12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Polymerisation of methyl methacrylate initiated...
View graph of relations

« Back

Polymerisation of methyl methacrylate initiated by ozonates of Tetramethylethene.

Research output: Contribution to journalJournal article

Published

Journal publication date03/2001
JournalPolymer
Journal number5
Volume42
Number of pages11
Pages1797-1807
Original languageEnglish

Abstract

It is confirmed that the major products of ozonolysis of tetramethylethene (TME) in butyl acetate at temperatures between −60 and 20°C are the cyclic peroxides, acetone diperoxide and acetone triperoxide plus, at low temperatures, species which may be open-chain oligoperoxides. Solutions of ozonized TME are able to initiate polymerizations of methyl methacrylate at temperatures above 60°C. ESR spectroscopy has shown that acetone diperoxide does not generate significant concentrations of radicals below 140°C, so that the chief initiating species below this temperature must be acetone triperoxide and the oligoperoxides. Despite the fact that these species have different structures, indicated by their differing retention times in GC and also their different mass spectra, they behave kinetically as one species, i.e. conversions to polymer after polymerization times of 1 h in the presence of ozonized TME are identical regardless of ozonolysis temperature.