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首页> 外文期刊>Journal of Applied Polymer Science >Optothermal properties of fibers - 20 - relation between physical structure and mechanical properties of cold drawn polypropylene fibers
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Optothermal properties of fibers - 20 - relation between physical structure and mechanical properties of cold drawn polypropylene fibers

机译：纤维的光热性能-20-冷拉聚丙烯纤维物理结构与力学性能的关系。

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The structure of annealed polypropylene (PP) fibers is studied interferometrically using two-beam Pluta polarizing interference microscope connected to a device to study the draw ratio with birefringence changes dynamically. Relations of drawing changes with some optical and physical parameters are given. Evaluation of average work per chain, work per unit volume, reduction in entropy caused by elongation, and the work stored in the body as strain energy were determined. Also the resulting optical data were utilized to evaluate the orientation factor, the orientation angle, the virtual refractive index, and the number of molecules per unit volume. The value of (Δα/3αo), which depends upon the molecular structure of the polymer, remains constant. Relations between the physical and optical parameters with different strains are given for these fibers. The generalized Lorentz-Lorenz equation given by de Vries is used to determine polypropylene fiber structural parameters. Comparison between Hermans optical orientation function formula and the corrected formula by de Vries are given.
机译：使用与设备相连的两光束Pluta偏振干涉显微镜干涉测量法研究了退火聚丙烯（PP）纤维的结构，以动态研究具有双折射变化的拉伸比。给出了图纸变化与某些光学和物理参数的关系。确定了每条链的平均功，每单位体积的功，伸长引起的熵降低以及作为应变能存储在体内的功的评估。所得的光学数据也用于评估取向因子，取向角，虚拟折射率和每单位体积的分子数。 （Δα/3αo）的值取决于聚合物的分子结构，保持恒定。对于这些纤维，给出了具有不同应变的物理和光学参数之间的关系。 de Vries给出的广义Lorentz-Lorenz方程用于确定聚丙烯纤维的结构参数。给出了Hermans光学取向函数公式与de Vries校正后的公式的比较。

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