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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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水辅助注塑PP/SAN共混物制品中横晶形成机理的研究
DOI: 10.3724/SP.J.1105.2012.11364, PP. 825-830
Keywords: 水辅助注塑,聚丙烯,丙烯腈-苯乙烯共聚物,横晶
Abstract:
采用水辅助注塑(WAIM)设备,在不同的注水压力和熔体温度下制备了4种质量比(98/2,96/4,94/6和92/8)的聚丙烯/丙烯腈-苯乙烯共聚物(PP/SAN)共混物制品.采用偏光显微镜(POM)和扫描电子显微镜(SEM),研究了WAIMPP/SAN共混物制品的结晶形态和相形态.研究发现,高压水的穿透作用所引起的强剪切和快速冷却可诱导SAN在PP基体中原位成纤,并诱导PP在SAN纤维表面形成大量的晶核而最终形成横晶.SAN含量为4wt%时,所形成横晶的含量随水压的提高而增加,随温度的降低而大幅增加.当SAN含量较低(2wt%)时,制品中没有横晶形成.
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