Surface graft copolymerization of poly(methyl methacrylate) onto waste tire rubber powder through ozonization
Surface graft copolymerization of poly(methyl methacrylate) onto waste tire rubber powder through ozonization
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DOI：
10.1002/app.34329
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发表时间：
2011-11
影响因子：
3
通讯作者：
P. Fan;Canhui Lu
中科院分区：
文献类型：
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作者：
P. Fan;Canhui Lu
轮胎研磨为回收废橡胶提供了一个很好的机会，因为细的废轮胎橡胶颗粒可以用作热塑性、弹性体和热固性共混物的填料和性能改进剂。然而，由于WTR表面缺乏活性位点，WTR粉末与基体之间的附着力较差。本文对废轮胎橡胶（WTR）粉进行了臭氧化处理，在WTR表面产生了一些“不动”的活性点（过氧化氢基团）。利用WTR表面过氧化氢基团分解产生的自由基，在WTR粉末表面引发甲基丙烯酸甲酯（MMA）接枝聚合。实验结果表明，MMA成功地接枝到WTR表面。MMA接枝WTR （MMA-g-WTR）的亲水性得到改善。过氧化氢基团浓度和接枝度均随臭氧化时间的延长而增加。随着聚合时间和聚合温度的增加，接枝度增大。©2011 Wiley期刊公司高分子学报，2011
Grinding of tires offers a promising opportunity for recycling waste rubber because fine waste tire rubber particle may be used as fillers and property modifiers in thermoplastic, elastomer, and thermoset blends. However, due to the lack of reactive sites on the WTR surface, the adhesion between WTR powder and matrix is poor. In this article, ozonization of waste tire rubber (WTR) powder was performed to produce some “immobile” reactive points (hydroperoxide groups) on the WTR surface. The free radical generated by the decomposition of hydroperoxide groups on WTR surface, was used to initiate graft polymerization of methyl methacrylate (MMA) onto the surface of WTR powder. The experimental results showed that MMA was successfully grafted onto the surface of WTR. The hydrophilicity of the MMA grafted WTR (MMA-g-WTR) was improved. The concentration of hydroperoxide groups and the graft degree were both increased with ozonization time. With increasing of polymerization time and polymerization temperature, the grafting degree increased. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011