Preparation of Low‐Carbon Rapidly Vulcanizable Nitrile Rubber via Synergistic Effect of Emulsifier and Accelerator Assisted by Wet Mixing

ABSTRACT This study aims to reduce the environmental impact of traditional rubber vulcanization by proposing a greener process. Accelerators and emulsifiers were introduced into acrylonitrile‐butadiene rubber (NBR) using a wet mixing method after polymerization, thereby improving dispersion and efficiency. Two accelerator systems, RH‐EZ and RH‐ZTC, were constructed based on NBR LZ3305 and compared with the commercial fast‐curing NBR3445F. The results revealed distinct advantages for each system. The RH‐EZ system significantly enhanced the vulcanization rate (reducing t 90 ), with NBR/19RH‐EZ showing a 67% reduction over base LZ3305 and about 43% compared to NBR3445F. Conversely, the RH‐ZTC system excelled in processability and low‐temperature properties; NBR/13RH‐ZTC maintained 95% of its initial Mooney viscosity after 30 days, and NBR/17RH‐ZTC achieved a glass transition temperature of −25.4°C. Both systems exhibited excellent mechanical strength, crosslink density, and oil resistance. The Coran model confirmed that the RH‐EZ system effectively increased the E precursor and E crosslinking of the base LZ3305. This research provides a new pathway for preparing high‐performance, low‐carbon, and efficient vulcanized NBR and is expected to enable green and low‐carbon production of NBR.