Polymerization of olefins through heterogeneous catalysis. VIII. Monomer sorption effects
Polymerization of olefins through heterogeneous catalysis. VIII. Monomer sorption effects
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DOI：
10.1002/app.1990.070410106
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发表时间：
1990
影响因子：
3
通讯作者：
R. Hutchinson;W. Ray
中科院分区：
文献类型：
--
作者：
R. Hutchinson;W. Ray
在固体催化烯烃聚合中，平衡吸附在催化剂表面活性中心周围的半结晶聚合物壳层中起着决定局部单体浓度(S)的关键作用。基于聚合物溶液热力学的模型表明，结晶度和反应环境对局部单体浓度有很大影响。该模型用于解释文献中常见的实验趋势，如观察到的气相和稀释剂浆料聚合速率的差异，以及在气相共聚中增强α-烯烃的并入。
In solid catalyzed olefin polymerization, equilibrium sorption plays a key role in determining the local monomer concentration (s) in the semicrystalline polymer shell which surrounds the active sites of the catalyst surface. Modelling based on polymer solution thermodynamics indicates that crystallinity and reactor environment have a major effect on this local monomer concentration. The model is used to explain well known experimental trends seen in the literature, such as observed differences in gas phase and diluent slurry polymerization rates, and enhanced α-olefin incorporation in gas phase copolymerization.