Wood, Murray R. published the artcileInvestigation of the Experimental Factors Affecting the Trithiocarbonate-Mediated RAFT Polymerization of Methyl Acrylate, Safety of Ethyl 2-mercaptopropanoate, the publication is Australian Journal of Chemistry (2007), 60(10), 772-778, database is CAplus.
The reversible addition-fragmentation chain transfer polymerization of acrylates, using Me acrylate (MA) as a monomer model, mediated by a trithiocarbonate was tested under several conditions where the exptl. parameters were systematically altered. The most significant parameter in controlling the rate and control of the polymerization was found to be the ratio of chain transfer agent (CTA) to initiator. Decreasing this ratio increased the rate of polymerization and had little noticeable effect on the control over mol. weight distribution. A ratio of CTA to initiator of unity was shown to give the best compromise between rate and control of the polymerization Targeted d.p. (equivalent to ratios of monomer to CTA) had negligible effect on the rate of polymerization and polydispersity index (PDI). Performing the polymerization in the presence of solvent (up to 41.2% (weight/weight) in toluene) had no neg. effect on the rate of polymerization Indeed, marginally higher conversions and lower PDIs than for bulk polymerization were achieved for similar reaction times. A higher amount of toluene (66.6% (weight/weight)) induced a lower rate of polymerization, but the evolution of mol. weight and PDI were unaffected. Polymerizations performed in the presence of toluene, N,N-dimethylformamide, and Me Et ketone showed that solvent polarity and aromaticity had no observable effect on the rate of polymerization and over the control of mol. weight distribution. The optimum conditions for the polymerization of MA, mediated by 2-ethylthiocarbonylsulfanyl-propionic acid Et ester at 50°C were found to be [CTA]/[AIBN] = 1/1 and ∼ 40% solvent (weight/weight).
Australian Journal of Chemistry published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C12H25Br, Safety of Ethyl 2-mercaptopropanoate.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics