Effects of chain length dependence of termination rate constant on the kinetics of free-radical polymerization. 1. Evaluation of an analytical expression relating the apparent rate constant of termination to the number-average degree of polymerization

1985 ◽  
Vol 18 (6) ◽  
pp. 1319-1324 ◽  
Author(s):  
Hadi K. Mahabadi
2002 ◽  
Vol 55 (7) ◽  
pp. 399 ◽  
Author(s):  
G. T. Russell

Some fundamental aspects of the kinetics of free-radical polymerization are reviewed. So-called classical results for rate and molecular-weight distribution are first of all presented. It is shown how this approach can be built upon when chain-length-dependent termination is allowed, which it always should be. Various termination models are considered, and it is illustrated that although the models are different, rather remarkably they give common, model-independent behaviour. Some leading experimental results regarding the chain-length dependence of termination are summarized, before the chain-length dependence of other reactivities, the variation of reactivities with conversion, and non-steady state experiments are briefly discussed. Finally, living free-radical polymerization as effected by a reversible termination agent is considered. An outline of the kinetics of these systems is given, with the oft-neglected importance of conventional termination being stressed.


2018 ◽  
Vol 8 (3) ◽  
pp. 585-594
Author(s):  
Khdbudin Mulani ◽  
Ravindra Ghorpade ◽  
Surendra Ponrathnam ◽  
Nayaku Chavan ◽  
Kamini Donde

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