Controlled radical copolymerization of N-(4-hydroxyphenyl) maleimide and styrene based on RAFT process was written by Lu, Yan-bing;Sun, Rong-xin;Sun, Li-li;Xia, Xin-nian;Xu, Wei-jian. And the article was included in Gaofenzi Cailiao Kexue Yu Gongcheng in 2009.Quality Control of Benzyl benzodithioate This article mentions the following:
Copolymerization of N-(4-carboxyphenyl) maleimide with styrene was introduced in THF by taking S-benzyl dithiobenzoate as a RAFT reagent. Results show that the number average mol. weight of the obtained copolymers increases linearly with the increase of the monomer conversion and the distributions of the copolymers are less than 1.5, showing that the RAFT regent S-benzyl dithiobenzoate possesses a good ability to control the copolymerization of N-(4-carboxyphenyl) maleimide, with styrene. Investigations of the copolymerization at different temperatures gave the apparent activation energy about 1.39 kJ/mol. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Quality Control of Benzyl benzodithioate).
Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Quality Control of Benzyl benzodithioate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics