Page 68 - 《橡塑技术与装备》2021年17期（8月上半月 橡胶版）

橡塑技术与装备（橡胶） CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT (RUBBER)

拉断强度保持率和扯断伸长率保持率如表 4 所示。 老化前，略有上升。共混胶的硬度较老化前均有所上
表 4 热油老化后 MPU/PAM/CM 共混胶物理机械性能 升，这是因为热油老化时，共混胶进一步交联，交联
1# 2# 3# 4# 5# 程度增大，分子链网络变密，因此硬度升高。
拉断强度保持率 /% 97.19 95.12 87.66 91.10 99.87
扯断伸长率保持率 /% 104.03 101.17 86.47 94.74 94.63
拉伸永久变形 /% 30 35 40 35 35
硬度 / 邵 A 89 90 91 92 92 3 结论
（1）随着 DCP 用量的增大，MPU/PAM/CM 共混
总体来看，MPU/PAM/CM 的拉断强度保持率和
胶的硫化速度均加快且 M H 增大。
扯断伸长率保持率在 86.47%~104.03% 范围内，具有
（2）随着 DCP 用量的增大，MPU/PAM/CM 的硬
良好的耐热油老化热油老化性能较为优异 5# 拉断强
度逐渐增大，拉断强度和扯断伸长率先增大后减小。
度保持率较接近 100%，2# 扯断伸长率较接近 100% ；
（3）老化前，MPU/PAM/CM 的物理机械性能较
由于老化前 3# 共混胶的拉断伸长率较长，热油老化
优异，热油老化后，MPU/PAM/CM 性能保持率接近
时，部分低分子液压油渗入，老化后拉伸时部分分子
于 100%。
链滑脱，导致 3# 拉断强度保持率和扯断伸长率保持率
较其余组较低。
参考文献 ：
MPU/PAM/CM 共混胶热油老化后的扯断永久形 [1] 刘厚均 . 聚氨酯弹性体手册 [M]. 2 版 . 北京：化学工业出版社，
变，随着 DCP 用量的增大 MPU/PAM/CM 的扯断永 2012:1-281.
[2] 杨清芝，邓涛 . 实用橡胶工艺学 [M]. 北京 ：化学工业出版社，
久性变随 DCP 用量的增大的变化趋势与老化前接近，
2015:418-419.
为 30%~40%，较老化前 25%~35% 基本不变。这说明 [3] 温卫东，刘凉冰，郝亚暾 . 过氧化物硫化聚醚型聚氨酯混炼橡
MPU/PAM/CM 共混胶具有良好的耐热油老化性能。 胶力学性能的研究 [J]. 聚氨酯工业，2013,28(2):16-18.
[4] 孙小童，常甲兵，曾凡伟，等 .FEF 与 DCP 用量对 NBR/AEM 胶
热油老化后 MPU/PAM/CM 共混胶的硬度随着
料性能影响的研究 [J]. 化学推进剂与高分子材料，2020,18
DCP 用量的增大，MPU/PAM/CM 的硬度变化趋势同 (06):58-63.

Influence of DCP dosage on the properties of
MPU/PAM/CM blended rubber

Han Xiao, Deng Tao*

(Qingdao University of Science and Technology, Qingdao 266042, Shandong, China)
Abstract: MPU/PAM/CM blended rubber were prepared by using a high-temperature internal mixer
and an open mill, and the effects of different amounts of DCP on the vulcanization characteristics and the
physical and mechanical properties of the blended rubber before and after oil aging were investigated. The
study found that as the amount of DCP increases, the vulcanization speed of MPU/PAM/CM increases and
MH increases; MPU/PAM/CM has excellent physical and mechanical properties and heat-resistant media
properties. The tensile strength and elongation at break of the blended rubber both increase first and then
decrease with the increase of the amount of DCP; Under large strain, MPU/PAM/CM blended rubber show
good toughness; With the increase of the amount of DCP, the change trend of the permanent deformation of
MPU/PAM/CM with the increase of the amount of DCP is close to that before aging, ranging from 30% to 40%,
which is basically unchanged from 25% to 35% before aging.
Key words: mixed polyurethane rubber (MPU); static vulcanization; heat resistance; physical and
mechanical properties
（R-03）

·18· 第 47 卷 第 17 期