Synthesis of comb-type block copolymers by grafting through method: electrical properties and determination of activation energy via conductivity was written by Pihtili, Guzin;Demirelli, Kadir. And the article was included in Journal of Macromolecular Science in 2020.Recommanded Product: Ethyl 4-chloro-3-oxobutanoate The following contents are mentioned in the article:
Poly[ε-CL-b-(MMA-comb-EMA)]comb-type polymers were synthesized by ATRP and ε-caprolactone macroinitiator and macromonomer. Me methacrylate macromonomer was synthesized from acylation reaction of methacryloyl chloride with PMMA ended 7-hydroxy coumarin. The macroinitiator was prepared from the reaction of chlorine acetyl chloride P(ε-CL). The synthesized polymers were characterized by FT-IR, 1H-NMR and 13C-NMR techniques. The average mol. weight and mol. weight distribution of polymers were measured by GPC method. Thermal properties of samples were studied by DSC/TGA techniques. Dielec. and Ac conductivity measurements were performed. Dielec. constant (ε’), dielec. loss factor (ε”) and conductivity behaviors of comb-type polymer were measured at room temperature between the frequency of 100-2000 Hz and over the temperature range 303-413 K at 1 kHz reported as compared with each other. Besides, their effects on the elec. properties by doping with EuCl3 for some of the comb copolymers were and were investigated. The activation energy (Ea) was calculated from conductivity We reported it was determined that the (ε’) and (ε”) values decreased with increasing frequency. There are also many application areas for comb polymers for example; nanotechnol., medicine. The aim of this study is to synthesize comb-type copolymers in different compositions and to investigate their elec. properties. This study involved multiple reactions and reactants, such as Ethyl 4-chloro-3-oxobutanoate (cas: 638-07-3Recommanded Product: Ethyl 4-chloro-3-oxobutanoate).
Ethyl 4-chloro-3-oxobutanoate (cas: 638-07-3) belongs to organic chlorides. Organochlorines are organic compounds having multiple chlorine atoms. They were the first synthetic pesticides that were used in agriculture. They are resistant to most microbial and chemical degradations. Aryl chlorides may be prepared by the Friedel-Crafts halogenation, using chlorine and a Lewis acid catalyst.Recommanded Product: Ethyl 4-chloro-3-oxobutanoate
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics