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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Free volumes in UV-cured polymers based on acrylate oligomers
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Free volumes in UV-cured polymers based on acrylate oligomers

机译：基于丙烯酸酯低聚物的紫外线固化聚合物的自由体积

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摘要

Polymerization in polymers based on acrylate oligomers was caused by exposure to ultraviolet light. Polymer specimens with different ultraviolet tight exposure times have been investigated by positron annihilation lifetime spectroscopy (PALS). The longest lifetime, tau (3), in observed lifetime spectra for positrons was associated with the pick-off annihilation of ortho-positronium (o-Ps) trapped by free volume in the structure. The aim of this paper was to investigate the influence of the time of UV exposure on free volume sizes in two different polymers based on acrylate oligomers. UV exposure time influences the free volume size: longer time reduces it. The concentration of the free volumes is independent of UV exposure time. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 12]
机译：基于丙烯酸酯低聚物的聚合物的聚合是由于暴露于紫外线引起的。已通过正电子an没寿命光谱（PALS）研究了具有不同的紫外线紧曝光时间的聚合物样品。在观察到的正电子寿命谱中，最长寿命tau（3）与结构中自由体积所捕获的邻正电子（o-Ps）的an灭相关。本文的目的是研究两种基于丙烯酸酯低聚物的聚合物中紫外线暴露时间对自由体积尺寸的影响。紫外线暴露时间会影响自由体积的大小：更长的时间会减少自由体积的大小。自由体积的浓度与紫外线暴露时间无关。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：12]

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