Orientational distribution of parent–daughter structure of isotactic polypropylene: a study using simultaneous synchrotron WAXS and SAXS
Orientational distribution of parent–daughter structure of isotactic polypropylene: a study using simultaneous synchrotron WAXS and SAXS
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DOI：
10.1007/s10853-008-2979-1
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发表时间：
2008-09
影响因子：
4.5
通讯作者：
P. Zhu;G. Edward
中科院分区：
文献类型：
--
作者：
P. Zhu;G. Edward
使用同步广角和小角 X 射线散射研究了注塑等规聚丙烯的分子和层状取向。为了获得相对于流动方向的有意义的分子取向程度，分别计算母体片层和子体片层的轴取向。薄材料的分子取向与层状取向一致。然而，厚材料层状取向的减少与分子取向的恒定程度相关，这表明母体层状之间沿流动方向存在内部滑移。
The molecular and lamellar orientations of injection-moulded isotactic polypropylene were investigated using simultaneous wide- and small-angle X-ray scatterings. In order to obtain the meaningful degree of molecular orientation with respect to the flow direction, the axis orientations of parent and daughter lamellae were separately calculated. The molecular orientation of thin material is consistent with the lamellar orientation. However, the decrease in the lamellar orientation of thick material is associated with a constant degree of molecular orientation, which would indicate an intra slip between parent lamellae along the flow direction.