Bulk Polymerisation or Copolymerisation in a Novel Continuous Kneader Reactor
Bulk Polymerisation or Copolymerisation in a Novel Continuous Kneader Reactor
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DOI：
10.1002/masy.200651127
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发表时间：
2006-11
影响因子：
--
通讯作者：
P. Fleury
中科院分区：
文献类型：
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作者：
P. Fleury
在成熟的（捏合-）干燥器技术的基础上，提出了一种用于无溶剂连续自由基（共）聚合的新型捏合反应器。该反应器已被开发以满足（共）聚合所需的所有主要方面，同时保持先前机械设计的安全性和可靠性。新的捏合反应器提供了表面更新和蒸发冷却的完美结合，以控制温度到高转化率（85至95%），即使对于具有强凝胶效应（特罗姆斯多夫效应）和高放热的大块系统也是如此。反应器可以批量测试以优化配方，如本工作中甲基丙烯酸甲酯（MMA）的散装自由基聚合所示。模拟程序与实验批次数据相关联，以确定在给定分子量的PMMA下，引发剂和链转移剂的最佳浓度。本文还介绍了一种连续捏合反应器的设计，以优化转化率作为停留时间的函数，消除泡沫的形成，并生产无组分漂移的共聚物。
A new type of kneader reactor is proposed for the continuous radical (co-) polymerisation without solvent, based on the proven design of mature (kneader-) dryer technology. The reactor has been developed to satisfy all major aspects required for (co-) polymerisation while maintaining the safety and reliability of the previous mechanical design. The new kneader reactor offers a perfect combination of surface renewal and evaporative cooling to control temperature to high conversion (85 to 95%), even for bulk systems that have a strong gel effect (Trommsdorff's effect) and high exothermicity. The reactor can be tested batch-wise to optimise the recipe, as shown in this work for bulk free radical polymerisation of methyl methacrylate (MMA). A simulation program was correlated to the experimental batch data to determine the optimum concentrations of initiator and of chain transfer agent to target a given molecular weight of PMMA. Design of a continuous kneader reactor to optimise the conversion as a function of residence time, to eliminate foam formation, and to produce copolymers without composition drift, is also presented.