为了实现废橡胶节能减排高品质再生,提出了低温靶向再生活化剂的设计理念,将含有—SH、—OH或—COOH的主再生活化剂(MS)与含有—OH或—COOH的次再生活化剂(有机酸A1)并用,在再生温度25～125℃下开展研究。结果表明:MS/A1具有协同效应,低温靶向再生胶拉伸强度和扯断伸长率分别达15.17MPa、360.65%,门尼黏度为79,达到了《再生橡胶通用规范》(GB/T 13460—2016)全胎胶粉优质品级R-T再生胶的性能要求,再生胶所含18项多环芳烃总含量小于20mg/kg,符合欧盟REACH法规(REACH-2009/48/EC)环保指标的要求。与高温再生工艺相比,低温靶向再生工艺节能20%～60%不等。

In order to realize energy saving,emission reduction and high-quality regeneration of waste rubber,this paper proposed the design concept of low-temperature targeted regeneration activator.The main regeneration activator (MS) containing —SH,—OH or —COOH was used simultaneously with the secondary regeneration activator (organic acid A1) containing —OH or —COOH,and the study was conducted at regeneration temperatures ranging from 25 to 125℃.It was found that MS/A1 had synergistic regeneration effects.The tensile strength and elongation at break of the recycled rubber reached 15.17MPa and 360.65%,respectively,and the Mooney viscosity was 79,which met the performance requirements of the “General Specification for Recycled Rubber”(GB/T 13460—2016) for full tire rubber powder grade R-T recycled rubber.The total content of 18 polycyclic aromatic hydrocarbons contained in recycled rubber was less than 20mg/kg,which met the requirements of the European REACH regulation (REACH-2009/48/EC) environmental protection index.Compared with the traditional high-temperature regeneration at 280℃,the low-temperature target regeneration process developed in this paper could save 20%～60% of energy.