Functional end-group polymers derived from free-radical chain transfer. I. Kinetic prediction of functionality

1977 ◽  
Vol 15 (6) ◽  
pp. 1423-1430 ◽  
Author(s):  
R. D. Athey ◽  
W. A. Mosher ◽  
N. W. Weston
Keyword(s):  
Free Radical ◽  
Chain Transfer ◽  
Radical Chain ◽  
End Group

scholarly journals End-group-functionalized poly(N,N-diethylacrylamide) via free-radical chain transfer polymerization: Influence of sulfur oxidation and cyclodextrin on self-organization and cloud points in water

2014 ◽  
Vol 10 ◽  
pp. 680-691 ◽  
Author(s):  
Sebastian Reinelt ◽  
Daniel Steinke ◽  
Helmut Ritter
Keyword(s):  
Free Radical ◽  
Cloud Point ◽  
Chain Transfer ◽  
Sulfur Oxidation ◽  
Degree Of Polymerization ◽  
Functionalized Polymers ◽  
Solution Temperature ◽  
Radical Chain ◽  
Chain Transfer Polymerization ◽  
End Group

In this work we report the synthesis of thermo-, oxidation- and cyclodextrin- (CD) responsive end-group-functionalized polymers, based on N,N-diethylacrylamide (DEAAm). In a classical free-radical chain transfer polymerization, using thiol-functionalized 4-alkylphenols, namely 3-(4-(1,1-dimethylethan-1-yl)phenoxy)propane-1-thiol and 3-(4-(2,4,4-trimethylpentan-2-yl)phenoxy)propane-1-thiol, poly(N,N-diethylacrylamide) (PDEAAm) with well-defined hydrophobic end-groups is obtained. These end-group-functionalized polymers show different cloud point values, depending on the degree of polymerization and the presence of randomly methylated β-cyclodextrin (RAMEB-CD). Additionally, the influence of the oxidation of the incorporated thioether linkages on the cloud point is investigated. The resulting hydrophilic sulfoxides show higher cloud point values for the lower critical solution temperature (LCST). A high degree of functionalization is supported by 1H NMR-, SEC-, FTIR- and MALDI–TOF measurements.

Electron Transference in Free Radical Chain Transfer Reactions

Nature ◽  
1964 ◽  
Vol 202 (4933) ◽  
pp. 690-691 ◽  
Author(s):  
JAY K. KOCHI ◽  
DENNIS D. DAVIS
Keyword(s):  
Free Radical ◽  
Chain Transfer ◽  
Transfer Reactions ◽  
Radical Chain

scholarly journals THE STRUCTURE OF BUTADIENE DIMERS PRODUCED BY A FREE-RADICAL CHAIN-TRANSFER MECHANISM

1957 ◽  
Vol 35 (12) ◽  
pp. 1467-1474 ◽  
Author(s):  
L. J. Gendron ◽  
R. V. V. Nicholls
Keyword(s):  
Free Radicals ◽  
Free Radical ◽  
Chain Transfer ◽  
Transfer Mechanism ◽  
The Other ◽  
Chain Transfer Agent ◽  
Radical Chain

Butadiene was dimerized by using acetyl peroxide as source of free radicals and chloroform as solvent and chain-transfer agent. The dimers were identified and their structures were determined by means of ozonolysis and oxidative hydrolysis. It was established that two dimers were produced in nearly equal amount. One dimer was formed only by 1,4-additions, the other only by 1,2-additions. This result implies that polybutadienes may be mixtures of two varieties: one variety resulting from 1,4-additions, the other from 1,2-additions.

Isotopic Investigation of Hydrogen Transfer Related to Cobalt-Catalyzed Free-Radical Chain Transfer

1996 ◽  
Vol 15 (24) ◽  
pp. 5116-5126 ◽  
Author(s):  
Alexei A. Gridnev ◽  
Steven D. Ittel ◽  
Bradford B. Wayland ◽  
Michael Fryd
Keyword(s):  
Free Radical ◽  
Hydrogen Transfer ◽  
Chain Transfer ◽  
Radical Chain ◽  
Isotopic Investigation
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