This study aimed to improve the surface properties of lignocellulosic cellulose fiber using oxidative grafting method. Various acrylic monomers were used, including methyl methacrylate, acrylate, ethyl and varying monomer concentrations. In addition, effect ceric ammonium nitrate (CAN) as an initiator on efficiency modification was investigated. The experimental results showed that kind concent...

An optimisation of Michael-type addition of azole derivatives of broad-scale acidity - ranging from 5.20 to 15.00 pK(a) units - namely 4-nitropyrazole, 3,5-dimethyl-4-nitropyrazole, 4(5)-nitroimidazole, 4,5-diphenylimidazole, 4,5-dicyanoimidazole, 2-methyl-4(5)-nitroimidazole, 5(4)-bromo-2-methyl-4(5)-nitroimidazole and 3-nitro-1,2,4-triazole to methyl acrylate as an acceptor was carried out. T...

BACKGROUND Acrylates constitute an important cause of occupational contact dermatitis. Isobornyl acrylate sensitization has been reported in only 2 cases. We encountered an industrial process operator with occupational contact dermatitis caused by isobornyl acrylate. OBJECTIVES (i) To investigate whether it is relevant to add isobornyl acrylate to the (meth)acrylate test series. (ii) To repor...

We present a detailed characterization of fibronectin (FN) adsorption and cell adhesion on poly(ethyl acrylate) (PEA) and poly(methyl acrylate) (PMA), two polymers with very similar physicochemical properties and chemical structure, which differ in one single methyl group in the lateral chain of the polymer. The globular solution conformation of FN was retained following adsorption onto PMA, wh...

Polymerization of ethylene by complexes [{(P^O)PdMe(L)}] (P^O = κ(2)-(P,O)-2-(2-MeOC(6)H(4))(2)PC(6)H(4)SO(3))) affords homopolyethylene free of any methyl methacrylate (MMA)-derived units, even in the presence of substantial concentrations of MMA. In stoichiometric studies, reactive {(P^O)Pd(Me)L} fragments generated by halide abstraction from [({(P^O)Pd(Me)Cl}μ-Na)(2)] insert MMA in a 1,2- as...

We present a straightforward low cost liquid phase deposition method to coat arbitrary-shaped dielectric substrates with uniform electron beam sensitive polymer films. Furthermore, we investigate the use of electron beam lithography to pattern the coated pre-form substrates. The polymers studied are poly-methyl-methacrylate with different molecular weights, poly(methyl methacrylate-co-ethyl acr...

J . R a d h a k r i s h n a n Department of Chemistry, University of Connecticut, Storrs, Connecticut 06268, USA Z. Naturforsch. 84b, 481-487 (1979); received August 15, 1978 Solvolysis, Methylnorbornyl Systems, Norbornan-3,6-dione, 2-exo-Methylnorbornan-6-one 3-Nortricyclyl bromide (11) was transformed in four steps to norbornan-3,6-dione (10). Methyl 4 -hydroxy-2-butynoate (19) was prepared f...