NR/BR并用质量比对胎侧胶臭氧老化和屈挠疲劳性能的影响  

Influence of NR/BR ratio on ozone-aging and flex-fatigue resistance of sidewall

作　　者：张潇杨 卢雪 李海龙 赵菲[1] ZHANG Xiaoyang;LU Xue;LI Hailong;ZHAO Fei(Qingdao University of Science and Technology,Qingdao 266042,China;Hansheng Chemical(Fushun)Co.,Ltd,Fushun 113004,China)

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042 [2]汉圣化工(抚顺)有限公司,辽宁抚顺113004

出　　处：《弹性体》2023年第6期46-50,共5页China Elastomerics

摘　　要：研究了轮胎胎侧胶中天然橡胶(NR)和顺丁橡胶(BR)比例对胎侧胶耐臭氧老化和屈挠疲劳性能的影响。结果表明,由于NR的自补强性,随着共混胶中BR比例增加,胶料的拉伸强度、撕裂强度、定伸应力降低,但回弹性增加。由于BR的柔顺性及防护蜡在NR中相对高的溶解度,防护蜡在BR含量高的胎侧胶中的迁移速度快,迁移量高。胎侧胶的耐臭氧老化性和动态屈挠疲劳性能均取决于硫化胶的强度和防护蜡的迁移速度和迁移量。纯NR和纯BR胶料的耐臭氧老化性能和耐屈挠性能均不理想,NR/BR(50/50~40/60)共混胶由于强度和蜡的迁移量间的平衡而具有更好的耐臭氧老化和耐屈挠疲劳性能。The influence of NR/BR ratio on ozone-aging and flex-fatigue resistance of sidewall was studied.The results showed that with the increasing of BR,the tensile strength,tear strength,and modulus of vulcanizate decreased due to the self-reinforcement of NR,while the resilience increased due to the more flexible of BR′s mainchain.Wax migrated faster in BR-rich blend and thicker wax film was formed on rubber surface due to flexible BR and relative high solubility of wax in NR.The ozone-aging and flex-fatigue resistance was determined by both the strength of vulcanizates and the migration rate and amount of wax.For pure NR or BR compound,the ozone-aging and flex-fatigue resistance were not ideal.For compound with NR/BR(50/50~40/60)had much more excellent ozone-aging and flex-fatigue resistance due to good balance between vulcanizate′s strength and wax migration amount.

关 键 词：胎侧胶 天然橡胶 顺丁橡胶 防护蜡 臭氧老化 屈挠疲劳 

分 类 号：TQ332[化学工程—橡胶工业] TQ333.2