Reference

Studies on aqueous polymerization of acrylamide

Studies on aqueous polymerization of acrylamide. Potassium persulfate/2-mercaptoethylamine hydrochloride redox system. Husain, M. Mukhtar; Misra, Sada Nand (Chem. Dep., Univ. Lucknow, Lucknow, India). Makromol. Chem., 179(1), 41-6 (English) 1978. CODEN: MACEAK. ISSN: 0025-116X. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) Evaluation of the aq. polymn. of acrylamide (I) [79-06-1] using K2S2O8 and 2-mercaptoethylamine hydrochloride (II) [156-57-0] as a redox pair showed the rate of polymn. was proportional to [K2S2O8]1.5 in the range 0.8-1.2 mmol-1, to [I]1 in the range 0.8 - 1.2 ′ 10-1 mol L-1, and to [II]1 in the range 1.0-7.0 mmol L-1, resp. The overall activation energy was 9.8 kcal mol-1. Water-miscible alcs., e.g., MeOH [67-56-1] and EtOH [64-17-5] and salts, e.g. NaCl and NaF, depressed both the rate of polymn. and the max. conversion. With MnSO4.4H2O the reverse effect occurred.

Chain transfer in radical polymerizations and end group content of resultant polymers

Chain transfer in radical polymerizations and end group content of resultant polymers. Ikada, Yoshito; Iwata, Hiroo; Nagaoka, Satoshi (Fac. Eng., Kyoto Univ., Kyoto, Japan). Macromolecules, 10(6), 1364-71 (English) 1977. CODEN: MAMOBX. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) The end-group content of polymers obtained by radical polymn. in the presence of chain-transfer agents was detd. by thin layer chromatog., and the results were compared with the theor. ones calcd. from the kinetic data. The investigated monomer-chain-transfer agent systems included styrene [100-42-5]-Cl3CCOCl [76-02-8] and methyl methacrylate [80-62-6]-HSCH2CH2NH2×HCl [156-57-0]. Azodiisobutyronitrile was used as the initiator. Good agreement was found between the exptl. detd. and calcd. content of the end-groups in the polymers.