复合应力场对PE-HD／PP／SGF取向结晶的影响  

EFFECT OF COMPOUND STRESS FIELD ON MOLECULE ORIENTATION AND CRYSTALLINITY OF PE-HD/PP/SGF PIPES

作　　者：袁毅[1,2] 黄朗[1,2] 徐绍虎[1,2] 申开智[3] 

机构地区：[1]重庆工商大学机械工程学院 [2]重庆工商大学废油资源化技术与装备教育部工程研究中心,重庆400067 [3]四川大学高分子科学与工程学院高分子材料工程国家重点实验室,成都610065

出　　处：《工程塑料应用》2011年第11期37-39,共3页Engineering Plastics Application

基　　金：国家自然科学基金项目(10590351);重庆市科技攻关计划项目(CSTC,2010AC4062)

摘　　要：利用自行设计制造的剪切拉伸双向复合应力场挤管装置制备了双向增强的高密度聚乙烯/聚丙烯/短玻璃纤维(PE-HD/PP/SGF)管材。采用大角X射线衍射法和差示扫描量热法研究了该双向应力场对复合体系分子取向行为和结晶行为的影响。结果表明,剪切拉伸双向复合应力场能改善体系分子的取向并促进体系结晶。管材周向晶面的衍射强度提高了近80%,而轴向晶面提高了100%以上;α晶的结晶度从65.69%提高到66.87%,β晶的结晶度从1.39%提高到2.17%。By shearing-drawing two-dimensional compound stress field die developed by the authors, two-dimensional reinforcement / high density polyethylene / polypropylene / short glass fiber （ PE-HD / PP / SGF ） pipes were extruded.The effect of two-dimensional compound stress field on molecule orientation and crystallinity of these pipes was studied by wide-angle X-ray diffraction （ WAXD ） and differential scanning calorimetry （ DSC ） .The results indicated that the shearing-drawing two-dimensional compound stress field could improve the molecule orientation and crystallinity of these pipes.The maximum diffraction strength of the circular crystal plane of these pipes increased by 80% approximately and the maximum of the axial was about 100%.The crystaltinity of α-crystal increased from 65.69% to 66.87%, and β-crystal increased from 1.39% to 2.17%.

关 键 词：双向复合应力场 高密度聚乙烯/聚丙烯/短玻璃纤维管材取向 结晶 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]