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Type: Artigo de periódico
Title: Analyzing the Real Advantages of Bifunctional Initiator over Monofunctional Initiator in Free Radical Polymerization
Author: Machado, PFDPB
Lona, LMF
Abstract: Monofunctional initiators are extensively used in free radical polymerization. To enhance productivity, a higher temperature is usually used; however, this leads to lower molecular weights. Bifunctional initiators can increase the polymerization rate without decreasing the average molecular weight and this can be desirable. A bifunctional initiator is an important issue to be investigated, and it is of great interest to industries. The objective of this work is to study polymerization reactions with mono- and bi-functional initiators through comprehensive mathematical models. Polystyrene is considered as case study. This work collects and presents some experimental data available in literature for polymerization using two different types of bifunctional initiators. Model prediction showed good agreement with experimental data. It was observed that the initial initiator concentration has a huge impact on the efficiency of initiators with functionality bigger than one and high concentrations of bifunctional initiator make the system behave as if it were a system operating with monofunctional initiator. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 117: 2803-2816, 2010
Subject: polymerization
monofunctional initiator
bifunctional initiator
Country: EUA
Editor: John Wiley & Sons Inc
Citation: Journal Of Applied Polymer Science. John Wiley & Sons Inc, v. 117, n. 5, n. 2803, n. 2816, 2010.
Rights: fechado
Identifier DOI: 10.1002/app.32010
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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