Silanes as Chain Transfer Agents in Metallocene-Mediated Olefin Polymerization. Facile in Situ Catalytic Synthesis of Silyl-Terminated Polyolefins

1995 ◽  
Vol 117 (43) ◽  
pp. 10747-10748 ◽  
Author(s):  
Peng-Fei Fu ◽  
Tobin J. Marks
Keyword(s):  
Chain Transfer ◽  
Olefin Polymerization ◽  
Catalytic Synthesis ◽  
Transfer Agents

In situ xanthate deprotection to generate thiol chain transfer agents for conventional free radical linear and branched vinyl polymerization

2017 ◽  
Vol 55 (24) ◽  
pp. 3963-3967 ◽  
Author(s):  
Sean Flynn ◽  
Simon D. Dale ◽  
Andrew B. Dwyer ◽  
Pierre Chambon ◽  
Steve P. Rannard
Keyword(s):  
Free Radical ◽  
Chain Transfer ◽  
Vinyl Polymerization ◽  
Transfer Agents

Plasticization by in Situ Grafted Acrylates II—Effect of Graft Structure

1985 ◽  
Vol 58 (1) ◽  
pp. 146-153
Author(s):  
Roger J. Eldred
Keyword(s):  
Low Temperature ◽  
Chain Transfer ◽  
Direct Result ◽  
Acrylate Monomer ◽  
A Chain ◽  
Low Temperature Flexibility ◽  
Acrylate Monomers ◽  
Better Than ◽  
Transfer Agents

Abstract Grafting of acrylate monomers, such as 2-ethylhexyl acrylate, onto nitrile rubber during the cure cycle leads to improved low temperature flexibility. The effect of graft structure on the improvement was determined by utilizing chain transfer agents to reduce the molecular weight and increase the number of grafts. In every instance, incorporation of a chain transfer agent led to a compound with greater low-temperature flexibility than a control. The amount of improvement was correlated with the effectiveness of each additive in chain transfer reactions. Since there was no evidence of either degradative chain transfer or changes in cure state, it was concluded that the increased low-temperature flexibility was a direct result of alterations in the graft structure. The plasticization achieved with chain transfer agents and 2-ethylhexyl acrylate monomer was better than previously obtained using more effective acrylic monomers without the additives. This means that the structure of the graft is the major factor in determining the effectiveness of in situ grafted acrylate monomers as plasticizers.

Pseudoliving polymerization of vinyl acetate mediated by reversible addition-fragmentation chain-transfer agents

2011 ◽  
Vol 53 (7-8) ◽  
pp. 437-447 ◽  
Author(s):  
E. V. Chernikova ◽  
V. V. Yulusov ◽  
K. O. Mineeva ◽  
V. B. Golubev ◽  
E. S. Garina
Keyword(s):  
Vinyl Acetate ◽  
Chain Transfer ◽  
Reversible Addition ◽  
Transfer Agents
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