A new methodology has been developed for the one-pot synthesis of a branched polymethyl methacrylate material. Employing a cross-linking comonomer and large amount of a chain transfer agent, a fully soluble material is produced through a conventional free radical reaction. It is thought that despite the presence of the cross-linker, a network is not formed due to the high chain transfer agent concentration instead resulting in a soluble polymer with a highly branched structure. Branched polymers are of interest for their unusual flow and viscometric properties, and this material is particularly attractive due to the relatively cheap and simple synthetic route. To better understand the mechanism of the reaction, an online monitoring system, the PL-PMC, was used to monitor the contents of the reactor at near real time during the polymerisation. A continuous stream of sample from the reactor was diluted to an appropriated level and injected into a rapid GPC analysis system comprising a differential refractive index detector, an online viscometer and a short GPC column to allow measurements in a ‘flow injection analysis’ mode. Measurements of bulk molecular weight and intrinsic viscosity parameters were made during synthesis, allowing the growth of the polymer to be closely followed. From the intrinsic viscosity measurements, the development of the branched structure was investigated as a function of reaction time. The final product was then isolated and investigated by offline analytical multi detector GPC to complete the study. Combining the data from the online monitoring investigation and the offline analysis of the final product, considerable insights into the reaction process were obtained from a single reaction.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and ultrastructural studies of styrene-divinylbenzene Polyhipe polymersP. Hainey, I. M. Huxham, B. Rowatt, D. C. Sherrington, and L. TetleyCite this: Macromolecules 1991, 24, 1, 117–121Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published inissue 1 January 1991https://pubs.acs.org/doi/10.1021/ma00001a019https://doi.org/10.1021/ma00001a019research-articleACS PublicationsRequest reuse permissionsArticle Views1776Altmetric-Citations176LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
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