；模压成型；动态力场；性能

参考

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DOI: http://dx.doi.org/10.12345/hgyjxjz.v4i1.35888