Effect of Fiber Molecular Weight on the Interfacial Morphology of iPP Fiber/Matrix Single Polymer Composites
Effect of Fiber Molecular Weight on the Interfacial Morphology of iPP Fiber/Matrix Single Polymer Composites
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DOI：
10.1021/ma0521102
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发表时间：
2006-01
期刊：
影响因子：
5.5
通讯作者：
Xuping Sun;Huizhen Li;Xianzheng Zhang;Jingxia Wang;Dujing Wang;Shouke Yan
中科院分区：
文献类型：
--
作者：
Xuping Sun;Huizhen Li;Xianzheng Zhang;Jingxia Wang;Dujing Wang;Shouke Yan
通过将不同相对分子质量的iPP纤维引入其过冷或熔融的基体中，制备了iPP纤维/基体单聚合物复合材料，并用偏光显微镜研究了复合材料的界面形态。结果表明，界面超分子结构不仅受引入温度的影响，还与纤维的相对分子质量有关。在较低的纤维引入温度下，实心iPP纤维诱导α-iPP晶体生长，并在iPP纤维附近形成纯的α-iPP跨晶层，而与其相对分子质量无关。在较高的纤维引入温度下，完全熔融的高分子量或低相对分子质量的iPP纤维都会失去对iPP基质的成核能力。不完全熔融的iPP纤维产生的界面结构因纤维不同而不同。用纤维的不同松弛行为解释了这一现象，并对其进行了分析。
Through introducing the iPP fibers having different molecular weights into their supercooled or molten matrices, fiber/matrix single polymer composites of iPP have been prepared, and the obtained interfacial morphologies were studied by means of polarized light microscopy. It was found that the interfacial supramolecular structure was affected by not only the introduction temperature but also the molecular weight of the iPP fibers. At low fiber introduction temperatures, solid iPP fiber induces the growth of α-iPP crystals and results in the formation of pure α-iPP transcrystallization layer in the vicinity of iPP fiber regardless of its molecular weight. At high fiber introduction temperatures, completely molten iPP fiber, with either high or low molecular weight, loses its nucleation ability toward iPP matrix. The interfacial structure induced by incomplete molten iPP fibers is different from fiber to fiber. This has been explained in terms of different relaxation behavior of the fiber, which has been f...