Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 62: Issue 1
Characteristic Events in Free Radical Polymerization of Lower n-alkyl Methacrylates
Authors:
R. Radičević University of Novi Sad Faculty of Technology Bulevar Cara Lazara 1 Novi Sad Yugoslavia Bulevar Cara Lazara 1 Novi Sad Yugoslavia

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D. Stoiljković University of Novi Sad Faculty of Technology Bulevar Cara Lazara 1 Novi Sad Yugoslavia Bulevar Cara Lazara 1 Novi Sad Yugoslavia

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J. Budinski-Simendić University of Novi Sad Faculty of Technology Bulevar Cara Lazara 1 Novi Sad Yugoslavia Bulevar Cara Lazara 1 Novi Sad Yugoslavia

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Pages:
237–249
Online Publication Date:
02 Nov 2004
Publication Date:
01 Oct 2000
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1010135400465
Keywords:
n-alkyl methacrylates; autoacceleration; characteristic events; polymerization
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Abstract  

It is well known that the free radical bulk polymerization of lower n-alkyl methacrylates is characterized by autoacceleration after definite conversions of the monomers. The conversion vs.time curves of polymerization have a typical 'S' shape. There are several characteristic points in these curves: the onset of autoacceleration (point M), the maximum in the polymerization rate (point S) and the end of the polymerization (point K). We have observed points P and R (maximum and minimum of autoacceleration) as inflection points in the derived polymerization rate vs. time curve. In this work, the free radical bulk polymerizations of methyl, ethyl and butyl methacrylates were investigated by differential scanning calorimetry. The effects of the polymerization temperature and the alkyl group length in the esters on the monomer conversions at the points M, P, S, R and K were studied. By regression analysis of the experimental results, relations were developed with which it is possible to predict the positions of the characteristic points, depending on the polymerization temperature and the alkyl group length.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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