Ethylene-propylene-diene rubber (EPDM) is a elastomer widely used in common industrial applications. EPDM can be shaped into sheets and employed as isolating material for roofing systems. In this study, scraps of EPDM from commercial, industrial and residential roofing systems were treated by combined thermo-mechanical and microwave devulcanization processes including peroxide of benzoyl (BPO). The devulcanized EPDM (Dev-EPDM) was characterized by cross-link density, Horikx plot, sol fraction content, SEM and TGA analysis. In order to assess the effect of the different factors implied (type of devulcanization process, temperature and amount of BPO), the Fractional Factorial Design (FFD) method has been applied. The obtained results show that, when thermo-mechanical and microwave methods are combined, produce an intense devulcanization effect. It was also found that the presence of BPO has significative influence in the devulcanization and that the effect of the temperature is related to the amount of BPO.

乙烯-丙烯-二烯橡胶（EPDM）是一种广泛用于普通工业应用的弹性体。EPDM可以成型为片材，并用作屋顶系统的隔离材料。在这项研究中，通过结合热机械和微波脱硫工艺（包括过氧化苯甲酰（BPO））处理了来自商业，工业和住宅屋面系统的EPDM废料。通过交联密度，Horikx图，溶胶分数含量，SEM和TGA分析表征了脱硫的EPDM（Dev-EPDM）。为了评估所暗示的不同因素（脱硫过程的类型，温度和BPO的量）的影响，已采用分数阶乘设计（FFD）方法。所得结果表明，当热机械方法和微波方法结合时，产生强烈的脱硫效果。