Title: Radical copolymerization of crotonyl compounds with styrene
Abstract: Abstract The monomer reactivity ratios for the radical copolymerization of crotononitrile (CN), methyl crotonate (MC), and n ‐propenyl methyl ketone (PMK) with styrene (St) were measured at 60°C. in benzene and little penultimate unit effect was shown for these systems. The values obtained were: St–CN, r 1 = 24.0, r 2 = 0; St–MC, r 1 = 26.0, r 2 = 0.01; St–PMK, r 1 = 13.7, r 2 = 0.01. The rate of copolymerization and the viscosity of the copolymer decreased markedly as the molar fraction of the crotonyl compound in the monomer mixture increased. The Q–e values were also calculated to be as follows: CN, e = 1.13, Q = 0.009; MC, e = 0.36, Q = 0.015; PMK, e = 0.61, Q = 0.024. A linear relationship was obtained between the e values of the crotonyl compounds and their Hammett constants σ m .
Publication Year: 1967
Publication Date: 1967-10-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 13
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