The objectives of this study were to develop a cost-effective, environmental-friendly, mechanochemical reclaiming process for compounded nitrile rubber (NBR) latex waste generated from the dipping and treatment plants of the glove manufacturing process and evaluate properties of reclaimed NBR and virgin NBR/reclaimed NBR blend compounds. Initially, compounded NBR latex waste containing NBR latex mixed with compounding ingredients was dried and reclaimed mechanically by varying the milling time from 0 min to 12.5 min at 2.5-min time interval. Properties such as initial plasticity, Mooney viscosity, swelling, and cross-link density of the mechanically reclaimed NBR samples were evaluated. Also, a series of mechanochemically reclaimed NBR samples were produced using urea and varying its amount from 0 phr to10 phr at 2 phr intervals and milling according to the selected milling time. The mechanochemically reclaimed NBR samples were also tested for the above properties. Finally, a reclaimed NBR sample was prepared by applying the best urea loading and the optimum milling time. Further, a series of virgin NBR/reclaimed NBR blend compounds was prepared by varying the reclaimed NBR from 0% to 70% at 10% interval. Cure characteristics of the above blend compounds were evaluated and compared with those of the 100% virgin NBR (control) compound. Initial plasticity and Mooney viscosity of mechanochemically reclaimed NBR revealed that urea is effective as a reclaiming agent for dried compounded NBR latex waste. Results in overall indicated that 5 min is the optimum milling time and 6 phr is the optimum loading of urea required to produce the best reclaimed NBR in terms of properties and energy consumption. Minimum torque and cure time of the 50:50 virgin NBR/reclaimed rubber blend compound were higher compared to the control, whereas scorch time, maximum torque, and cure rate index of the former were lower compared to the latter.

这项研究的目的是开发一种经济高效，环保，机械化学的回收工艺，用于处理手套制造过程中浸渍和处理厂产生的复合丁腈橡胶（NBR）乳胶废料，并评估再生NBR和纯NBR的性能/回收的NBR共混物。首先，将混有混合配料的NBR胶乳的NBR胶乳废料干燥，以2.5分钟的时间间隔将研磨时间从0分钟更改为12.5分钟，进行机械回收。评估了机械回收的NBR样品的性能，如初始可塑性，门尼粘度，溶胀和交联密度。也，使用尿素生产一系列机械化学回收的NBR样品，并以2 phr的间隔将其含量从0 phr更改为10 phr，并根据选择的研磨时间进行研磨。机械化学回收的NBR样品也进行了上述性能测试。最后，通过施加最佳尿素负载量和最佳研磨时间来制备回收的NBR样品。此外，通过以10％的间隔将再生的NBR从0％改变到70％来制备一系列原始的NBR /再生的NBR共混物。评价了上述共混化合物的固化特性，并将其与100％纯NBR（对照）化合物的固化特性进行了比较。机械化学回收的NBR的初始可塑性和门尼粘度表明，尿素可有效用作干燥的复合NBR乳胶废料的回收剂。总体结果表明，就性能和能耗而言，最佳研磨时间为5分钟，最佳负载量为6 phr，这是生产最佳再生NBR所需的尿素。与对照相比，原始50:50的NBR /再生橡胶共混物的最小扭矩和固化时间更长，而前者的焦化时间，最大扭矩和固化速率指数则低于对照。