The purpose of the present invention is to provide an acid anhydride group-containing block copolymer capable of providing a resin sheet which can have both superior adhesiveness and transparency. The acid anhydride group-containing block copolymer according to the present invention contains an acid ...
293 Acyclic pentapeptide 317 was then cyclized to cycloaspeptide E 318 using the cyclic anhydride propane-1-phosphonic anhydride (T3P)294 in 67% yield. Sign in to download full-size image Scheme 78. Synthesis of cycloaspeptide E using Fmoc-acid chloride strategy....
Finally, treatment of rosins with dienophiles such as maleic anhydride gives useful monounsaturated polycarboxylic structures through cycloaddition (Diels-Alder reaction). These have been used as such or after hydrolysis, and also in the synthesis of polyimides. The Diels-Alder adduct of rosin with ...
introducing a cyclic dicarboxylic acid anhydride into the polyether polyol; allowing the reactant to react with an epoxide having polymerizable double bonds; ... 戚渭新,▲趙▼宝成,▲韓▼勇,... 被引量: 0发表: 2022年 The oxygen-absorbing resin composition and the oxygen-absorbing adhesive resin...
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In 1960 Nordman and co-workers further suggested that in the anhydrous form two molecules of the acid are linked through hydrogen bonds between two –COOH groups of each monomer. Uses citric acid has astringent and anti-oxidant properties. It can also be used as a product stabilizer, pH adju...
Pre-polymer synthesis was performed based on procedures adapted from Tran et al.63using a melt poly-condensation reaction. Citric acid (CA), maleic anhydride (MA), and 1,8-octanediol (OD) monomers were placed in a moisture-free 500 mL three-necked round bottom flask under nitrogen atmosphe...
the Li–O peak at 550 cm−1observed at the IR spectrum of HFA-Li is indicative of the formation of the Li–O bonds through the reaction between Li and carboxylic acid. Figure2cshows the optical images of Li metal anodes before and after the treatment. No apparent change in the colo...
with the A-431 cells observed to be properly attached to the surface of the mats. Croisier et al. [155] described chitosan-coated, charged electrospun fibers based on electrospinning a mixture of PCL with a poly(MMA-MA)copolymerofmethyl methacrylateandmaleic anhydride, making it negatively charg...
The anhydride formation may also take place between carboxyl groups of CMC and carboxyl groups of fumaric acid. The crosslinking mechanism of carboxymethyl cellulose/chitosan hydrogels is presented in Fig. 16. Sign in to download hi-res image Fig. 16. Crosslinking mechanism of carboxymethyl ...