赤泥/磷石膏对PE-HD性能影响  

Effects of Red Mud/Phosphogypsum on Properties of PE-HD

作　　者：吴良喜 雷阳 邹笑雨 代志希 刘玉飞[1] 张凯 何敏[1] Wu Liangxi;Lei Yang;Zou Xiaoyu;Dai Zhixi;Liu Yufei;Zhang Kai;He Min(Department of Polymer Material and Chemical,College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China;Material Innovation Base of Guizhou Province,Guiyang,550014,China)

机构地区：[1]贵州大学材料与冶金学院材料与化工系,贵阳550025 [2]贵州省材料创新基地,贵阳550014

出　　处：《工程塑料应用》2022年第8期17-23,共7页Engineering Plastics Application

基　　金：贵州省科技支撑计划项目(黔科合支撑[2020]4Y045号);贵州省教育厅重点领域项目(黔教合KY字[2021]311);国家重点研发计划项目(2018YFC1903501)。

摘　　要：采用熔融共混法制备高密度聚乙烯(PE-HD)/赤泥(RM)/磷石膏(PG)复合材料。通过力学测试、差示扫描量热、热变形温度、扫描电子显微镜等分析测试方法研究了RM/PG二元协同粉体粒径、RM/PG二元协同粉体填充量对PE-HD/RM/PG复合材料性能的影响。结果表明,不同粒径RM/PG二元协同粉体对复合材料的力学性能影响相差不大,但随着RM/PG二元协同粉体填充量的增加能提高复合材料的拉伸强度、弯曲强度和弯曲弹性模量,当RM/PG二元协同粉体粒径为6.5μm,质量分数为40%时,其复合材料的综合性能最好,较纯PE-HD分别提高了12.2%,48.1%和95%。RM/PG二元协同粉体对PE-HD有异相成核作用,使PE-HD/RM/PG复合材料的结晶度、热变形温度分别提高了13%,49.1%,且小粒径的RM/PG二元协同粉体在PE-HD基体中分散得更好,对PE-HD分子链运动的阻碍作用更大。High-density polyethylene(PE-HD)/red mud(RM)/phosphogypsum(PG)composites were prepared by melt blending.Through mechanical testing,differential scanning calorimetry(DSC),heat distortion temperature(HDT),scanning electron microscope(SEM)and other analytical tests,the particle size of RM/PG binary synergistic powder,the RM/PG binary synergy powder were studied.Effect of powder loading on the properties of PE-HD/RM/PG composites were studied.The research results show that the mechanical properties of the composites are not significantly affected by the RM/PG binary synergistic powders with different particle sizes,but the tensile strength,flexural strength and flexural modulus of the composites can be improved with the increase of the filling amount of the RM/PG binary synergistic powders.In terms of flexural strength and flexural modulus,when the particle size of the RM/PG binary synergistic powder is 6.5μm and the filling amount is 40%,the comprehensive performance of the composite is the best,which is 12.2%,48.1%and 95%higher than that of pure PE-HD,respectively.The RM/PG binary synergistic powder has a heterogeneous nucleation effect on PE-HD,which increases the crystallinity and thermal deformation temperature of PE-HD/RM/PG composites by 13%and 49.1%,respectively.The RM/PG binary synergistic powder disperses better in the PE-HD matrix and hinders the movement of the PE-HD molecular chain more.

关 键 词：磷石膏 赤泥 高密度聚乙烯 力学性能 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]