New results of the free radical ring-opening polymerization |
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Authors: | J rg Letsch,Elisabeth Klemm |
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Affiliation: | Jörg Letsch,Elisabeth Klemm |
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Abstract: | The reaction of 5-ring ketene-O, N-acetals with peroxides was investigated. It was shown that benzoyl peroxide adds to monomers 5a and 5b by ring opening, giving the corresponding linear diester amides 6a and 6b , respectively. The ketene-O,N-acetal 5c adds benzoyl peroxide, without ring opening, by addition to the exomethylene group, giving the cyclic-O,N-acetal diester 6c . With phthaloyl peroxide cyclic esteramides 7 and oligomeric products are formed. The chemical structures of the addition products were confirmed by NMR spectra and elemental analysis. © 1994 John Wiley & Sons, Inc. |
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Keywords: | radical ring-opening polymerization keten-O, N-acetal cyclic esteramide benzoyl peroxide |
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