| AIM 核壳增韧剂/ PVC 树脂共混体系性能 |
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| 引用本文： | 吴广峰,赵俊枫,杨海东,冯之榴,张会轩. AIM 核壳增韧剂/ PVC 树脂共混体系性能[J]. 复合材料学报, 2005, 22(3): 30-34 |
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| 作者姓名： | 吴广峰 赵俊枫 杨海东 冯之榴 张会轩 |
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| 作者单位： | 1.东北大学理学院, 沈阳 110004; |
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| 基金项目： | 国家自然科学基金(50273039)，长春工业大学科学研究基金资助(20040001) |
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| 摘 要： | 采用自制的丙烯酸丁酯接枝甲基丙烯酸甲酯核壳结构增韧剂( PBA-g-PMMA, AIM) 与聚氯乙烯( PVC) 树脂熔融共混, 制备了AIM/ PVC 共混物。研究了增韧剂粒子在PVC 中的分散和空洞化、AIM/ PVC 共混物的断裂与脆韧转变。结果表明, 球形的增韧剂粒子能够在PVC 树脂中均匀分散并对PVC 有很好的增韧作用, 在PVC 树脂中加入质量分数为615 %AIM 时, 冲击样条以韧性方式断裂; 样条冲击断面周围应力发白区域内产生了空洞。提出AIM 增韧PVC 的机理是橡胶粒子的空洞化与塑料基体剪切屈服协同作用。
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| 关 键 词： | 核壳粒子 丙烯酸酯抗冲击改性剂 脆韧转变 空洞化 |
| 文章编号： | 1000-3851(2005)03-0030-05 |
| 收稿时间： | 2004-05-28 |
| 修稿时间： | 2004-09-07 |
PROPERTIES OF CORE2SHELL MODIFIER AIM/ PVC BLENDS |
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| WU Guangfeng,Zhao Junfeng,Yang Haidong,FENG Zhiliu,Zhang Huixuan. PROPERTIES OF CORE2SHELL MODIFIER AIM/ PVC BLENDS[J]. Acta Materiae Compositae Sinica, 2005, 22(3): 30-34 |
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| Authors: | WU Guangfeng Zhao Junfeng Yang Haidong FENG Zhiliu Zhang Huixuan |
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| Affiliation: | 1.Institute of Science, Northeast University, Shenyang 110006, China;2.School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China;3.Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China |
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| Abstract: | Core-shell structured acrylate impact modifier (AIM) particles of poly (butyl acrylate) grafted poly (methyl methacrylate) (PBA-g-PMMA) were synthesized, which were used to prepare AIM/PVC blends by melting process. AIM particles distribution and its cavitations in PVC resin, the fracture and brittle-ductile transition of AIM/PVC blends were investigated. The results show that spherical AIM particles well disperse in the PVC matrix and toughen the PVC resin effectively. The impact test samples with 6.5% (mass fraction) AIM modifiers broke in ductile failure. It was found that cavitations are formed in the stress-whitened area near the fracture surface. The toughening mechanism of PVC is synergistic toughening by cavitations of the rubber particles and shear yielding of the matrix. |
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| Keywords: | core-shell particles acrylic impact modifier(AIM) brittle-ductile transition cavitation |
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