Detail of "126-99-8"

Reference

1-Butadienyl sulfide polymerization

1-Butadienyl sulfide polymerization. Jones, G. D.; Doorenbos, H. E. (Cent. Res., Dow Chem. Co., Midland, MI 48640, USA). J. Macromol. Sci. 689-97-4 and 101-68-8 which are cas registry numbers are also used here., Chem., A21(2), 155-66 (English) 1984. CODEN: JMCHBD. ISSN: 0022-233X. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 23 1-Butadienyl sulfides, mainly cis in configuration, were obtained by the base-catalyzed addn. of mercaptans to vinylacetylene (I) [689-97-4]. Bis-1-butadienyl sulfides were readily polymerizable using azo catalysts, but mono-1-butadienyl sulfides were not, nor did they copolymerize with styrene or butadiene. The mono-1-butadienyl sulfides had high Q-value and copolymd. well with other high Q monomers, such as chlorostyrene [1331-28-8] and chloroprene [126-99-8]. Bis-1-butadienyl sulfides were made by reacting a dithiol, such as bis-(4-mercaptophenyl) ether [17527-79-6] with I or by a 2-step process using mercaptoethanol [60-24-2] followed by treatment of 2-hydroxyethylthiobutadiene [89482-20-2] with diisocyanate. The polymers were largely of 1,4-trans polydiene structure. .

Relation between kinetics of emulsion polymerization and transport of components of a polymerization system

Relation between kinetics of emulsion polymerization and transport of components of a polymerization system. Arutyunyan, R. S.; Beileryan, N. M. (Erevan. Gos. Univ., Yerevan, USSR). Vysokomol. Soedin., Ser. B, 25(9), 683-5 (Russian) 1983. CODEN: VYSBAI. ISSN: 0507-5483. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) An increase in the concns. of Antioxidant 2246 [119-47-1] and antioxidant P-23 [732-26-3] decreased the initial polymn. rate and solubilization in the emulsion polymn. of chloroprene [126-99-8] and Me methacrylate [80-62-6] but had no effect on the emulsion polymn. of styrene (I) [100-42-5]. The rates of monomer entry into the micelles were lower than the polymn. rates by 1 order of magnitude and should det. the overall rate if polymn. 119-47-1 and 80-62-6 are cas registry numbers of chemicals which are used as reagents here. occurred in the micelles. An increase in the concn. of Na alkylbenzenesulfonate emulsifier increased the polymn. rate of I to a const. max. value while increasing its solubilization, and an increase in the amt. of MeOH [67-56-1] added to the reaction mixt. increased and then decreased the rate of emulsion polymn. of I while decreasing its solubilization. Thus, the emulsion polymn. does not always start in the micelles. .