Detail of "2004-70-8"

Reference

Emulsion polymerization of cis- and trans-1,3-pentadienes initiated by rhodium(III) chloride

Emulsion polymerization of cis- and trans-1,3-pentadienes initiated by rhodium(III) chloride. Entezami, Ali Akbar; Mechin, Robert; Schue, Francois; Collet, Andre; Kaempf, Bernd (Lab. Chim. Org. Appl., Inst. Chim. B. P., Strasbourg, Fr.). Eur. Polym. J., 13(3), 193-201 (French) 1977. CODEN: EUPJAG. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) In the aq. emulsion polymn. of cis-1,3-pentadiene [1574-41-0] and trans-1,3-pentadiene [2004-70-8] by RhCl3 there was no induction period. The effects of initiator concn. and pH on polymn. rate were studied. The active species was taken to be a Rh(III) hydride, with monomer inserting between Rh and H and a .pi.-allyl complex being formed.

Cationic copolymers of isobutylene

Cationic copolymers of isobutylene. 7. Reactivity ratio determination by sequence distributions obtained through NMR analysis. Corno, Carlo; Priola, Aldo; Spallanzani, G.; Cesca, Sebastiano (ASSORENI, San Donato Milanese 20097, Italy). Macromolecules, 17(1), 37-41 (English) 1984. CODEN: MAMOBX. ISSN: 0024-9297. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) The monomer sequence fractions obtained from the 1H and 13C NMR spectra of the cationic copolymers of isobutylene (I) [115-11-7] with isoprene (II) [78-79-5], trans-1,3-pentadiene (III) [2004-70-8], 2,3-dimethylbutadiene (IV) [513-81-5] were used for calcg. their reactivity ratios. A nonlinear regression anal. utilizing a simplex algorithm and an objective function value permitted the computation of the confidence limits with a defined degree of significance. A comparative test of the first- and second-order Markovian models for the best fit of the exptl. data was performed. The reactivity ratios of I-II copolymn. were independent of the degree of conversion, feed compn., and type of catalyst. The values obtained were rI = 1.56 ± 0.19, rII = 0. 78-79-5 and 513-81-5 are cas registry numbers of chemicals which are used as reagents here.95 ± 0.17; rI = 0.59 ± 0.09, rIII = 1.03 ± 0.19; and rI = 3.20 ± 1.10, rIV = 0.98 ± 0.53 (95% confidence limits). .