| 烷基化纳米SiO2/MMA乳液聚合物的表征及对PC的改性效果 |
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| 引用本文： | 钱翼清,赵平,王卫华.烷基化纳米SiO2/MMA乳液聚合物的表征及对PC的改性效果[J].复合材料学报,2003,20(1):79-84. |
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| 作者姓名： | 钱翼清 赵平 王卫华 |
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| 作者单位： | 南京工业大学,材料科学与工程学院,南京,210009 |
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| 基金项目： | 高分子材料工程国家重点实验室资助项目(1998); 江苏省科委资助项目(BJ98062) |
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| 摘 要： | 用TEM,FTIR分析研究了烷基化纳米SiO2 /MMA乳液聚合产物的结构。结果表明,乳液聚合产物的粒子基本呈球形,由核壳组成,中心为SiO2核,外围为PMMA壳,核壳之间存在化学键。并在适量第三组分配合下能大幅度提高PC的韧性、加工流动性及耐热性,还研究了其增韧机理。
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| 关 键 词： | 纳米SiO2 MMA 乳液聚合产物 结构表征 PC改性 增韧机理 |
| 文章编号： | 1000-3851(2003)01-0079-06 |
| 收稿时间： | 2001-07-13 |
| 修稿时间： | 2001年7月13日 |
CHARACTERIZATION OF EMULSION POLYMERIC PRODUCT OF ALKYL -NANO-SiO2/MMA AND MODIFYING PC WITH IT |
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| QIAN Yiqing,ZHAO Ping,WANG Weihua.CHARACTERIZATION OF EMULSION POLYMERIC PRODUCT OF ALKYL -NANO-SiO2/MMA AND MODIFYING PC WITH IT[J].Acta Materiae Compositae Sinica,2003,20(1):79-84. |
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| Authors: | QIAN Yiqing ZHAO Ping WANG Weihua |
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| Affiliation: | College of Materials Science and Engineering, Nanjing University of Technology, Nanjing210009,China |
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| Abstract: | Surface of nano-SiO2 particles was covered with PMMA by emulsion polymerization to prevent their reunion. The structures of emulsion polymeric products of alkyl-nano-SiO2/MMA were characterized by TEM and FTIR. The results indicate that the particles of emulsion polymeric products are approximate ball in shape and that the particle consists of centered core(SiO2) and shell (PMMA) and that chemical bonds exist between the core and shell of alkylaed-nano-silica/PMMA. The toughness, process flowability and heat resistance of PC were notably raised by core-shell particles of alkylated-nano-silica/PMMA with the cooperation of a third component.Its toughening mechanism was studied with the newest theory of multi-layer crack extension. |
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| Keywords: | nano-silica MMA emulsion polymeric product structure characterization PC modification toughening mechanism |
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