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以吉林石化公司丁苯橡胶1502为研究对象,以12 h内聚合转化率达到(70±2)%、产品性能与(62±2)%时相当为研究目标,首先考察了在标准配方条件下,提高丁苯橡胶聚合转化率对丁苯橡胶反应时间、生胶门尼粘度、结合苯乙烯含量、凝胶含量和胶乳粘度的影响,在此基础上系统研究了分子量调节剂(硫醇)总量、补加量和补加时机对生胶门尼粘度、凝胶含量的影响;电解质用量对胶乳粘度、生胶门尼粘度和聚合速率的影响;补加软水对聚合速率和胶乳粘度的影响;单体纯度对聚合速率的影响;乳化剂用量、乳化剂补加量对聚合速率的影响,并对比测定了不同转化率丁苯橡胶生胶和硫化胶的性能。研究结果表明,在不改变原材料品种和规格的前提下,经过聚合配方和工艺条件的调整,在12 h内可以使丁苯橡胶1502聚合转化率由(62±2)%提高到(70±2)%,并确保70%转化率丁苯橡胶的性能指标全部达到优级品标准。
Taking Jilin Petrochemical Company styrene-butadiene rubber 1502 as the research object, the polymerization conversion rate reached (70 ± 2)% within 12 h, and the performance of the product was equivalent to (62 ± 2)%. The first study was conducted under standard formula conditions , The effects of the polymerization conversion rate of styrene-butadiene rubber on the reaction time of styrene-butadiene rubber, the Mooney viscosity of raw rubber, the bound styrene content, the gel content and the viscosity of the latex were improved. Based on this, the effects of molecular weight modifier The effects of the amount of electrolyte, the amount of supplementation and the additional timing on the Mooney viscosity and the gel content of the raw rubber; the influence of the amount of electrolyte on the viscosity of the latex, the Mooney viscosity of the raw rubber and the polymerization rate; the effect of the additional soft water on the polymerization rate and the viscosity of the latex ; Monomer purity on the polymerization rate; the amount of emulsifier, the amount of emulsifier on the rate of polymerization, and comparatively measured the conversion of styrene-butadiene rubber and vulcanizate properties. The results show that the polymerization conversion of SBR 1502 can be increased from (62 ± 2)% to (70 ± 2)% within 12 h after adjustment of polymerization recipe and process conditions, without changing the varieties and specifications of raw materials. )%, And ensure that the performance indicators of 70% conversion styrene-butadiene rubber to achieve all the excellent quality standards.