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作为五大工程塑料之一的聚甲醛(POM)具有优良的综合性能,但也存在一些不足之处。如冲击韧性低、缺口敏感性大、耐热性差、摩擦系数较高等,这些缺点极大地限制了聚甲醛在各个领域中应用范围的扩大,为此,近年来POM的共混收性研究很活跃。 POM/热塑性聚氨酯弹性体(TPUR)合金由于聚甲醛结晶度较高,结晶晶粒较大,在受冲击,特别是当应力增加时,往往以脆性方式遭到破坏。热塑性聚氨酯弹性体是一种既具有橡胶弹性
Polyoxymethylene (POM), one of the five engineering plastics, has excellent overall performance, but there are some shortcomings. Such as low impact toughness, large notch sensitivity, poor heat resistance and high friction coefficient, which greatly limit the expansion of the range of applications of POM in various fields. Therefore, in recent years, the research on the blend of POM has been very active . POM / Thermoplastic Polyurethane Elastomer (TPUR) alloys, due to the higher degree of crystallinity of POM, have larger crystalline grains and are often impacted in a brittle manner when subjected to impact, particularly as the stress increases. Thermoplastic polyurethane elastomer is a kind of both rubber elasticity