null检测 | 聚合物冷凍研磨-用同步辐射加速器红外显微技术来表征固态聚合体混核物的异质特征-上海漾盟仪器有限公司

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Abstract Immiscible polymers, including polystyrene (PS) and polyethylene terephthalate (PET), were blended in the solid state via mechanical attrition, the first step of a near net-shape manufacturing (NNSM) technique. Subsequent analysis via Fourier Transform Infrared Spectroscopy (FT-IR) with synchrotron radiation successfully distinguished between blend components. Characteristic absorbance peaks for each polymer allowed both qualitative and quantitative mapping within prepared samples. Reproducible area maps were created for 50/50 blends of polymethylmethacrylate (PMMA)/PET and PET/PS, which exhibited areas of macroscopic phase separation. Fluctuations in blend concentration were particularly evident for PS/PMMA. However, spatial resolution was shown to limit the detection of heterogeneities. Further modifications with the synchrotron IR apparatus will improve resolution and allow for the direct comparison of NNSM-processed and melt-blended polymers. © 2006 Elsevier B.V. All rights reserved. Keywords: Solid-state blending; Microspectroscopy; Miscibility; Polymers; Characterization methods

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