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橡塑技术与装备
HINA R&P TECHNOLOGY AND EQUIPMENT

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The influence of accelerator types on the properties of chloroprene
rubber/cis-polybutadiene rubber blends

2
Li Liang , Li Zhicheng , Deng Tao 2
1
(1. Penglai Lingge Rubber & Plastic Products Co. LTD., Penglai 265608, Shandong, China;
2. Qingdao University of Science & Technology, Qingdao 266042, Shandong, China)
Abstract: This study, based on the ZnO/MgO–S composite vulcanization system, systematically
investigated the effects of five accelerators, including sulfenamides (CZ), thiazoles (DM), thiurams (TMTD,
TMTM), and tertiary amines (ACT-55), on the properties of chloroprene rubber/cis-polybutadiene rubber (CR/
BR) blends. The results showed that TMTD and TMTM significantly improved the vulcanization efficiency of the
blends, and the vulcanizates obtained from these systems exhibited the highest degree of vulcanization,
tensile strength (reaching 18.8 MPa), abrasion resistance, and optimal low-temperature resistance (with a low-
temperature brittle temperature of -44 ℃ ), but the retention of tensile strength after thermo-oxidative aging
was poor. The blends from the CZ system exhibited the highest elongation at break, while the blends from the
DM system showed the best retention of tensile strength after thermo-oxidative aging. The tertiary amine ACT-
55 had the shortest scorch time and the worst tensile properties at room temperature.
Key words: CR/BR; accelerator type; blending modification; vulcanization characteristics; physical and
mechanical properties
(R-03)

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