The radical copolymerization of allyl esters with vinyl acetate has been studied in the range from 10 to 90 mol % allyl esters in the feed. The Kelen‐Tüdos method was employed to determine the monomer reactivity ratios. The following values were found for the reactivity ratios: allyl propionate (M1)–vinyl acetate (M2), r1 = 0.42, r2 = 1.29; allyl butyrate (M1)–vinyl acetate (M2), r1 = 0.64, r2 = 0.97; allyl isobutyrate (M1)–vinyl acetate (M2), r1 = 0.51, r2 = 1.04; allyl valerate (M1)–vinyl acetate (M2), r1 = 0.58, r2 = 1.07; allyl trimethylacetate (M1)–vinyl acetate (M2), r1 = 0.34, r2 = 1.15. The Q‐e parameters were calculated from the allyl esters (M1)–vinyl acetate (M2) reactivity ratios. The e parameters of allyl ester monomers have been found to be nicely correlated with parameters such as dissociation constants of carboxylic acids, which are constituents of allyl ester monomers, and Taft σ* constants of the alkyl group in the acids. The molecular weights of copolymers were measured by GPC and ranged from (1.0–15.0) × 104.
Studies have been made to remove arsenate in waste water with an adsorbent prepared by binding hydrous iron(III) oxide with polyacrylamide. Arsenate anions were thus adsorbed over the pH range of 5–8; the adsorption capacity of arsenate was 43 mg per gram of the adsorbent.
The radical copolymerization of allyl chloroacetates with vinyl acetate has been studied in the feed range from 10 to 90mol% allyl chloroacetates. The following values were obtained by the Kelen -Tiidos method for the reactivity ratios: allyl acetate (M 1)-vinyl acetate (M 2 ), r 1 =0.43, r2 = 1.8; allyl chloroacetate (M 1 )--vinyl acetate (M 2 ), r 1 =0.69, r2 =0.77; allyl dichloroacetate (M 1 )-vinyl acetate (M 2 ), r 1 = 0.54, r2 = 0.57; allyl trichloroacetate (M 1 ) vinyl acetate (M 2 ), r 1 =0.28. r2 =0.41; The Q-e parameters were calculated from the allyl (M 1 )-vinyl acetate (M 2 ) reactivity ratios. The e parameters of allylic monomers have been found to be well correlated with parameters such as Taft's u* constants of the chloroalkyl group an acids, 13 C NMR chemical shift values of they carbon in the allylic monomers, and[,R for the y carbon of allyl group in the allylic monomers. The rate of copolymerization of allyl chloroacetates and conversion to copolymers increased as one goes from allyl alkanoates, such as allyl acetate, allyl butyrate, and allyl trimethylacetate, to allyl chloroacetates, though molecular weights of the copolymers diminished due to the chlorine abstraction by a growing chain.
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