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- W2080136652 abstract "The free radical copolymerization of ethene (ET) with acrylonitrile (AN) in the presence of carboxylic acids has been studied. Carboxylic acids and trifluoroacetic acid (TFA) in particular were found to be useful complexing agents for acrylonitrile with regard to the alternating copolymerization with ethene. The complexation via hydrogen bonding could be observed by IR analysis of the stretching frequency of the nitrile group in the monomer. The complex formation resulted in a decrease of the copolymerization parameter r1 of the complexed and the uncomplexed comonomer acrylonitrile, which was found to decrease with increasing TFA/AN ratio. The degree of alternation could be increased by increasing the TFA/AN or the ET/AN ratio in the initial polymerization mixture. Almost strictly alternating copolymers were obtained with TFA as solvent. The copolymers showed high crystallinity and melting temperatures similar to the strictly alternating copolymer, which has been synthesized in the presence of EtAlCl2 as a Lewis acid." @default.
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- W2080136652 date "1996-01-01" @default.
- W2080136652 modified "2023-10-18" @default.
- W2080136652 title "Copolymerization of Acrylonitrile and Ethene in the Presence of Trifluoroacetic Acid as Complexing Agent" @default.
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- W2080136652 doi "https://doi.org/10.1021/ma9601528" @default.
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