Measurement and modeling of vinyl acetate polymerization kinetics to support new process development

醋酸乙烯聚合动力学的测量和建模以支持新工艺开发

• 批准号: 467684-2014
• 负责人: Hutchinson, Robin
• 金额: $ 1.13万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=577159
• 关键词: Measurement; modeling; vinyl; acetate; polymerization

DuPont is developing a low temperature (<100 °C), low pressure (<100 bar) water-based miniemulsion process for the production of ethylene/vinyl acetate copolymers to replace the high temperature, high pressure (150-300 °C, 1500-3000 bar) technology used currently in industry. DuPont Canada is involved in the plans to scale-up the new process, with pilot plant design and development slated to begin in 2014. They have funded the Hutchinson group to study the underlying vinyl acetate radical polymerization mechanisms and provide accurate values of kinetic rate coefficients. The influence of head-to-head monomer insertion on polymerization propagation rate will be studied using a specialized pulsed-laser polymerization technique and NMR analysis of the resulting polymer structure, as well as measurement of the polymer molecular weight distributions. Using procedures previously developed for acrylate systems, the results will be analyzed to provide estimates for relevant propagation rate coefficients. A model of the polymerization kinetics, including degradative chain transfer and chain transfer to polymer, will be developed and verified against available literature data.

杜邦公司正在开发一种低温（<100°C）、低压（<100 bar）水基细乳液工艺，用于生产乙烯/醋酸乙烯酯共聚物，以取代高温、高压（150-300°C、1500 -3000 bar) 技术目前在工业中使用，杜邦加拿大公司参与了新工艺的扩大规模计划，试点工厂的设计和开发计划于 2017 年开始。 2014年。他们资助Hutchinson小组研究乙酸乙烯酯自由基聚合的潜在机理，并提供动力学速率系数的准确值。 将使用专门的脉冲激光聚合技术和所得聚合物结构的核磁共振分析以及使用先前开发的程序测量聚合物分子量分布来研究头对头单体插入对聚合传播速率的影响。丙烯酸酯体系，将对结果进行分析，以提供聚合动力学模型，包括降解链转移和聚合物链转移，并将根据现有文献数据进行验证。