氯丁橡胶材料在减振方面的摩擦性能与力学性能研究

Study on Frictional and Mechanical Properties of Chloroprene Rubber Material for Shock Absorption

橡胶材料是重要的减振制品原料之一,其反应活性较高,需通过硫化过程明显改善材料性能。相较于乳液加氢法、溶液加氢法和乙烯-丙烯腈共聚法制备的丁腈橡胶材料,以自由基乳液聚合技术制备的氯丁橡胶(CR)材料具备更优越的硫化性能。文章以黄原酸调节型、硫醇调节型、硫黄调节型CR材料硫化胶为基体,探究CR材料在减振方面的门尼黏度、门尼焦烧时间、硫化特性、摩擦性能、力学性能和减振性能。结果表明:在减振方面,硫黄调节型CR材料硫化胶的门尼黏度、硫化程度、加硫指数、交联密度、拉伸强度、拉断伸长率、硬度、撕裂强度、回弹性指标值均最大,但门尼焦烧时间、门尼硫化时间、焦烧时间最短,存在较大加工安全隐患。黄原酸调节型CR材料硫化胶的拉伸强度、拉断伸长率、硬度和撕裂强度力学性能指标均适中。硫醇调节型CR材料硫化胶的平均摩擦系数最大,脆性温度最低,动静刚度比值最小,具有较好的耐磨性、耐寒性及减振性能。因此,深度分析CR材料在减振方面的摩擦性能与力学性能,可为电梯领域震动控制技术升级提供有益参考。

Rubber material is one of the important raw materials for shock absorption products,it has high reactivity and requires significant improvement in material properties through the vulcanization process.Compared with nitrile rubber materials prepared by lotion hydrogenation,solution hydrogenation and ethylene acrylonitrile copolymerization,chloroprene rubber(CR)materials prepared by free radical lotion polymerization technology have superior vulcanization performance.The article explores the Mooney viscosity,Mooney scorch time,vulcanization characteristics,friction properties,mechanical properties,and shock absorption performance of CR materials by taking the CR materials of xanthic acid regulated,thiol regulated,and sulfur regulated as the matrix.The results show that in terms of shock absorption,the Mooney viscosity,vulcanization degree,sulfur addition index,crosslinking density,tensile strength,elongation at break,hardness,tear strength,and resilience index of sulfur regulated CR material vulcanized rubber are the highest,but the Mooney scorch time,Mooney vulcanization time,and scorch time are the shortest,which poses significant processing safety hazards.The mechanical performance indicators of xanthan acid regulated CR material vulcanized rubber are moderate,including tensile strength,elongation at break,hardness,and tear strength.The average friction coefficient of thiol regulated CR material vulcanized rubber is the highest,the brittleness temperature is the lowest,and the ratio of dynamic and static stiffness is the lowest.It has good wear resistance,cold resistance,and shock absorption performance.Therefore,in-depth analysis of the friction and mechanical properties of CR materials in shock absorption Plastics Science and Technology NO.092024 can provide useful references for upgrading vibration control technology in the elevator field.