【作者】 王凯；

【导师】 陈丰秋； 詹晓力；

【作者基本信息】 浙江大学 ， 化学工程， 2006， 硕士

【摘要】 随着苯乙烯工业的发展，其生产装置的规模越来越大。为节省投资，需要适当降低苯乙烯精制时的真空度，这必将会使精制的温度有一定的提高，因此对工业生产中苯乙烯精制过程的聚合行为的系统研究就显得越来越重要。据此本文对90～120℃范围内、不同阻聚剂下、低转化率(0～10％)时苯乙烯的热聚合动力学进行了较为系统、全面的研究。论文首先确定了用折光指数法测定较低的苯乙烯转化率的方法。这种方法能够快速、精确地检测苯乙烯阻聚反应中的转化率，是一种比较理想的苯乙烯低转化率的测定方法。在90～120℃范围内，进行了苯乙烯本体热聚合的研究，考察了温度对聚合反应的影响，通过对聚合反应机理的研究及动力学数据的分析，建立了低转化率下苯乙烯本体热聚合的动力学模型；同时又考察了乙苯的添加对苯乙烯热聚合的影响并建立相似的动力学模型。在纯苯乙烯聚合基础上，着重考察了阻聚剂(缓聚剂DNBP和阻聚剂M)阻聚下苯乙烯的聚合行为，并系统研究了聚合温度、乙苯含量、缓聚剂及阻聚剂含量、阻聚剂的复配对苯乙烯本体热聚合动力学的影响规律。通过对聚合动力学实验数据的分析，分别建立了阻聚剂、缓聚剂和复配阻聚剂阻聚下苯乙烯的聚合动力学经验模型，得出了相应的动力学参数。这些模型的计算值和实验值能较好地吻合，可为苯乙烯工业生产装置的模拟计算和设计及优化操作、新型阻聚剂的开发提供重要的技术依据。更多还原

【Abstract】 As the development of styrene industry, the production equipment becomes greater and greater. For the purpose of saving investment, it will need to decrease the vacuum when refining styrene, which will somewhat increase the refining temperature. So it seams that it’s more and more important to have a systematical research for styrene polymerization, at industry production refining conditions. Hereby the thermal polymerization kinetics were studied systematically and generally at low temperature(90～ 120°C), different inhibitors and low conversion (0～10%).The method of refractive index was used to test the low conversion of styrene. This method is an accurate and fast way to test the change of the polymerization of styrene, and it is a fairly ideal and convenient to test the low conversion of styrene.The kinetics of bulk thermal polymerization of styrene at low temperature(90～120°C) were studied, and the effect of temperature on the polymerization was investigated in the experiment. A polymerization kinetic model was established according to the mechanism of polymerization and the analysis of the data of polymerization. At the same time, the effect of ethylbenzene’s addition on the polymerization was studied and another kinetic model was established which was similar with pure styrene’s.Based on the pure styrene’s polymerization, the inhibited polymerization by inhibitor (retarder DNBP and inhibitor M) was studied. The effect of polymerization temperature, the addition of ethylbenzene, the content of inhibitor (retarder DNBP and inhibitor M), and the compound of inhibitors was measured for the bulk thermal polymerization of styrene. According to the analysis of the experimental data of polymerization kinetics, the polymerization kinetic experimental models were established respectively inhibited by inhibitor, retarder and compounded inhibitor. The models gave a satisfactory fit of styrene conversion with the experiment over the ranges of low conversion(0～10%). They should offer important technical support in the simulative calculation, design, simulation of and optimization for production equipment in industrial production and exploitation of new inhibitors.更多还原