POM／LDPE共混改性新品级的研究

本文对ＰＯＭ／ＬＤＰＥ／增容剂共混增容改性进行了研究，研究结果表明：增容剂的加入，使ＰＯＭ／ＬＤＰＥ体系中ＬＤＰＥ分散均匀，ＰＯＭ球晶细化，物理力学性能得到改善，且增容剂的用量控制在５－７％为最佳。所研制的新品级的主要性能指标为：拉伸强度５０－６０ＭＰａ，缺口冲击强度≥１２ｋＪ／ｍ＾２，制作的小模数齿轮精度等级达７级，摩擦系数为０．２０－０．３０。

STUDY ON THE NEW GRADE OF POM/LDPE BLEND

The blends of POM/LDPE/compatibilizer are investigated in this paper. The experimental results proclaim that the sizes of the disperse phase particles of LDPE are small and regular in system of POM/LDPE,the spherulite sizes of POM become smaller,the physical and mechanical properties of POM/ LDPE blends are improved by adding compatibilizer Z-1 into the blends of POM and LDPE,and the optimal content of the compatibilizer should be 5%-7% (based on LDPE). The main properties of our new grade of modified POM are that the tensile strength is 50~60MPa,the impact strength (notched) is larger than 12kJ/ m2,the accuracy grade of small mould number gear is Grade 7,the friction coefficient is 0. 2-0. 3.