氧化锌对集成橡胶SIBR2505硫化特性和力学性能的影响

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氧化锌对集成橡胶SIBR2505硫化特性和力学性能的影响
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通过对显微镜观察结果、硫化特性、拉伸性能和动态力学性能的表征,考察了氧化锌在集成橡胶中的混炼工艺以及提高氧化锌分散效果的几种方法。结果表明,增加氧化锌和硬脂酸的用量,高温混炼工艺能够改善未填充集成橡胶硫化胶的力学性能。活性氧化锌、纳米氧化锌和载体氧化锌在集成橡胶中的分散性及硫化胶力学性能优于普通氧化锌,其中纳米氧化锌胶料的动态力学性能最好。预混合方法和自制分散剂可延长焦烧时间并缩短正硫化时间,提高集成橡胶硫化胶的拉伸性能。加入氧化锌对白炭黑的分散过程几乎没有影响,但阻碍了橡胶分子链与白炭黑粒子间的交联反应,使白炭黑填充的集成橡胶焦烧时间与正硫化时间均延长,硫化速率和硫化程度均降低,硫化胶拉伸强度、撕裂强度和动态模量均减小,滞后损失增加。
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: f, A% |6 o% ?, d* XThe mixing technology and methods to improve dispersion effect of zinc oxide(ZnO) in integrated rubber(SIBR) were studied by characterizing the results observed with microscope,curing characteristics,tensile properties and dynamic-mechanical properties.The results showed that the mixing technology at high temperature could improve the mechanical properties of unfilled SIBR vulcanizate by increasing the dosage of ZnO and stearic acid.The dispersion of activated ZnO,nano-ZnO and carrier ZnO in SIBR and the me...