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A probe into the complex process

机译:探索复杂的过程

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摘要

Vulcanization, also known as cross-linking or curing, is the process where the rubber chains are joined together, increasing strength and elasticity, and reducing the tendency of the rubber to creep when extended. On a molecular level, elastomers exist as single polymer chains. A measure of strength and elasticity is present, through entanglement of the chains, but this strength and elasticity is not high. Vulcanization introduces crosslinks to tie the separate polymer chains together, and this can greatly enhance strength and elasticity. Table 1 shows typical results for an unfilled natural rubber (NR) compound, before and after vulcanization. As can be seen both the tensile strength and tensile modulus are increased significantly, whilst the elongation is only slightly reduced.
机译:硫化,也称为交联或固化,是将橡胶链连接在一起,增加强度和弹性并减少橡胶在拉伸时蠕变的趋势的过程。在分子水平上,弹性体作为单个聚合物链存在。通过链的缠结,存在强度和弹性的量度,但是该强度和弹性不高。硫化引入交联将单独的聚合物链连接在一起,这可以大大提高强度和弹性。表1显示了硫化前后未填充天然橡胶(NR)化合物的典型结果。可以看出,抗张强度和拉伸模量均显着提高,而伸长率仅略微降低。

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