【摘要】 为探究橡胶混炼过程中加料顺序对炭黑分散及动态力学性能的影响，设计10组差异化加料顺序方案，通过炭黑分散度测试与橡胶加工分析仪应变扫描实验，分析了加料顺序对炭黑分散均匀性、储能模量(G′)变化幅度的影响。结果表明：加料顺序显著影响炭黑分散效果，“橡胶→增塑剂A+树脂+炭黑→油→小料”方案的炭黑分散度最优(均值6.18),对应的动态应变下G′变化幅度最小(152.62 kPa);全部小料与炭黑同步加入会形成“极性包裹层”,导致炭黑分散度降低(最低均值3.86);炭黑分散度与G′变化幅度呈显著负相关。更多还原

【Abstract】 The effects of feeding sequence on carbon black dispersion and dynamic mechanical properties during rubber mixing was investigated, 10 groups of differential feeding sequence schemes were designed. The influence laws of feeding sequence on the uniformity of carbon black dispersion and the variation range of storage modulus(G′) were analyzed by means of carbon black dispersion test and strain sweep experiment with a rubber process analyzer(RPA). The results showed that the feeding sequence had a significant impact on the carbon black dispersion effect. The scheme of "rubber → plasticizer A + resin + carbon black → oil → small ingredients" achieved the optimal carbon black dispersion degree(with an average value of 6.18), corresponding to the minimum variation range of G′ under dynamic strain(152.62 kPa). The synchronous addition of all small ingredients and carbon black would form a "polar wrapping layer", which led to a decrease in carbon black dispersion degree(lowest average value of 3.86). In addition, there was a significant negative correlation between carbon black dispersion degree and the variation range of G′.更多还原