文章摘要
Effects of Accelerator Types and Carbon Black Content on Properties of CR
Received:March 07, 2020  Revised:March 07, 2020
DOI：10.12136/j.issn.1000-890X.2020.08.0602
Key Words: CR；accelerator；carbon black；vulcanization characteristics；physical property；thermogravimetry analysis
Author NameAffiliationE-mail
CHI Zhouxun CRRC Qingdao Sifang Rolling Stock Research Institute Co. ，Ltd chizhouxun.ss@crrcgc.cc 
ZHANG Zuoxin* CRRC Qingdao Sifang Rolling Stock Research Institute Co. ，Ltd 352734125@qq.com 
SUN Junping CRRC Qingdao Sifang Rolling Stock Research Institute Co. ，Ltd  
ZHU Penggang CRRC Qingdao Sifang Rolling Stock Research Institute Co. ，Ltd  
LI Nan CRRC Qingdao Sifang Rolling Stock Research Institute Co. ，Ltd  
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Abstract:
      The effects of accelerator type and carbon black content on the properties of chloroprene rubber（CR） were studied. The results showed that the t10 of the compound with N，N′ -diethyl thiourea（diethylthiourea for short） was the shortest，while that of the compound with tetramethyl thiourea was the longest.The t90 of the compound with diethyl thiourea was the shortest，while that of the compound with 1，2-ethylidene thiourea （ethylidene thiourea for short ） or tetramethyl thiourea was longer. The vulcanization degree of the compound with diethyl thiourea was the highest，while that of the compound with N，N，N′ -trimethyl thiourea（trimethyl thiourea for short） or tetramethyl thiourea was lower.The modulus at 100% elongation of the compound with ethylidene thiourea was the highest，and the elongation at break was the lowest. The modulus at 100% elongation of the compound with tetramethyl thiourea was the lowest，and the elongation at break was the highest. The compression set of the compound with trimethyl thiourea was the smallest. The Mooney viscosity and hardness of the compound could be reduced by decreasing the content of carbon black N550. When the temperature of thermogravimetric analysis reached 298 ℃，the C—Cl bond of CR began to decompose.
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