Page 72 - 《橡塑技术与装备》2021年17期（8月上半月 橡胶版）
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橡塑技术与装备（橡胶） CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT (RUBBER)
表 4 预硫化不同时间后不同节点处 Mises 应力
节点编号 0# 1# 2# 3# 4#
1 1.6 1.5 1.5 1.3 1.4
2 1.8 1.7 1.7 1.5 1.6
3 3.1 3 2.8 2.6 2.7
4 2.6 2.5 2.4 2.1 2.2
5 1.3 1.2 1.1 1 1.1
（2）预硫化工艺对丁腈橡胶物理机械性能影响明
显，通过预硫化手段得到的硫化胶，老化前的扯断伸
长率增加，定伸应力降低，硬度降低 ；硫化胶热油老
化后的拉断强度增大，扯断伸长率增大，定伸应力降
低。
（3）预硫化工艺对胶管扣压性能影响主要表现
图 5 预硫化不同时间对应力集中单元处应变能密度的影 为 ：静刚度、应力集中单元处应变能密度及相同节点
响 处 Mises 应力随着预硫化时间的延长呈现降低趋势。
3 结论 参考文献 ：
（1）预硫化工艺对硫化特性影响较大，表现为降 [1] 李瑛瑜，陈龙，赵菲 . 硫化体系对丁腈橡胶耐油、耐低温和压
低最大转矩及转矩差值，t 10 缩短。 变性能的影响 [J]. 弹性体，2020,30(03):46-49.
Effect of different vulcanization processes on the mechanical properties
of CR/NBR blended rubber before and after hot oil aging and the
withholding properties of hoses
You Liming, Du Wei, Han Xiao, Dong Xiaokun, Deng Tao*
(Qingdao University of Science & Technology, Qingdao 266042, Shandong, China)
Abstract: This article mainly studies the effects of different vulcanization processes on the mechanical
properties of CR/NBR blended rubber before and after hot oil aging. The CR part was pre-vulcanized for a
certain period of time by pre-vulcanization, and then blended with NBR to study the effect of pre-vulcanization
on the performance of the blended rubber before and after heat-resistant oil aging. The vulcanization
characteristic experiment shows that the pre-vulcanization process will reduce the maximum torque and the
torque difference, and t 10 will be shortened. The results of physical and mechanical performance experiments
show that the pre-vulcanization process increases the tensile strength and elongation of the blended
rubber after hot oil aging, as well as the performance retention rate before and after aging, and the overall
performance is improved. The simulation results show that the pre-vulcanization process reduces the static
stiffness, the strain energy density at the stress concentration element and the Mises stress at the same node.
Key words: pre-vulcanization; CR/NBR; simulation; blending
（R-03）
·22· 第 47 卷 第 17 期
