Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/102877
Type: Artigo de evento
Title: Tempo-mediated Polymerization Of Styrene Using Mono And Bifunctional Initiators
Author: Dias R.S.
Goncalves M.C.
Lona L.M.F.
Abstract: With the purpose of enhancing the reaction rate of nitroxide-mediated radical polymerization of styrene (NMRP) in presence of TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy), keeping the livingness of the system, the effect of a bi-functional initiator has been examined, a new approach. The monomer used was the styrene, the stable radical was TEMPO, the mono-functional initiators were BPO and Luperox TBEC, and the bi-functional initiator was Luperox L531. The polymerization reactions were carried out in ampoules at 125°C, according to the bi-molecular technique. The conversion was evaluated by a gravimetric method, and the molecular weight distribution and the polydispersity of the polymer were analyzed by SEC (Size-Exclusion Chromatography). The effects of the use of the bifunctional initiator and the mono-functional ones with different half-life times have been evaluated. It was demonstrated that by using the bi-functional initiator L531, the reaction rate was increased when comparing to the performance of the mono-functional initiatiors, under the conditions of the reaction.
Editor: 
Rights: fechado
Identifier DOI: 
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-34748923493&partnerID=40&md5=6933ce40f30a7c84dbc02ed06dc9f4d5
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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