Please use this identifier to cite or link to this item:
|Title:||Chain Transfer to Monomer and Polymer in the Radical Polymerization of Vinyl Neo-decanoate||Contributor(s):||Balic, R (author); Fellows, Christopher (author) ; van Herk, AM (author)||Publication Date:||2004||Handle Link:||https://hdl.handle.net/1959.11/1431||Abstract:||Molecular weight distributions of poly(vinyl neo-decanoate) produced by the bulk polymerization of the monomer to low conversions were investigated to obtain values of the rate constants for the chain transfer to monomer ('Cm'). The value of 'Cm' of 7.5(±0.6)x10⁻⁴ was obtained from a logarithmic plot of the number distribution at 5, 25, and 50°C, which suggests that the activation energy for chain transfer is in the order of 20-25 kJ.mol⁻¹. These plots were linear between the number and weight-average degrees of polymerization, but not over the whole molecular weight range for which a significant signal was observed in the gel permeation chromatography (GPC) trace. Modeling suggests that the deviations observed at high molecular weights can be explained by branching of the chains through chain transfer to the polymer, with a branching density as low as 10⁻⁵ , without affecting the slope at low values of the number of monomer unit, N. This deviation from the expected distribution of linear chains was used to estimate the branching densities at low conversion.||Publication Type:||Journal Article||Source of Publication:||Macromolecular Research, 12(4), p. 325-335||Publisher:||Hangug Gobunja Haghoi||Place of Publication:||South Korea||ISSN:||1598-5032||Field of Research (FOR):||030305 Polymerisation Mechanisms||Peer Reviewed:||Yes||HERDC Category Description:||C1 Refereed Article in a Scholarly Journal||Other Links:||http://www.koreascience.or.kr/article/articleresultdetail.jsp?no=36444330&searchtype=JJB&listlen=11&listno=1||Statistics to Oct 2018:||Visitors: 298
|Appears in Collections:||Journal Article|
Files in This Item:
checked on Mar 2, 2019
Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.