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首页> 外文期刊>Journal of Applied Polymer Science >About the Activation Energies of the Main and SecondaryRelaxations in Cured Styrene Butadiene Rubber
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About the Activation Energies of the Main and SecondaryRelaxations in Cured Styrene Butadiene Rubber

机译：关于硫化丁苯橡胶主要和次要弛豫的活化能

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This article studies the influence of the net-work structure on the activation energies of the α and βrelaxations in vulcanized styrene butadiene rubber, SBR. Acure system based on sulphur and TBBS (N-t-butyl-2-ben-zothiazole sulfenamide) was used in the formulation ofseveral compounds cured at 433 K. The activation energieswere evaluated from internal friction (loss tangent) data ofthe compounds using an automated subresonant forcedpendulum in a wide frequency range and between 80 Kand 273 K. The internal friction data of the samples revealtwo transitions, α and β, characterized by the temperaturesT_αandT_β,due to the glass transition and the phenylgroup rotation of the copolymer, respectively. Although T_αincreases at higher crosslink density, it shows also a de-pendence with the amount of polysulphide and monosul-phide linkages present in the samples. The highest
机译：本文研究了网络结构对硫化丁苯橡胶SBR中α和β松弛的活化能的影响。在433 K固化的几种化合物的配方中使用了基于硫和TBBS（Nt-丁基-2-苯并恶唑唑次磺酰胺）的Acure系统。使用自动亚共振强迫摆锤根据化合物的内摩擦（损耗角正切）数据评估了活化能。在80 K和273 K之间的宽频率范围内。样品的内摩擦数据揭示了两个转变，即α和β，其特征在于温度T_α和T_β，这分别归因于共聚物的玻璃化转变和苯基旋转。尽管T_α在较高的交联密度下会增加，但它也显示出样品中存在的多硫化物和单硫化物-键之间的联系减少。最高的

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