论文信息 - Continuous reactors in free radical polymerization with branching—I theoretical aspects and preliminary considerations

Continuous reactors in free radical polymerization with branching—I theoretical aspects and preliminary considerations

Abstract Molecular weight distribution in free radical polymerization has been investigated under conditions that promote branching. Calculations were performed for one particular well-established kinetic scheme in three reactor systems: batch, segregated continuous, and micro-mixed continuous. Structural complexity and distribution breadth were found to increase rapidly with conversion in all reactor types. Distributions in the continuous systems were much broader than those obtained in batch polymerizations. Based on these calculations, conditions were selected for the continuous polymerization of vinyl acetate to demonstrate the predicted differences.

K. Nagasubramanian | W. Graessley | W. W. Graessley | K. Nagasubramanian

[1] Walter H. Stockmayer,et al. Theory of Molecular Size Distribution and Gel Formation in Branched‐Chain Polymers , 1943 .

[2] K. G. Denbigh. Continuous reactions. Part II. The kinetics of steady state polymerisation , 1947 .

[3] K. Denbigh. The kinetics of continuous reaction processes: Application to polymerization , 1951 .

[4] Neal R. Amundson,et al. Continuous polymerization models—part II: Batch reactor polymerization , 1965 .

[5] P. V. Danckwerts. The effect of incomplete mixing on homogeneous reactions , 1958 .

[6] Neal R. Amundson,et al. Continuous polymerization models—I: Polymerization in continuous stirred tank reactors , 1965 .

[7] Paul J. Flory,et al. Molecular Size Distribution in Three Dimensional Polymers. II. Trifunctional Branching Units , 1941 .

[8] C. H. Bamford,et al. The calculation of molecular weight distributions from kinetic schemes , 1954 .

[9] J. K. Beasley. The Molecular Structure of Polyethylene. IV. Kinetic Calculations of the Effect of Branching on Molecular Weight Distribution1 , 1953 .