A reexamination of the method for determining radical polymerization rate constants

1981 ◽  
Vol 14 (1) ◽  
pp. 227-228 ◽  
Author(s):  
Tamio Yasukawa ◽  
Kenkichi Murakami
Keyword(s):  
Radical Polymerization ◽  
Rate Constants ◽  
Polymerization Rate

Viscosity effects in the free-radical polymerization of methyl methacrylate

1977 ◽  
Vol 357 (1689) ◽  
pp. 183-192 ◽  
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Kinetic Scheme ◽  
Translational Diffusion ◽  
Chain Termination ◽  
Polymerization Rate ◽  
Solution Viscosity ◽  
Viscosity Effects ◽  
Free Radical Initiator

Methyl methacrylate has been polymerized in the presence of poly(methyl methacrylate) by using a free-radical initiator. The efficiency of the initiator is shown to be independent of the viscosity. At high viscosities, chain termination was influenced by the rate of translational diffusion of the polymer radicals. The dependence of the polymerization rate on viscosity is less than that predicted by a simple kinetic scheme. It appears that only those radicals which are above a certain size have their chain termination reactions controlled by the solution viscosity. This limiting size decreases as the viscosity increases.

Synthesis of highly reactive polyisobutylene by catalytic chain transfer in hexanes at elevated temperatures; determination of the kinetic parameters

2017 ◽  
Vol 8 (18) ◽  
pp. 2852-2859 ◽  
Author(s):  
Tota Rajasekhar ◽  
Jack Emert ◽  
Rudolf Faust
Keyword(s):  
Kinetic Parameters ◽  
Rate Constants ◽  
Chain Transfer ◽  
Elevated Temperatures ◽  
Polymerization Rate ◽  
Carbenium Ions ◽  
Catalytic Chain Transfer ◽  
Highly Reactive Polyisobutylene ◽  
Increasing Temperature

The rate constants of activation/deactivation for dormant oxonium/active carbenium ions have been measured and related to the increasing polymerization rate with increasing temperature.

Assessing the Importance of Diffusion‐Controlled Effects on Polymerization Rate and Molecular Weight Development in Nitroxide‐Mediated Radical Polymerization of Styrene

2007 ◽  
Vol 44 (2) ◽  
pp. 193-203 ◽  
Author(s):  
Martha Roa‐Luna ◽  
Martha Patricia Díaz‐barber ◽  
Eduardo Vivaldo‐Lima ◽  
Liliane M.F. Lona ◽  
Neil T. McManus ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Radical Polymerization ◽  
Polymerization Rate ◽  
Diffusion Controlled

Determination of absolute rate constants for radical polymerization of diisopropyl fumarate based on a quantitative scavenge of propagating radical

Polymer ◽  
1991 ◽  
Vol 32 (10) ◽  
pp. 1892-1896 ◽  
Author(s):  
Bunichiro Yamada ◽  
Eiichiro Yoshikawa ◽  
Kohei Shiraishi ◽  
Hiroyuki Miura ◽  
Takayuki Otsu
Keyword(s):  
Radical Polymerization ◽  
Rate Constants ◽  
Absolute Rate
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