Poly(vinyl alcohol) (a), its partially hydrolyzed product or poly(vinyl alcohol-co-vinyl acetate) (b) and poly(ethylene-co-vinyl alcohol) (c) are all industrially significant polymers used mainly for fiber and film, size and emulsifier/stabilizer, and gas-barrier material, respectively. In this thesis, these vinyl alcohol-based polymers have been discussed from two aspects: the molecular struct...

New copolymers from hindered amines and vinyl monomers were synthesized by radical chain polymerization. To obtain polymeric HALS, acrylamide-(1ATP) and acrylate-(4ATP) monomers, derivatives from 2,2,6,6-tetramethylpiperidine and 2,2,6,6-tetramethyl-4-piperidinol were synthesized. The radical chain polymerization of 1ATP with styrene (Sty) using 1-butanethiol (BTN) resulted in a copolymer with ...

In this study, Co/Cu-decorated carbon nanofibers are introduced as novel electrocatalyst for methanol oxidation. The introduced nanofibers have been prepared based on graphitization of poly(vinyl alcohol) which has high carbon content compared to many polymer precursors for carbon nanofiber synthesis. Typically, calcination in argon atmosphere of electrospun nanofibers composed of cobalt acetat...

In this work, lignin-vinyl acetate copolymers containing different fractions of lignin were synthesized by the copolymerization technique. The copolymer was successfully applied to coat paper for enhancing its properties and performance. effects on physicochemical, air permeability mechanical investigated. strength, hydrophilic, coated improved with increasing content lignin. Lignin-vinyl 15% e...

Methanolic extracts of rice hulls with or without far infrared (FIR) irradiation were sequentially fractionated with solvents (hexane, chloroform, ethyl acetate, butanol, and water), and antioxidant activities of the fractions were analyzed for total phenol contents (TPC), 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging capability, reducing power, and antioxidant potency. Yield of chlor...

Kinetic resolution is one of the methods which allows obtaining enantiomerically pure compounds. In study presented herein, enantioselective biotransformations (R,S)-1-phenylethanol were performed with use various catalytic systems containing ionic liquids and n-heptane or toluene as a reaction medium, vinyl acetate isopropenyl an acetylating agent, lipases from Burkholderia cepacia Candida rug...