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.
作者
刘立华
邢丹
刘冬莲
沈玉龙
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)
出处
《南开大学学报（自然科学版）》
CAS
CSCD
北大核心
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)
