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首页> 外文期刊>Journal of Applied Polymer Science >Hysteresis temperature dependence in filled rubbers. II. Mechanical mixing, filler microdispersion, and polymer-filler interactions
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Hysteresis temperature dependence in filled rubbers. II. Mechanical mixing, filler microdispersion, and polymer-filler interactions

机译：填充橡胶的滞后温度依赖性。二。机械混合，填料微分散和聚合物-填料相互作用

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The effects of mechanical mixing and filler-filler (F-F) and polymer-filler (P-F) interactions on the normalized state of a filler microdispersion [d(x)] and the viscoelastic properties of silica-filled rubbers were studied. The rubbers were prepared with or without the addition of n-octyl-triethoxysilane (OTES) to modify F-F interactions or coupling agents such as 3-mercaptopropyl-trimethoxysilane and 3-mercaptopropyl-triethoxysilane (MPTES) to increase P-F interactions. Increased mixing improved d(x) and enhanced the hysteresis temperature dependence (HTD) by giving a higher tan 8 value near the compound glass-transition temperature (T-g) but lowered tan 6 at elevated temperatures for stocks containing a coupling agent. The changes in P-F and F-F interactions in rubbers with mixing and subsequent thermal treatment were shown to be responsible for the property differences observed among stocks containing different silanes. Attempts were made to quantify the efficiency for improving d(x) with various silanes. The increased P-F interactions in compounds containing MPTES showed better efficiency for improving d(x) and enhancing HTD in comparison with OTES. It was also demonstrated that the change in hysteresis near T-g was mainly governed by the degree of filler networking, whereas elevated-temperature hysteresis was strongly influenced by the P-F interactions in compounds. (c) 2008 Wiley Periodicals, Inc.
机译：研究了机械混合，填料-填料（F-F）和聚合物-填料（P-F）相互作用对填料微分散体[d（x）]的归一化状态和二氧化硅填充橡胶的粘弹性的影响。在添加或不添加正辛基三乙氧基硅烷（OTES）来改善F-F相互作用或偶联剂（例如3-巯基丙基-三甲氧基硅烷和3-巯基丙基-三乙氧基硅烷（MPTES））以增加P-F相互作用的情况下制备橡胶。增加混合可改善d（x），并通过在化合物玻璃化转变温度（T-g）附近提供更高的tan 8值来提高滞后温度依赖性（HTD），但对于含有偶联剂的浆料，在升高的温度下会降低tan 6。橡胶中P-F和F-F相互作用的变化以及混合和随后的热处理表明，这是造成在含有不同硅烷的胶料中观察到的性能差异的原因。尝试量化使用各种硅烷改善d（x）的效率。与OTES相比，含MPTES的化合物中增强的P-F相互作用显示出更好的改善d（x）和增强HTD的效率。还表明，T-g附近的磁滞变化主要受填料网络的程度控制，而高温磁滞则受化合物中P-F相互作用的强烈影响。 （c）2008 Wiley期刊公司

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