Crystallization behavior of isotactic polypropylene/magnesium salt whisker composites modified by compatibilizer PP-g-MAH
Crystallization behavior of isotactic polypropylene/magnesium salt whisker composites modified by compatibilizer PP-g-MAH
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DOI：
10.1007/s10973-010-0958-7
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发表时间：
2011-02
影响因子：
4.4
通讯作者：
Zhiyong Wei;Wan-xi Zhang;Guangyi Chen;Jicai Liang;Ying Chang;Lian Liu;Pei Wang;Juncai Sun
中科院分区：
文献类型：
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作者：
Zhiyong Wei;Wan-xi Zhang;Guangyi Chen;Jicai Liang;Ying Chang;Lian Liu;Pei Wang;Juncai Sun
研究了增容剂PP-g-MAH改性等规聚丙烯（iPP）/镁盐晶须（MSW）复合材料在等温和非等温条件下的结晶行为。等温结晶分析表明，Avrami模型成功地描述了结晶过程。基于Lauritzen-Hoffman理论，在139 °C左右观察到iPP/MSW复合材料的状态转变，并计算了MSW和PP-g-MAH的加入降低了折叠表面自由能。MSW填料和PP-g-MAH增容剂的加入明显提高了iPP的结晶温度，加快了iPP的总结晶速率。结果表明，MSW诱导了β-iPP的形成，而PP-g-MAH抑制了β-iPP的形成。
Crystallization behavior of isotactic polypropylene (iPP)/magnesium salt whisker (MSW) composites modified by compatibilizer PP-g-MAH was studied under both isothermal and nonisothermal conditions. Analysis of the isothermal crystallization showed that the Avrami model successfully described the crystallization process. On the basis of Lauritzen–Hoffman theory, a regime transition was observed at about 139 °C for the iPP/MSW composite, and a decrease in the fold surface free energy was calculated with the addition of MSW and PP-g-MAH. The addition of MSW filler and PP-g-MAH compatibilizer distinctly improved the crystallization temperature and accelerated the total crystallization rate of iPP. It was observed that MSW induced the formation of β-iPP but PP-g-MAH suppressed the formation of β-iPP.