Determination of the mode of termination in free‐radical copolymerization

Chuh-Yung Chen, Zen‐Zli ‐Z Wu, Jen‐Feng ‐F Kuo

研究成果: Article同行評審

7 引文 斯高帕斯(Scopus)

摘要

In this study the apparent rate constant model was used to determine the mechanism of termination and other rate constants for free radical copolymerizations that are chemically controlled with no penultimate effect. The data required were the number average molecular weight and the conversion obtained at various initial initiator concentrations and monomer compositions, and two rate constants of propagation of the homopolymerizations of its two monomers. The bulk free radical copolymerization of methyl methacrylate (MMA) and styrene(St) at 60°C was studied. Three published literature values of the propagation rate constants k11 and k22. 750, 150; 515, 145; 705, 145, were used for the determination. The unit of the rate constants used was liter/mole/s. The modes of the termination reaction obtained, depending on k11, k22 used, are given as follows: (Table presented) The modes of termination obtained by the case of k11 = 750 and k22 = 150 are in good agreement with those shown by Bevington, Melville, and Taylor (1).

原文English
頁(從 - 到)553-557
頁數5
期刊Polymer Engineering & Science
27
發行號8
DOIs
出版狀態Published - 1987 1月 1

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 聚合物和塑料
  • 材料化學

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