Study on side-chain liquid-crystalline copolymer as a new β-nucleating agent to induce phase behavior of isotactic polypropylene

被引:12
作者
Sun, Jing [1 ]
Hu, Jian-She [1 ]
Guo, Zhi-Xing [1 ]
Qi, Yang [1 ]
机构
[1] Northeastern Univ, Coll Sci, Shenyang 110004, Peoples R China
关键词
Isotactic polypropylene; beta-Nucleating agent; Phase behavior; Liquid-crystalline copolymer; SUPERMOLECULAR STRUCTURE; MELTING BEHAVIOR; ALPHA; MORPHOLOGY; GROWTH; POLYSTYRENE; MICROSCOPY; KINETICS; SHEAR; IPP;
D O I
10.1007/s00396-012-2783-y
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The nucleating activity of side-chain liquid-crystalline copolymer, as new beta-nucleating agent (LCP-NA3), towards isotactic polypropylene (iPP) was investigated by differential scanning calorimetry, wide-angle X-ray diffraction, and polarized optical microscopy. The effect of LCP-NA3 content, crystallization temperature, and time on the phase behavior of the iPP has been discussed. The results indicate that the relative content of beta-crystal mainly depends on LCP-NA3 content, crystallization temperature, and time. A high content of beta-crystal can be obtained by the combined effect of the optimum LCP-NA3 concentration, crystallization temperature, and time. The maximum content of beta-crystal reaches 0.63 when the LCP-NA3 content, crystallization temperature, and time are 0.8 wt%, 130 A degrees C, and 1 h, respectively. In addition, LCP-NA3 is identified to have dual nucleating ability for alpha- and beta-crystals under appropriate kinetic conditions.
引用
收藏
页码:735 / 742
页数:8
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