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首页> 外文期刊>Journal of Applied Polymer Science >Effect of Blend Ratio on Mooney Scorch Time of Rubber Blends
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Effect of Blend Ratio on Mooney Scorch Time of Rubber Blends

机译：混合比对橡胶混合料门尼焦化时间的影响

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摘要

The Mooney scorch times of three rubber blends[epoxidized natural rubber(ENR) 50/SMR L,ENR 50/styrene butadiene rubber (SBR),and Standard Malaysian Rubber SMR L/SBR]were studied in the temperature range of 120-160 deg C using an automatic Mooney viscometer.N-Cyclohexyl-2-benzothiazyl sulfenamide was used as the accelerator,and the rubber formulation was based on the conventional vulcanization system.Results for the blends investigated indicate that a negative deviation of scorch time from the interpolated value was observed,especially for temperatures lower that 130 deg C.This observation was attributed to the induction effect of the ENR 50 in the ENR 50/SMR L and ENR 50/SBR blends to produce more activated precursors to crosslinks,thus enhancing interphase crosslinking.To a lesser extent,SMR L also exhibited such an induction effect in the SMR L/SBR blend.At 120 deg C,maximum induction effect occurred at around a 40% blend ratio of ENR 50 and SMR L in the respective blends,For the filled stock at 140 deg C,carbon black exhibited less effect on the scorch property of the blends compared to silica.
机译：研究了三种橡胶共混物的门尼焦化时间[环氧化天然橡胶（ENR）50 / SMR L，ENR 50 /苯乙烯丁二烯橡胶（SBR）和标准马来西亚橡胶SMR L / SBR]，温度范围为120-160摄氏度使用自动门尼粘度计C进行测定.N-环己基-2-苯并噻唑基亚磺酰胺用作促进剂，橡胶配方基于传统的硫化体系。观察到，特别是在低于130℃的温度下。该观察结果归因于ENR 50 / SMR L和ENR 50 / SBR共混物中ENR 50的诱导作用，以产生更多的交联活化前体，从而增强了相间交联。在较小的程度上，SMR L在SMR L / SBR共混物中也表现出这种诱导作用。在120摄氏度下，在各自的共混物中ENR 50和SMR L的掺混比约为40％时，最大的诱导作用发生在菲尔如果在140℃下使用铅原料，则炭黑对掺混料的焦烧性能影响不如二氧化硅。

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