Journal
ANALYTICAL SCIENCES
Volume 37, Issue 9, Pages 1259-1264Publisher
JAPAN SOC ANALYTICAL CHEMISTRY
DOI: 10.2116/analsci.21P004
Keywords
Near-infrared spectroscopy; two-trace two-dimensional correlation spectroscopy; polymer blend; polyvinyl chloride; polymethyl methacrylate
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A binary amorphous polymer blend of PVC and PMMA was studied using rheo-optical NIR spectroscopy, revealing how changes in NIR spectral features can detect important deformation behaviors in the blend.
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.
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