Nanoparticles of polystyrene/α Fe 2O 3 composites were prepared by method of insertion in sodium dodecylbenzene sulfonate(SDBS) micellar system. The orange α Fe 2O 3 particles of about 6 nm were first prepared from ...Nanoparticles of polystyrene/α Fe 2O 3 composites were prepared by method of insertion in sodium dodecylbenzene sulfonate(SDBS) micellar system. The orange α Fe 2O 3 particles of about 6 nm were first prepared from 0 25 mol/L FeCl 2 and (NH 3) 2CO 3 in 0.1% surfactant solution at pH=4, 105 ℃ for 10 h. The title nanoparticles were prepared then in conditions of SDBS∶ styrene∶H 2O(mass fraction)=0 1∶1∶9, 85 ℃, 8 h, using ammonium persulfate(APS) as an initiator. The composite nanoparticles sized in 20～50 nm and showed magnetic property.展开更多
文摘Nanoparticles of polystyrene/α Fe 2O 3 composites were prepared by method of insertion in sodium dodecylbenzene sulfonate(SDBS) micellar system. The orange α Fe 2O 3 particles of about 6 nm were first prepared from 0 25 mol/L FeCl 2 and (NH 3) 2CO 3 in 0.1% surfactant solution at pH=4, 105 ℃ for 10 h. The title nanoparticles were prepared then in conditions of SDBS∶ styrene∶H 2O(mass fraction)=0 1∶1∶9, 85 ℃, 8 h, using ammonium persulfate(APS) as an initiator. The composite nanoparticles sized in 20～50 nm and showed magnetic property.
文摘将天然胶乳包覆到交联聚苯乙烯刚性粒子(N-XPS)上,探讨了N-XPS和包覆剂用量对N-XPS／PP复合材料性能的影响,结果表明:当包覆剂用量为XPS的20％,N-XPS用量为PP的3％时,复合材料的弯曲强度提高30％, 简支梁与悬臂梁缺口冲击强度分别提高68％和88％。偏光显微镜观察到加入N-XPS的PP晶粒细化、界面模糊, 这一事实证明了N-XPS粒子与PP有好的相容性和诱导结晶成核作用。转矩流变仪测试结果表明:随N-XPS用量的增加,复合材料加料熔融的最大扭矩及物料最低温度有明显的下降,物料达最低温度后,温度增长速率减慢,130 s 后,温度增长的速率呈上升趋势。
