Ester is a chemical compound derived from an oxoacid (organic or inorganic) in which at least one –OH hydroxyl group is replaced by an –O– alkyl (alkoxy) group, 2495-37-6, formula is C11H12O2, Name is Benzyl methacrylate. as in the substitution reaction of a carboxylic acid and an alcohol. Recommanded Product: Benzyl methacrylate.
Dadashi-Silab, Sajjad;Kim, Khidong;Lorandi, Francesca;Schild, Dirk J.;Fantin, Marco;Matyjaszewski, Krzysztof research published 《 Effect of halogen and solvent on iron-catalyzed atom transfer radical polymerization》, the research content is summarized as follows. Efficient transfer of halogen atoms is essential for controlling the growth of polymers in atom transfer radical polymerization (ATRP). The nature of halogens may influence the efficiency of the halogen atom transfer during the activation and deactivation processes. The effect of halogens can be associated with the C-X bond dissociation energy and the affinity of the halogens/halides to the transition metal catalyst. In this paper, we study the effect of halogens (Br vs. Cl) and reaction media in iron-catalyzed ATRP in the presence of halide anions as ligands. In Br-based initiating systems, polymerization of methacrylate monomers was well-controlled, whereas Cl-based initiating systems provided limited control over the polymerization The high affinity of the Cl atom to the iron catalyst renders it less efficient for fast deactivation of growing chains, resulting in polymers with mol. weights higher than predetermined by Δ[M]/[RX]o and with high dispersities. Conversely, Br can be exchanged with higher efficiency and hence provided good control over polymerization Decreasing the polarity of the reaction medium improved the polymerization control. Polymerizations using ppm levels of the iron catalyst in acetonitrile (a more polar solvent) yielded polymers with larger dispersity values due to the slow rate of deactivation as opposed to the less polar solvent anisole, which afforded well-controlled polymers with dispersity <1.2.
Recommanded Product: Benzyl methacrylate, Benzyl methacrylate, also known as Benzyl methacrylate, is a useful research compound. Its molecular formula is C11H12O2 and its molecular weight is 176.21 g/mol. The purity is usually 95%.
Benzyl methacrylate is a chemical compound that belongs to the group of benzyl compounds. It has a copolymer structure with methyl ethyl methacrylate (MEMA) and hydroxyl groups. Benzyl methacrylate is produced by polymerization of benzyl chloride with allyl carbonate in the presence of radiation, forming a polymeric matrix. The morphology of this copolymer depends on the length of the benzyl chains and the concentration of MEMA., 2495-37-6.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics