A binary amorphous polymer blend consisting of polyvinyl chloride (PVC) and polymethyl methacrylate (PMMA) was studied with a rheo-optical characterization technique based on the combination of a near-infrared (NIR) spectrometer and a tensile testing machine. In rheo-optical NIR spectroscopy, tensile deformations were applied to polymers to induce the displacement of molecular chains while being probed by NIR light. The application of this technique was extended to a partially miscible amorphous polymer blend consisting of PVC and PMMA to demonstrate how it can be utilized to detect subtle but important deformation behavior. A change in the NIR spectral feature revealed that the initial deformation of the blend induces the reorientation of the PVC chains. A part of the PMMA connected to the PVC was tagged during the PVC deformation. Further deformation of the sample eventually resulted in necking propagation to the surrounding area.

使用基于近红外 (NIR) 光谱仪和拉伸试验机组合的流变光学表征技术研究了由聚氯乙烯 (PVC) 和聚甲基丙烯酸甲酯 (PMMA) 组成的二元无定形聚合物共混物。在流变光学 NIR 光谱中，拉伸变形被应用于聚合物以诱导分子链的位移，同时被 NIR 光探测。该技术的应用扩展到由 PVC 和 PMMA 组成的部分混溶无定形聚合物共混物，以展示如何利用它来检测微妙但重要的变形行为。NIR 光谱特征的变化表明共混物的初始变形导致 PVC 链的重新定向。在 PVC 变形过程中，部分连接到 PVC 的 PMMA 被标记。