【摘要】 本工作对分别以硫磺-过氧化二异丙苯、对苯醌二肟-硫磺和溴化特辛基酚甲醛树脂为硫化体系的三元乙丙橡胶/氯化丁基橡胶并用胶料(相应于试样Ⅰ、Ⅱ和Ⅲ),采用压缩应力松弛法和拉伸应力松弛法进行了热氧老化试验,得到了寿命～温度直线方程式,并计算了三种硫化并用胶的使用期。结果表明,在70℃下使用,其应力松弛到起始值的50％所需要的时间分别为:试样Ⅰ,6.3年,试样Ⅱ,7.1年;试样Ⅲ,7.9年。在170℃下的老化系数分别为80、58和64％。更多还原

【Abstract】 The thermo-oxidative resistance of the ethylene-propylene-diene terpolymer ( EPDM ) and chlorinated butyl rubber ( CIIR ) system blends vulcanized with sulphur-dicumyl peroxide ( S-DCP ) ,p-benzoquinone dioxme-sulphur ( GM-S ) and brominated polymethyl phenol resin ( 201 resin ) was evaluated by the methods of compressed stress relaxation and tensile stress relaxation during oven aging in hot air. On the basis of the calculated results that the compressed stress of the vulcanizates relaxed to 50% of the original stress value under 70℃, the service-life of EPDM-CIIR blends vulcanized with S-DCP, GM-S and 201 resin were predicted to be 6.3, 7.1 and 7.9 years, respectively, and corresponding to the aging coefficients 80%, 58% and 64%.更多还原