Three kinds of nano composite particles were synthesized by seeded emulsion polymerization,which are high crosslinking poly(methyl methacrylate)/polystyrene (PMMA(HC)/PS),high crosslinking poly(methyl meth_acrylate)/l...Three kinds of nano composite particles were synthesized by seeded emulsion polymerization,which are high crosslinking poly(methyl methacrylate)/polystyrene (PMMA(HC)/PS),high crosslinking poly(methyl meth_acrylate)/low crosslinking poly(butyl acrylate)/polystyrene PMMA(HC)/PBA(LC)/PS and high cross-linking poly(methyl methacrylate)/poly(methyl methacrylate-styrene)/polystyrene(PMMA(HC)/P(MMA-St)/PS).Then the dry particles were molded or extruded to obtain the corresponding nanocomposites.Furthermore,the dispersion stability of nano phases in matrices was investigated during their processing.The results show that the coalescence mechanism of nano phase in these composites is different from that of binary immiscible polymer blends.展开更多
采用凝胶纺丝制备了氧化石墨烯(GO)改性的高强聚乙烯醇(PVA)纤维,研究了GO的含量、纺丝工艺对GO-PVA纤维性能的影响。通过红外光谱、热失重和热失重速率、差示扫描分析、X射线衍射等方法对GO-PVA纤维的结构与性能进行了研究。结果表明:G...采用凝胶纺丝制备了氧化石墨烯(GO)改性的高强聚乙烯醇(PVA)纤维,研究了GO的含量、纺丝工艺对GO-PVA纤维性能的影响。通过红外光谱、热失重和热失重速率、差示扫描分析、X射线衍射等方法对GO-PVA纤维的结构与性能进行了研究。结果表明:GO-PVA纤维具有更好的拉伸性能,当GO质量分数在0.1%的时候,GO-PVA纤维具有最好的拉伸性能,其最大拉伸倍数、强度和模量分别为41倍、15.6 c N/dtex和185 c N/dtex,比纯PVA纤维提高了36.7%、16.4%和79.6%。展开更多
基金supported by grants fromthe National Basic Research Program(973 Program)(2006CB606505)the Shanghai Leading Academic Discipline Project(B603)the Shanghai Fundamental Theory Program(07DJ14002)
文摘Three kinds of nano composite particles were synthesized by seeded emulsion polymerization,which are high crosslinking poly(methyl methacrylate)/polystyrene (PMMA(HC)/PS),high crosslinking poly(methyl meth_acrylate)/low crosslinking poly(butyl acrylate)/polystyrene PMMA(HC)/PBA(LC)/PS and high cross-linking poly(methyl methacrylate)/poly(methyl methacrylate-styrene)/polystyrene(PMMA(HC)/P(MMA-St)/PS).Then the dry particles were molded or extruded to obtain the corresponding nanocomposites.Furthermore,the dispersion stability of nano phases in matrices was investigated during their processing.The results show that the coalescence mechanism of nano phase in these composites is different from that of binary immiscible polymer blends.
文摘采用凝胶纺丝制备了氧化石墨烯(GO)改性的高强聚乙烯醇(PVA)纤维,研究了GO的含量、纺丝工艺对GO-PVA纤维性能的影响。通过红外光谱、热失重和热失重速率、差示扫描分析、X射线衍射等方法对GO-PVA纤维的结构与性能进行了研究。结果表明:GO-PVA纤维具有更好的拉伸性能,当GO质量分数在0.1%的时候,GO-PVA纤维具有最好的拉伸性能,其最大拉伸倍数、强度和模量分别为41倍、15.6 c N/dtex和185 c N/dtex,比纯PVA纤维提高了36.7%、16.4%和79.6%。