聚丙烯/纳米二氧化硅复合材料的制备与性能研究  

Research on Preparation and Properties of PP/Nano-SiO_2 Composites

作　　者：刘立华[1] 邢丹[2] 刘冬莲[1] 沈玉龙[1] Liu Lihua Xing Dan Liu Donglian Shen Yulong(Department of Chemistry, Tangshan Normal College, Tangshan 063000, China College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

机构地区：[1]唐山师范学院化学系,河北唐山063000 [2]青岛科技大学化工学院,山东青岛266042

出　　处：《南开大学学报（自然科学版）》2016年第6期1-7,共7页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：唐山师范学院重点研究项目(10B04);唐山师范学院教改项目(2014001031)

摘　　要：将硅烷偶联剂KH-560接枝到纳米SiO_2表面,用偶氮二异丁腈(AIBN)引发单体甲基丙烯酸甲酯(MMA)发生自由基聚合包覆纳米SiO_2,通过计算接枝率确定纳米SiO_2改性的最佳工艺条件,并对其进行红外表征.改性后的纳米SiO_2作为填料,通过双辊开炼制备聚丙烯基纳米复合材料,研究了填料添加量对复合材料的力学性能和结晶性能的影响.实验结果表明,纳米SiO_2改性的最佳工艺条件为:引发剂用量为2%,反应物质量比(单体MMA:纳米SiO_2)为2:1,改性时间为5 h;当聚丙烯与填料的质量比为100:3时,复合材料的拉伸强度达到最大值34.19 MPa,缺口冲击强度达到最大值2 kJ·m^(-2),与纯聚丙烯相比,拉伸强度和缺口冲击强度分别提高了25.7%和19.8%。The silane coupling agent was grafted to the surface of nano-SiO2 and then the particles were encapsulated with free radical polymerization of methylmethacrylate（MMA） initiated by azodiisobutyroni- trile（AIBN）. Through the calculation of nano-SiO2 grafting rate, the optimal modification conditions were determined. The as-prepared composites were characterized by FTIR. Polypropylene（PP） nanocomposites were prepared by compounding PP with nano-SiOz, which was superficially modified by polymethylmethac- rylate （PMMA） and was used as filler. Effect of filler content on mechanical and crystalline properties of PP/nano-composites was studied. The experimental results show that the optimal modification conditions are that the amount of AIBN is 2-5, the mass ratio of MMA to SiO2 is 2：1 and the modified time is 5 h. When the content of PP and filler is 100： 3, the tensile strength and impact strength of the composite are up to 34.19 MPa and 2 kJ. m-2 respectively, which increases by 25.7% and 19.805 respectively as against PP itself.

关 键 词：配准算法 空气质量评价 FRUCTOSE 李洪远 有机纳米管 表达纯化 模糊综合评判 Tianjin 带隙基准电压源 Perfect 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]