Crystallization and melting behavior of polypropylene in ¦Â-PP/polyamide 6 blends containing PP-g-MA

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• 作者：Zhidan Lin ; ^{linzd@jnu.edu.cn} ; Zixian Guan ; Baofeng Xu ; Chao Chen ; Guangheng Guo ; Jiaxian Zhou ; Jiaming Xian ; Lin Cao ; Yueliang Wang ; Mingqing Li ; Wei Li
• 关键词：Polypropylene ; Polyamide 6 ; Nucleation ; Morphology ; Crystallization ; Polymer blends
• 刊名：Journal of Industrial and Engineering Chemistry
• 出版年：2013
• 出版时间：25 March, 2013
• 年：2013
• 卷：19
• 期：2
• 页码：692-697
• 全文大小：1003 K

文摘

In this research, we used a twin-screw extruder to melt and blend PP-g-MA compatibilizer with ¦Â-polypropylene (PP)/polyamide 6 (PA6). The influences of the PA6 and PP-g-MA contents in PP/PA6 blends on crystallization and melting behavior of PP phase and morphology were investigated. The results showed that, when PP-g-MA copolymer was added to the ¦Â form of nucleated PP/PA6 blends, the anhydride groups in PP-g-MA and PA6 terminal amine groups react to form PP-g-PA graft copolymer in a two-phase interface. This reduces the interfacial tension, improves the interfacial adhesion, and reduces the size of PA6 domains in the blend. The generated PP-g-PA graft copolymer wrapped PA6 phase and buried the anhydride groups of PP-g-MA. When the proportion of PP-g-MA and PA6 was between 0.5 and 0.75, there was no longer interfering to the formation of ¦Â-crystals in the PP phase. The content of ¦Â-crystal of PP phase in blends was found to reach as large as 85.9 % .