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首页> 外文期刊>Journal of Applied Polymer Science >Reinforcement of maleated natural rubber by precipitated silica
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Reinforcement of maleated natural rubber by precipitated silica

机译：沉淀二氧化硅增强马来化天然橡胶

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摘要

Graft copolymers of maleic anhydride and natural rubber or so-called maleated natural rubbers (MNRs) were prepared in a molten state with varying maleic anhydride contents from 4 to 10 phr. In this work, the filler-filler and filler-rubber interactions of the MNR and precipitated silica were investigated. The MNR compounds containing 40 phr of silica both with and without 9 wt % of silane coupling agent were prepared. By increasing the maleic anhydride contents, the Mooney viscosity and cure times were increased, but the torque differences and cure rate indices were decreased. Bound rubber was increased with increasing maleic anhydride content, indicating an increase of filler-rubber interaction. In case of the compounds without silane, the MNR with 6 phr of maleic anhydride showed the lowest filler-filler interaction as indicated by a decrease of storage modulus upon an increase of strain in the filled compound i.e., Payne effect. This MNR compound also yielded the optimum mechanical properties. It has been demonstrated that a use of MNR with appropriate maleic anhydride content can reduce filler-filler interaction dramatically and hence improve a silica dispersion, as confirmed by SEM micrographs, resulting in an enhancement of the mechanical and dynamical properties. (C) 2008 Wiley Periodicals, Inc.
机译：在熔融状态下制备马来酸酐和天然橡胶或所谓的马来酸化天然橡胶（MNR）的接枝共聚物，其中马来酸酐的含量在4至10phr之间变化。在这项工作中，研究了MNR和沉淀二氧化硅的填料-填料和填料-橡胶相互作用。制备了含有和不含9重量％的硅烷偶联剂的含有40phr二氧化硅的MNR化合物。通过增加马来酸酐含量，门尼粘度和固化时间增加，但扭矩差和固化速率指数降低。随着顺丁烯二酸酐含量的增加，结合的橡胶增加，表明填料-橡胶相互作用增加。在没有硅烷的化合物的情况下，具有6 phr马来酸酐的MNR表现出最低的填充剂-填充剂相互作用，这是由填充化合物中应变增加引起的储能模量降低（即Payne效应）所表明的。该MNR化合物还产生了最佳的机械性能。已经证明，具有适当的马来酸酐含量的MNR的使用可以显着降低填料与填料之间的相互作用，从而改善二氧化硅的分散性（如SEM显微照片所证实），从而提高了机械和动力学性能。 （C）2008 Wiley期刊公司

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