聚甲醛/热塑性聚氨酯弹性体共混增韧的研究  

Study on increasing the toughness of blends from polyoxymethylene and thermoplastic polyurethane elastomer

作　　者：谢刚[1] 耿凯[1] 王鹏[1] 唐瑞敏[1] 江晓翊[1] 范雪蕾[1] 

机构地区：[1]黑龙江大学化学化工与材料学院,哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2008年第2期163-165,共3页Journal of Natural Science of Heilongjiang University

基　　金：黑龙江省科技攻关项目(GC04A407);哈尔滨市科技攻关项目(2005AA5CG047)

摘　　要：采用热塑性聚氨酯弹性体(TPU),应用双螺杆挤出机采用熔融共混的方法对POM增韧改性进行了研究,对POM/TPU共混体系的力学性能、流动性能和形态进行了测试分析。结果表明:随着TPU用量的增加,共混体系的冲击强度(I)和断裂伸长率(ψ)随之增加,即韧性增加,而拉伸强度(σ)、弯曲强度(σw)、弯曲模量(Ew)和硬度(H)随之降低,即刚性下降。Polyoxymethylene （POM） is an important plastic with pretty good properties. However its poor impact strength and thermo - degradation limit its applications and toughening polyoxymethylene by blending is still too difficult to resolve. Thermoplastic polyurethane elastomer （TPU） and toughened polyoxymethylene are inverstigated with Brabender extrusion melt blending. Rheological and dynamic mechanical properties and morphology of POM/ TPU blends are detemined and analyed. The results shows that impact strenghth and the elongation of blends at break increase, while the tensile strength and modulus decrease with the increase of TPU content.

关 键 词：聚氨酯弹性体 聚甲醛 共混 增韧 

分 类 号：O621[理学—有机化学]