Dibenzyl trithiocarbonate mediated reversible addition-fragmentation chain transfer polymerization of acrylonitrile

Autor:	Xian-Feng Lu, Jing-Yu Liu, Xiaohui Liu, Yue-Sheng Li, Guibao Zhang, Ding Pan
Rok vydání:	2005
Předmět:	Kinetic chain length Polymers and Plastics Chemistry Organic Chemistry Radical polymerization Solution polymerization Chain transfer Photochemistry chemistry.chemical_compound Polymerization Polymer chemistry Materials Chemistry Precipitation polymerization Copolymer Acrylonitrile
Zdroj:	Journal of Polymer Science Part A: Polymer Chemistry. 44:490-498
ISSN:	1099-0518 0887-624X
DOI:	10.1002/pola.21169
Popis:	Reversible addition-fragmentation chain transfer polymerization has been successfully applied to polymerize acrylonitrile with dibenzyl trithiocarbonate as the chain-transfer agent. The key to success is ascribed to the improvement of the interchange frequency between dormant and active species through the reduction of the activation energy for the fragmentation of the intermediate. The influence of several experimental parameters, such as the molar ratio of the chain-transfer agent to the initiator [azobis(isobutyronitrile)], the molar ratio of the monomer to the chain-transfer agent, and the monomer concentration, on the polymerization kinetics and the molecular weight as well as the polydispersity has been investigated in detail. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and H-1 NMR analyses have confirmed the chain-end functionality of the resultant polymer.
Databáze:	OpenAIRE
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