CHAIN TRANSFER CONSTANT OF VINYLPYRROLIDONE WITH DEXTRAN

1962 ◽  
Vol 66 (5) ◽  
pp. 828-829 ◽  
Author(s):  
Kwei-ping S. Kwei ◽  
F. R. Eirich
Keyword(s):  
Chain Transfer ◽  
Transfer Constant ◽  
Chain Transfer Constant

Methyl methacrylate polymerization involving a cobalt ortho-iminobenzosemiquinone complex: Determination of the chain transfer constant

2015 ◽  
Vol 56 (3) ◽  
pp. 267-275 ◽  
Author(s):  
E. V. Kolyakina ◽  
Yu. E. Ovchinnikova ◽  
I. D. Grishin ◽  
A. I. Poddel’skii ◽  
D. F. Grishin
Keyword(s):  
Methyl Methacrylate ◽  
Chain Transfer ◽  
Transfer Constant ◽  
Methyl Methacrylate Polymerization ◽  
Chain Transfer Constant

scholarly journals Effect of bulky 2,6-bis(spirocyclohexyl)-substituted piperidine rings in bis(hindered amino)trisulfide on thermal healability of polymethacrylate networks

2021 ◽  
Author(s):  
Motohiro Aiba ◽  
Take-aki Koizumi ◽  
Kazuaki Okamoto ◽  
Motoshi Yamanaka ◽  
Michinari Futamura ◽  
...  
Keyword(s):  
Chain Transfer ◽  
Moderate Temperature ◽  
Transfer Constant ◽  
Chain Transfer Constant

Bulky 2,6-bis(spirocyclohexyl)-substituted piperidine rings in bis(hindered amino)trisulfide affords low chain-transfer constant and thermal healability at moderate temperature.

scholarly journals Further Effects of Chain-Length-Dependent Reactivities on Radical Polymerization Kinetics

2007 ◽  
Vol 60 (10) ◽  
pp. 754 ◽  
Author(s):  
Johan P. A. Heuts ◽  
Gregory T. Russell ◽  
Gregory B. Smith
Keyword(s):  
Molecular Weight ◽  
Radical Polymerization ◽  
Chain Length ◽  
Chain Transfer ◽  
Transfer Constant ◽  
Molecular Weight Distributions ◽  
Weight Distributions ◽  
A Chain ◽  
Chain Transfer Constant ◽  
Independent Chain

In the present paper, we finalize some threads in our investigations into the effects of chain-length-dependent propagation (CLDP) on radical polymerization kinetics, confirming all our previous conclusions. Additionally, and more significantly, we uncover some unexpected and striking effects of chain-length-dependent chain transfer (CLDTr). It is found that the observed overall rate coefficients for propagation and termination (and therefore the rate of polymerization) are not significantly affected by whether or not chain transfer is chain-length dependent. However, this situation is different when considering the molecular weight distributions of the resulting polymers. In the case of chain-length-independent chain transfer, CLDP results in a considerable narrowing of the distribution at the low molecular weight side of the distribution in a chain-transfer controlled system. However, the inclusion of both CLDP and CLDTr yields identical results to classical kinetics – in these latter two cases, the molecular weight distribution is governed by the same chain-length-independent chain transfer constant, whereas in the case of CLDP only, it is governed by a chain-length-dependent chain transfer constant that decreases with decreasing chain length, thus enhancing the probability of propagation for short radicals. Furthermore, it is shown that the inclusion of a very slow first addition step has tremendous effects on the observed kinetics, increasing the primary radical concentration and thereby the overall termination rate coefficient dramatically. However, including possible penultimate unit effects does not significantly affect the overall picture and can be ignored for the time being. Lastly, we explore the prospects of using molecular weight distributions to probe the phenomena of CLDP and CLDTr. Again, some interesting insights follow.

Chain-Transfer Constant

2016 ◽  
Author(s):  
Stanisław Penczek ◽  
Graeme Moad
Keyword(s):  
Chain Transfer ◽  
Transfer Constant ◽  
Chain Transfer Constant

Chain-transfer constant of fluoroalcohols

1969 ◽  
Vol 7 (10) ◽  
pp. 2829-2836 ◽  
Author(s):  
Indrajit Kar ◽  
B. M. Mandal ◽  
S. R. Palit
Keyword(s):  
Chain Transfer ◽  
Transfer Constant ◽  
Chain Transfer Constant
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