复合保存剂BCT-2/NH_3对鲜天然胶乳保存效果及天然橡胶性能的影响

Influence of Compound Preserving Agent BCT-2/NH_3 on Preservation Effect of Fresh Natural Latex and Properties of Natural Rubber

采用环保型抑菌、杀菌剂BCT-2与氨(NH_3)复配作为鲜天然胶乳的新型复合保存剂,研究其对鲜天然胶乳保存效果、天然橡胶(NR)生胶6项指标、混炼胶硫化特性以及硫化胶物理性能的影响。结果表明:复合保存剂BCT-2/NH_3对鲜天然胶乳的保存效果优于NH_3和NH_3+TMTD/氧化锌,保存144 h后鲜天然胶乳的挥发脂肪酸值在0.05左右,粘度在10mPa·s左右,pH值高于9;相应NR生胶的塑性初值、塑性保持率和门尼粘度均小于NH_3保存试样;随着BCT-2的加入,混炼胶的最小转矩、最大转矩、焦烧时间和正硫化时间与氨保存试样相比均有一定程度的降低和缩短;而复合保存剂BCT-2/NH_3对硫化胶物理性能影响不大。

A compound preserving agent for fresh natural latex was prepared by using environmentally friendly antibacterial,bactericide BCT-2 and ammonia（NH3）,and the preservation effect and influence of that on the six indexes of NR raw rubber,the curing behavior of NR mix and the physical properties of NR vulcanizate were investigated. The results showed that the preservation effect of BCT-2/NH3 compound preserving agent on fresh natural latex was better than that of NH3 and NH3＋TMTD/ZnO. After 144 hours,the volatile fatty acid number was about 0. 05,the viscosity was about 10 mPa·s,and the pH value was above 9. The P0,PRI and Mooney viscosity of NR raw rubber were lower than those of NR preserved with NH3. With the addition of BCT-2,the minimum torque,maximum torque,scorch time and optimum cure time of the compound dropped in some extent compared with NH3 preserved one. BCT-2/NH3 compound preserving agent had little effect on the physical properties of the vulcanizate.