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New progress in the theory and model of carbon black reinforcement of elastomers

机译：弹性体炭黑增强理论和模型的新进展

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The author proposes a new concept with a new interface model for carbon black reinforcement of elastomer, based on stress analysis. The new model consists of double uncrosslinked polymer layers of different molecular mobility, the inner glassy hard (GH) layer, and the outer sticky hard (SH) layer surrounding a carbon particle. In this report, the most essential and fundamental three subjects in the carbon black reinforcement are discussed. Large stress increase with filler content and increasing strain amplitude results from the strong stress concentration generated around carbon particles and its transmission to the whole system. The great increase in tensile stress is only possible when the stress-hardened superstructure produced in the SH layer under large extension supports the large stress concentration. The super structure is the network of carbon particles interconnected by strands of oriented and extended molecules, together with a craze-like phenomenon forming numerous microvoids. Stress softening, called the Mullins effect, mainly results from the buckling of the strand of oriented molecules. Thus, the large and instant stress reduction takes place in unloading, in which the main load-bearing force is the entropic, contractile force of matrix crosslinked rubber. During long periods, the extended molecules in the uncrosslinked SH layer will considerably relax and return to their original entropic state. (C) 2004 Wiley Periodicals, Inc.
机译：基于应力分析，作者提出了具有新界面模型的新概念，用于弹性体的炭黑增强。新模型由分子流动性不同的双未交联聚合物层，内部玻璃状硬质（GH）层和包围碳颗粒的外部粘性硬质（SH）层组成。在本报告中，讨论了炭黑增强中最重要和最基本的三个主题。应力随着填料含量的增加而增加，而应变幅度的增加则是由于碳颗粒周围产生的强烈应力集中及其向整个系统的传递所致。只有当SH层在较大延伸率下产生的经过应力硬化的上部结构支持较大的应力集中时，拉伸应力才能大大增加。超级结构是由定向分子和延伸分子的链相互连接的碳颗粒网络，以及形成大量微孔的类似裂纹的现象。应力软化（称为穆林斯效应）主要是由定向分子链的弯曲引起的。因此，在卸载过程中会立即发生应力的大幅降低，其中主要的承载力是基体交联橡胶的熵，收缩力。在长时间内，未交联的SH层中的延伸分子将大量松弛并返回其原始熵状态。 （C）2004年Wiley Periodicals，Inc.

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