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首页> 外文期刊>Macromolecules >THEORETICAL ESTIMATION OF SEGMENTAL ORIENTATION IN DEFORMED POLYMERIC NETWORKS USING A LATTICE MODEL AND APPLICATION TO ORIENTATION OF AMORPHOUS CHAIN SEGMENTS OF POLY(ETHYLENE TEREPHTHALATE) AND ORIENTED CRYSTALLIZATION OF POLYETHYLENE
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THEORETICAL ESTIMATION OF SEGMENTAL ORIENTATION IN DEFORMED POLYMERIC NETWORKS USING A LATTICE MODEL AND APPLICATION TO ORIENTATION OF AMORPHOUS CHAIN SEGMENTS OF POLY(ETHYLENE TEREPHTHALATE) AND ORIENTED CRYSTALLIZATION OF POLYETHYLENE

机译：基于格模型的变形聚合物网络中段取向的理论估计及其在聚乙烯（甲基对苯二甲酸）无链链段的取向和聚乙烯的定向结晶中的应用

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The orientation distribution of chain segments in a uniaxially deformed polymer film has been estimated theoretically as a function of draw ratio using a lattice model similar to the one proposed by Erman et al. The model of Erman et al. was somewhat modified to compare the theoretical results with experimental ones. In doing so, the preferred axis associated with the orientation of segments was chosen along the direction between the two successive cross-link points, and the orientation of the preferred axis was assumed to behave in an affine fashion under elongation. The treatment was formulated in terms of the orientation distribution function with respect to the stretching direction by the application of the Legendre addition theorem. Numerical calculations were carried out to study the mechanism of the orientation of amorphous chain segments of poly(ethylene terephthalate) (PET) films, as well as oriented crystallization of polyethylene (PE) films. X-ray diffraction measurements were done to obtain the orientation distribution functions for PET and PE drawn films. The calculated orientation distribution functions were in good agreement with those observed experimentally. [References: 28]
机译：使用类似于Erman等人提出的晶格模型，已理论上估计了单轴变形聚合物膜中链段的取向分布与拉伸比的关系。 Erman等人的模型。进行了一些修改，以将理论结果与实验结果进行比较。这样做时，沿着两个连续的交联点之间的方向选择与段的方向相关联的优选轴，并且假定该优选轴的方向在伸长下表现出仿射的方式。通过应用勒让德加定理，根据相对于拉伸方向的取向分布函数来制定处理方法。进行了数值计算，以研究聚对苯二甲酸乙二醇酯（PET）薄膜的无定链链段的取向以及聚乙烯（PE）薄膜的定向结晶的机理。进行X射线衍射测量以获得PET和PE拉伸薄膜的取向分布函数。计算出的取向分布函数与实验观察到的吻合良好。 [参考：28]

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