The curing system plays a vital role in designing rubber compounds for various industrial applications. Therefore, it is paramount to establish viable curing strategies for any new elastomer to explore its application potentials and commercial significance. Impacts of different curing regimes on the properties of a recently developed copolymer of chloroprene and acrylonitrile (acrylonitrile-chloroprene rubber, NCR) are reported here. Several primary accelerators (four from thiourea- and one from thiazolene product families) were used for curing the new rubber along with fixed loadings of zinc oxide (5 phr) and magnesium oxide (4 phr). Besides, curatives based on sulfur and peroxide were also evaluated. The influence of different curing systems on the rheological and physical properties of the copolymer was explored. It has been seen that the properties of the copolymer are considerably influenced by the different curing systems used. While ethylene thiourea (ETU) and propylene thiourea (PTU), as primary accelerators, provide the highest state of cure but may cause scorch. The use of trimethyl thiourea (TMU), on the other hand, results in the fastest rate and the most stable state of cure, good scorch safety, bin stability, and an overall good balance of properties. The sulfur-based crosslinking system induces good mechanical properties but causes limited bin stability, poor high-temperature compression set, and impaired heat resistance properties. As a curing agent, peroxide delivers the best bin stability in the rubber stocks but yields higher stiffness and limited aging resistance in the vulcanizates.

硫化系统在为各种工业应用设计橡胶化合物方面起着至关重要的作用。因此，为任何新型弹性体建立可行的固化策略以探索其应用潜力和商业意义至关重要。此处报告了不同固化方案对最近开发的氯丁二烯和丙烯腈共聚物（丙烯腈-氯丁二烯橡胶，NCR）性能的影响。几种主要促进剂（四种来自硫脲和一种来自噻唑酮产品系列）与固定负载的氧化锌 (5 phr) 和氧化镁 (4 phr) 一起用于硫化新橡胶。此外，还评估了基于硫和过氧化物的固化剂。探讨了不同固化体系对共聚物流变学和物理性能的影响。已经看到共聚物的性能受所使用的不同固化系统的显着影响。虽然乙烯硫脲 (ETU) 和丙烯硫脲 (PTU) 作为主要促进剂，可提供最高的固化状态，但可能会导致焦烧。另一方面，使用三甲基硫脲 (TMU) 可实现最快的固化速度和最稳定的状态、良好的焦烧安全性、料仓稳定性以及整体良好的性能平衡。硫基交联体系具有良好的机械性能，但会导致有限的箱稳定性、较差的高温压缩永久变形和降低的耐热性能。作为硫化剂，过氧化物可在橡胶原料中提供最佳的仓稳定性，但在硫化胶中产生更高的刚度和有限的耐老化性。