SIS及其MAH接枝物改性PS/纳米CACO_3复合材料的力学性能  

The Mechanical Performance of PS/Nano-CaCO_3 Composites Modified by Maleic Anhydride Grafted Styrene-Isoprene-Styrene Triblock Copolymer

作　　者：李谷[1] 麦堪成[1] 王玉海[1] 冯开才[1] 

机构地区：[1]中山大学化学与化学工程学院∥教育部聚合物复合材料及功能材料重点实验室,广东广州510275

出　　处：《中山大学学报（自然科学版）》2006年第1期58-60,共3页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：广东省自然科学基金重点资助项目(021731);高等学校博士学科点专项科研基金资助项目;广东省科技攻关计划资助项目(2003B10503)

摘　　要：将苯乙烯与异戊二烯嵌段共聚物(SIS)改性PS/纳米CACO3复合材料,材料冲击强度随着SIS用量的增加而提高。PS/纳米CACO3/SIS(质量百分比为100/5/8)复合材料的缺口和无缺口冲击强度分别由PS的1.61和6.35 KJ/M2提高到2.21和7.59 KJ/M2。熔融接枝马来酸酐MAH后,材料冲击强度进一步提高。MAH接枝率为3.08%的PS/纳米CACO3/SIS-MAH(100/5/6)复合材料的无缺口冲击强度由SIS改性材料的7.69 KJ/M2提高到11.69 KJ/M2。随着SIS及SIS-MAH的用量的增加,复合材料的拉伸强度下降,断裂伸长率明显提高。动态力学性能表明纳米CACO3对PS/SIS具有一定的增强作用。Styrene-isoprene-styrene triblock copolymer （SIS） and its maleic anhydride （MAH） -grafted polymer were used to modified PS/nano-CaCO3 composites. The impact strength of the composites had a great improvement due to the flexile interface of SIS between PS and CaCO3. PS/nano-CaCO3/SIS-MAH （100/5/6） with 3.08% MAH exhibited higher non-touched impact strength, namely 11.69 kJ/m^2, co modified composites. The tensile strength of SIS and SIS-MAH modified increase of SIS or SIS-MAH content, but elongation at break improved mechanical measurement showed that nano-CaCO3 had some stiffen effect on mpared to 7.69 kJ/m^2 of the pure SIS PS/nano-CaCO3 decreased with the apparently. The results of dynamic PS/SIS blend.

关 键 词：SIS PS 纳米CACO3 冲击强度 拉伸强度 

分 类 号：O631[理学—高分子化学]