POE用量对POE/BR共混物性能的影响

Effect of POE Amounts on Properties of POE/BR Blends

为拓宽顺丁橡胶(BR)的应用范围,采用聚烯烃类热塑性弹性体(POE)改善BR的拉伸性能和抗撕裂性能,研究POE用量对POE/BR共混物性能的影响。结果表明:随着POE用量的增大,POE/BR共混物的t_(90)缩短,门尼粘度增大,拉伸强度和撕裂强度明显提高;当POE用量达40份时,POE/BR共混物的拉伸强度和撕裂强度与未添加POE的BR硫化胶相比均提高近1.7倍,且拉伸断面的裂纹扩展更加粗糙。

In order to broaden the application range of cis-polybutadiene rubber(BR),polyolefin thermoplastic elastomer(POE)was used to improve the tensile properties and tear resistance of BR,the effect of POE amounts on the properties of POE/BR blends was studied.The results showed that with the increase of POE amount,the t_(90) of POE/BR blends was shortened,the Mooney viscosity increased,the tensile strength and tear strength increased significantly.When the amount of POE reached 40 phr,the tensile strength and tear strength of POE/BR blend were nearly 1.7 times higher than that of the BR vulcanizate without POE,and the crack propagation on the tensile fractured section was rougher.