Next Article in Journal
Application of Melt-Blown Poly(lactic acid) Fibres in Self-Reinforced Composites
Next Article in Special Issue
The Chain Length Distribution of an Ideal Reversible Deactivation Radical Polymerization
Previous Article in Journal
Bimetallic Aluminum 5,6-Dihydro-7,7-dimethyl quinolin-8-olates as Pro-Initiators for the ROP of ε-CL; Probing the Nuclearity of the Active Initiator
Previous Article in Special Issue
Investigating the Mechanism of Horseradish Peroxidase as a RAFT-Initiase
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Polymers 2018, 10(7), 765; https://doi.org/10.3390/polym10070765

Mid-Chain Radical Migration in the Radical Polymerization of n-Butyl Acrylate

Polymat and Kimika Aplikatua Saila, University of the Basque Country UPV/EHU, Joxe Mari Korta Zentroa, Tolosa Etorbidea 72, Donostia/San Sebastián 20018, Spain
*
Author to whom correspondence should be addressed.
Received: 17 June 2018 / Revised: 5 July 2018 / Accepted: 9 July 2018 / Published: 12 July 2018
(This article belongs to the Special Issue Polymerization Kinetics)
Full-Text   |   PDF [2235 KB, uploaded 12 July 2018]   |  

Abstract

The occurrence of intramolecular transfer to polymer in the radical polymerization of acrylic monomers has been extensively documented in the literature. Whilst it has been largely assumed that intramolecular transfer to polymer leads to short chain branches, there has been some speculation over whether the mid-chain radical can migrate. Herein, by the matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry (MS) of poly(n-butyl acrylate) synthesized by solution polymerization under a range of conditions, it is shown that this mid-chain radical migration does occur in the radical polymerization of acrylates conducted at high temperatures, as is evident from the shape of the molecular weight distribution. Using a mathematical model, an initial approximation of the rate at which migration occurs is made and the distribution of branching lengths formed in this scenario is explored. It is shown that the polymerizations carried out under a low monomer concentration and at high temperatures are particularly prone to radical migration reactions, which may affect the rheological properties of the polymer. View Full-Text
Keywords: acrylates; radical polymerization; mid-chain radical acrylates; radical polymerization; mid-chain radical
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Ballard, N.; Veloso, A.; Asua, J.M. Mid-Chain Radical Migration in the Radical Polymerization of n-Butyl Acrylate. Polymers 2018, 10, 765.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top