140918-54-3Relevant academic research and scientific papers
Hydrogen-bond induced side-chain liquid crystalline polymers based on nicotinic acid derivatives
Saravanan,Ambili,Kannan
, p. 217 - 222 (2011/10/18)
Supramolecular side-chain liquid crystalline poly(acrylate)s have been prepared by self-assembly of H-bond donor and acceptor complexes through intermolecular complementary hydrogen bond formation. Poly[4-(m-acryloyloxyalkyloxy)benzoic acid]s [m = 6 (P1) and 8 (P2)] were employed as polymer components. Liquid crystalline nicotinic acid derivatives (C1, C2, C3, and C4) were used as complementary H-bond donor/acceptor counterparts. The liquid crystalline properties of the nicotinic acid derivatives, the polymers and their complexes were investigated by DSC and POM. Methylene spacers present at the terminal position of the nicotinic acid derivatives played a key role in mesophase arrangements. The columnar phase exhibited by the nicotinic acid derivatives completely disappeared in the H-bonded complexes to afford a nematic phase, thereby substantiating the complex formation.
PROCESS FOR THE PRODUCTION OF ACRYLIC ACID ESTERS CONTAINING CARBOXYL GROUPS
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Page/Page column 15-16, (2008/06/13)
A process for the production of acrylic esters of general formula (11) by way of reacting a carboxyl group containing hydroxy compound of general formula (a) with acryloyl chloride (c) according to the following general scheme (C): ( II ) wherein A denotes a flexible spacer group, Y a divalent linking group and M a divalent hydrocarbon ring(s) and/or heterocyclic ring(s) containing group containing up to 30 carbon atoms, characterized in that the reaction is carried out a) in the presence of a solvent medium, whereby the solvent medium contains at least 30% per weight based on the total amount of the solvent medium of a solvent selected from the group of N,N-Dimethyl acetamide (DMAc), N-Methyl-pyrrolidon (NMP), N,N,N'N'-Tetramethyl urea (TMU) and N-Methylcaprolactam, b) in the absence of a base, and that c) the reaction temperature is kept between -10'C and +50'C; said process is especially suitable for obtaining products in high yield and purity in an industrial scale.
