In this paper the toughening mechanism of PVC/CPE filled with nanoscale SiO 2 and the effects of nanoscale SiO 2 and common SiO 2 contents on properties of PVC/CPE were studied.The experimental results showed PVC/CPE/...In this paper the toughening mechanism of PVC/CPE filled with nanoscale SiO 2 and the effects of nanoscale SiO 2 and common SiO 2 contents on properties of PVC/CPE were studied.The experimental results showed PVC/CPE/SiO 2 had excollent notched impact strength and tensile strength when nano SiO 2 content was 6 per cent to 12 per cent.Local SiO 2 had no obvious toughening effect on PVC/CPE,but made the tensile strength and elongation at break of PVC/CPE decreased obviously.展开更多
采用多种方法对纳米 Si O2 粒子进行表面处理 ,并深入探讨了纳米 Si O2 粒子的分散机理。通过熔融共混法制备了 PP/纳米 Si O2 复合材料 ,对此复合材料进行了力学性能测试。结果表明 :经适当处理的纳米 Si O2 粒子能均匀地分散在聚丙烯...采用多种方法对纳米 Si O2 粒子进行表面处理 ,并深入探讨了纳米 Si O2 粒子的分散机理。通过熔融共混法制备了 PP/纳米 Si O2 复合材料 ,对此复合材料进行了力学性能测试。结果表明 :经适当处理的纳米 Si O2 粒子能均匀地分散在聚丙烯中 ,对 PP的力学性能有显著的改善作用 ,而且对 PP的结晶有明显的异相成核作用。纳米 Si O2 在用量为 2 %时可以使 PP的缺口冲击强度提高 1倍 ,同时拉伸强度也有很大提高。展开更多
PTFE /nano-SiO2 composites were prepared and the effect of nano-SiO2 by surface pre-treatment of nano-SiO2 ;selecting special macromolecule dispersing agent and master batch manufacturing technogy.The results showed t...PTFE /nano-SiO2 composites were prepared and the effect of nano-SiO2 by surface pre-treatment of nano-SiO2 ;selecting special macromolecule dispersing agent and master batch manufacturing technogy.The results showed the filling of nano-SiO2 decreased the breaking elongation of PTFE composites,but increased the tensile strength and the hardness of the materical.When the content of nano-SiO2 was 7% by mass, PTFE / nano-SiO2 composites had good mechanical properties.with the increase of nano-SiO2 content the PTFE composites changed from tuough and plastic into hard brittle material.展开更多
文摘In this paper the toughening mechanism of PVC/CPE filled with nanoscale SiO 2 and the effects of nanoscale SiO 2 and common SiO 2 contents on properties of PVC/CPE were studied.The experimental results showed PVC/CPE/SiO 2 had excollent notched impact strength and tensile strength when nano SiO 2 content was 6 per cent to 12 per cent.Local SiO 2 had no obvious toughening effect on PVC/CPE,but made the tensile strength and elongation at break of PVC/CPE decreased obviously.
文摘PTFE /nano-SiO2 composites were prepared and the effect of nano-SiO2 by surface pre-treatment of nano-SiO2 ;selecting special macromolecule dispersing agent and master batch manufacturing technogy.The results showed the filling of nano-SiO2 decreased the breaking elongation of PTFE composites,but increased the tensile strength and the hardness of the materical.When the content of nano-SiO2 was 7% by mass, PTFE / nano-SiO2 composites had good mechanical properties.with the increase of nano-SiO2 content the PTFE composites changed from tuough and plastic into hard brittle material.