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Radiologic findings in acute childhood asthma.
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1978
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The synthesis of statistical copolymers consisting of 2-ethyl-2-oxazoline\n(EtOx) and 2-‘‘soy alkyl’’-2-oxazoline (SoyOx) via a microwave-assisted cationic ringopening\npolymerization procedure is described. The majority of the resulting copolymers\nrevealed polydispersity indices below 1.30. The reactivity ratios (rEtOx 1.4 6 0.3;\nrSoyOx ¼ 1.7 6 0.3) revealed a clustered monomer distribution throughout the polymer\nchains. The thermal and surface properties of the pEtOx-stat-SoyOx copolymers\nwere analyzed before and after UV-curing demonstrating the decreased chain mobility\nafter cross-linking. In addition, the cross-linked materials showed shape-persistent\nswelling upon absorption of water from the air, whereby as little as 5 mol %\nSoyOx was found to provide efficient cross-linking.