| PVC/SAN/ABS共混物的增韧机理 |
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| 引用本文： | 周超;张会轩;张明耀.PVC/SAN/ABS共混物的增韧机理[J].中国塑料,2009,23(11):30-33. |
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| 作者姓名： | 周超;张会轩;张明耀 |
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| 作者单位： | 长春工业大学化学工程学院 1长春工业大学化工学院2中国科学院长春应用化学研究所 长春工业大学 |
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| 摘 要： | 采用以乳液聚合的方法合成丙烯腈-丁二烯-苯乙烯共聚物(ABS)接枝粉料，将其与PVC、苯乙烯/丙烯腈共聚物（SAN）树脂熔融共混制备PVC/SAN/ABS共混物。恒定共混物中ABS含量，改变体系中SAN与PVC的比例从70.5/17.5至18/70。TEM分析表明，当共混物中SAN含量较多时，可以观察到银纹的存在；当共混物中PVC含量较多，可以观察到剪切屈服的发生；SEM分析发现，当共混物中PVC含量较多时，断裂表面出现了大量的空洞并伴随着基体的塑性流动；SAXS分析表明，当共混物中SAN的含量较多时，散射强度的增加是银纹的贡献能力增大的结果。
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| 关 键 词： | 聚氯乙烯 银纹 剪切屈服 丙烯腈-丁二烯-苯乙烯共聚物 苯乙烯/丙烯腈共聚物 |
| 收稿时间： | 2009-7-1 |
Toughening Mechanisms of PVC/SAN/ABS Blends |
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| Abstract: | ABS grafted copolymer was prepared by grafting styrene and acrylonitrile onto PB seed latex in emulsion polymerization, with which PVC/SAN/ABS blends were prepared. Keeping constant ABS fraction, the weight ratio of SAN to PVC varied from 70.5/17.5 to 18/70. Transmission electron microscope (TEM) showed that SAN component promoted the crazing and PVC the shear yielding. Scanning electron microscope (SEM) observation of the fractured surface revealed that voids and plastic flow were enhanced with increasing PVC content. Small angle X-scattering (SAXS) showed that SAN increased the scattering intensity, which was attributed to crazing. |
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| Keywords: | Poly(vinyl chloride) crazing shear yielding acrylonitrile-butadiene-styrene copolymer styrene-acrylonitrile copolymer |
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