植物油促进废轮胎橡胶中炭黑迁移及其增强效果。

Vegetable derived-oil facilitating carbon black migration from waste tire rubbers and its reinforcement effect.

作者信息

Song Pan, Wan Chaoying, Xie Yanling, Formela Krzysztof, Wang Shifeng

机构信息

Department of Polymer Science and Engineering, Shanghai Key Lab. of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China.

International Institute for Nanocomposites Manufacturing (IINM), WMG, University of Warwick, CV4 7AL, UK.

出版信息

Waste Manag. 2018 Aug;78:238-248. doi: 10.1016/j.wasman.2018.05.054. Epub 2018 Jun 7.

DOI:10.1016/j.wasman.2018.05.054

PMID:32559909

Abstract

Three dimensional chemically cross-linked polymer networks present a great challenge for recycling and reutilization of waste tire rubber. In this work, the covalently cross-linked networks of ground tire rubber (GTR) were degraded heterogeneously under 150 °C due to the synergistic effects of the soybean oil and controlled oxidation. The degradation mechanism was discussed using Horikx theory and Fourier transformation infrared spectroscopy (FTIR). The results showed that the structural evolution of sol and gel parts, which indicated that the sols consisted of degraded GTR chains with low molecular weight, while the gels were mainly composed of bound rubber coated carbon black, which are separated from the cross-linked network of GTR in a high degradation degree. The degraded GTR compound demonstrated an excellent reinforcing effect on solution styrene-butadiene rubber (SSBR), due to the presence of core-shell structured carbon black. This work provide an efficient and economic approach to degrade GTR and transform it into useful products.

摘要

三维化学交联聚合物网络对废旧轮胎橡胶的回收再利用提出了巨大挑战。在这项工作中，由于大豆油和可控氧化的协同作用，磨碎轮胎橡胶（GTR）的共价交联网络在150℃下发生非均相降解。利用霍里克斯理论和傅里叶变换红外光谱（FTIR）对降解机理进行了探讨。结果表明，溶胶和凝胶部分的结构演变表明，溶胶由低分子量的降解GTR链组成，而凝胶主要由包覆炭黑的结合橡胶组成，在高降解程度下它们从GTR的交联网络中分离出来。由于存在核壳结构的炭黑，降解后的GTR化合物对溶液丁苯橡胶（SSBR）表现出优异的增强效果。这项工作提供了一种有效且经济的方法来降解GTR并将其转化为有用的产品。