Page 65 - 《橡塑技术与装备》2024年4期

理论与研究 邓权桉 等·橡塑比对 EPDM/PA6 热塑性动态硫化橡胶的性能影响研究

较接近，70/30 的扭矩有最小值。 参考文献 ：
[1] Naskar K.Thermoplastic elastomers based on PP/EPDM
（2）对不同 EPDM/PA6 共混橡塑比的断面微观
blends by dynamic vulcanization[J]. Rubber Chemistry and
形貌分析发现，四组橡塑比均形成了 “ 海岛 ” 结 构， Technology，2007，80(3):504-519.
70/30 形成的 “ 海岛 ” 结构中橡胶微粒的尺寸和分散 [2] 刘雅煊，汤琦，刘伟瑞 . 等 . 热塑性动态硫化橡胶研究及应用
状态更均匀。 进展 [J]. 合成橡胶工业，2021, 44(3):245.
[3] 马军，张惠峰，赵阳 . 等 .EPDM/ 三元共聚尼龙高性能弹性
（3）对不同 EPDM/PA6 共混物橡塑比进行力学
体相容剂及共混工艺的研究 [J]. 橡胶工业，2000(06):323-
性能测试发现，随着橡塑比的增加，EPDM/PA6 共 330.
混物的拉伸强度和断裂伸长率先上升后下降，分别在 [4] Li S，Tian H，Hu G-H，et al. Effects of shear during
injection molding on the anisotropic microstructure and
EPDM/PA6 为 60/40 和 70/30 时达到较大值。从节约
properties of EPDM/PP TPV containing rubber nanoparticle
成本目的考虑，橡塑比为 70/30 的共混物有最小的扭 agglomerates[J]. Polymer，2021，229(3):124 008.
矩，因此选用 70/30 的为宜。 [5] 张晓芳 . EPDM/PA 硫化胶及其 TPV 结构和性能的研究 [D].
青岛科技大学，2016.

Research on the effect of rubber-plastic ratio on the properties of
EPDM/PA6 thermoplastic dynamic vulcanized rubber

Deng Quan'an, Ma Yi, Wang Xuanlun*
(College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054,
China )
Abstract: Blended EPDM/PA6 thermoplastic dynamic vulcanized rubber (TPV) was prepared by dynamic
vulcanization extrusion molding, and different proportions of EPDM/PA6 blends were studied. The analysis of
brittle fracture microstructure shows that all four rubber-plastic ratios form an "island" structure, with rubber
particles with a rubber-plastic ratio of 70/30 having a more uniform size and dispersion state. The analysis of
processing rheology shows that the torque with a rubber plastic ratio of 70/30 has a minimum value; As the
rubber-plastic ratio increases, the tensile strength and fracture elongation first increase and then decrease,
reaching their maximum values at EPDM/PA6 ratios of 60/40 and 70/30, respectively. From a cost perspective,
it is advisable to choose a rubber-plastic ratio of 70/30.
Key words: dynamic vulcanization; rubber-plastic ratio; extrusion molding; thermoplastic vulcanized
rubber
(R-03)

2024 第 50 卷 ·17·
年