交联助剂对过氧化物硫化天然胶乳性能的影响

选用不同的过氧化物硫化体系制得硫化天然胶,在此基础上探讨了不同种类及用量的交联助剂和热处理温度对硫化效果的影响.结果表明:选用BPO过氧化物硫化天然胶时,添加3份DVB交联助剂的硫化天然胶,基本达到了硫黄硫化的基本力学性能;选用过氧化二叔丁基-硫酸亚铁络合物的氧化还原体系,添加3份的SJ-1交联助剂,在80℃以上时,可使硫化天然胶性能进一步提高,拉伸强度相比BPO过氧化物硫化的天然胶增加了近一倍.平衡溶胀试验的结果表明,氧化还原体系制得的硫化胶有最小的平衡溶胀增量和最大的凝胶含量.

Effect of Coagent on NR Latex Properties cured with Peroxides

NR latex cured with different peroxides curing systems was made, and an effect of different varieties and different addition of coagents on curing efficiency was discussed. The results showed that the basic mechanical properties of NR latex cured with sulfur were achieved by using BPO peroxide as curing agent and adding 3 phr DVB coagent. The vulcanization properties were improved by using DTBP-ferrous sulfate complex as redox system, adding 3 phr SJ-1 coagent and at 80, the tensile strength was 2 times of that of NR latex cured with BPO peroxide. The equilibrium swelling test showed that the vulcanization made by using redox system had minimum equilibrium swelling weight increase and maximum gel content.