橡胶及其复合材料的电子束加工

IF 1.1 4区 工程技术 Q4 ENGINEERING, CHEMICAL
A. M. Shanmugharaj, V. Vijayabaskar, A. Bhowmick
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引用次数: 1

摘要

摘要电子束(EB)处理原始和填充的聚合物材料被认为是开发具有改进的物理和化学性能的聚合物或复合材料系统的三维(3D)网络结构的最可行的技术之一。在没有任何化学试剂或热量的帮助下,由电子束改性过程中产生的宏观自由基的合并引起的接枝或交联过程是聚合物系统中3D网络形成的原因。电子束辐射技术具有快速、清洁、精确等优点,在高分子化合物的交联中发挥着至关重要的作用。然而,在聚合物的电子束处理过程中,根据用于处理的辐射剂量水平,同时发生两个过程,即交联和断链。本文综述了在存在和不存在辐射敏化剂的情况下,辐射剂量对各种软基质(如弹性体、乳胶、热塑性弹性体及其各自的填充体系)中的交联和结构形成的作用。本文详细讨论了EB加工弹性体及其复合材料在力学和动态力学性能、热稳定性、加工特性等方面的显著改进。特别是,与传统的交联技术相比,EB处理的原始橡胶和填充橡胶的性能改进进行了批判性的综述。本文还讨论了通过基于Charlesby–Pinner方程计算交联与断裂比来确定原始橡胶和填充橡胶中辐射剂量诱导交联的水平。最后,重点介绍了作者开发的电子束固化技术在电缆和密封行业的应用情况。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Electron beam processing of rubbers and their composites
Abstract Electron beam (EB) processing of pristine and filled polymeric materials is considered as one of the most viable techniques in the development of three-dimensional (3D) network structures of polymeric or composite systems with improved physical and chemical properties. The grafting, or the crosslinking process induced by the merging of the macro free radicals generated during the electron beam modification without the aid of any chemical agent or heat, is responsible for the formation of the 3D networks in polymeric systems. Owing to its distinct advantages such as fast, clean and precise, electron beam (EB) radiation technology takes up a vital role in the crosslinking of polymeric compounds. However, during the course of electron beam treatment of polymers, two processes viz., crosslinking and chain scission take place simultaneously, depending on the level of radiation dose used for the processing. The present paper reviews the role of irradiation dose in the presence and absence of radiation sensitizer on the crosslinking and structure formation in a wide variety of soft matrices such as elastomers, latexes, thermoplastic elastomers and their respective filled systems. Notable improvements in mechanical and dynamic mechanical properties, thermal stability, processing characteristics, etc., of the EB processed elastomers and their composites are discussed elaborately in the paper. Specially, the property improvements observed in the EB processed pristine and filled rubbers in comparison to the conventional crosslinking technology are critically reviewed. The level of radiation dose inducing crosslinking in both pristine and filled rubbers, determined by calculating crosslink to scission ratio on the basis of Charlesby–Pinner equation is also discussed in the paper. Finally, the application aspects of electron beam curing technology with special emphasis to cable and sealing industries as developed by one of the authors are highlighted in the paper.
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来源期刊
International Polymer Processing
International Polymer Processing 工程技术-高分子科学
CiteScore
2.20
自引率
7.70%
发文量
62
审稿时长
6 months
期刊介绍: International Polymer Processing offers original research contributions, invited review papers and recent technological developments in processing thermoplastics, thermosets, elastomers and fibers as well as polymer reaction engineering. For more than 25 years International Polymer Processing, the journal of the Polymer Processing Society, provides strictly peer-reviewed, high-quality articles and rapid communications from the leading experts around the world.
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