Methacrylic acid

About: Methacrylic acid is a research topic. Over the lifetime, 13058 publications have been published within this topic receiving 173201 citations. The topic is also known as: α-Methacrylic acid & 2-Methylacrylic acid.

Polymeric thickeners and method of preparing same

Abstract: A POLYMERIC SURFACTANT THICKENER COMPRISING A COPOLYMER OF AN ESTER OF AN ALKYLARYLPOLYETHER ALCOHOL, SUCH AS AN ALKYLPHENOXYPOLYETHYLENEOXYETHANOL, WITH AN UNSATURATED CARBOXYLIC ACID COMPOUND, SUCH AS ACRYLIC OR METHACRYLIC ACID, AND AN UNSATURATED ACID COMPOUND, WHICH COPOLYMER COMPRISES FROM ABOUT 70 TO 95% OF THE ESTER AND FROM ABOUT 5 TO 30% OF THE UNSATURATED CARBOXYLIC ACID, AND WHICH COPOLYMER CONTAINS FROM ABOUT 20 TO 100 OXYETHYLENE GROUPS. THE POLYMERIC SURFACTANT THICKENER IS PARTICULARLY USEFUL IN THICKENING POLYMERIC LAXTEX COMPOSITIONS, SUCH AS CARBOXYLATED STYRENE-BUTADIENE LATEX CONTAINING FILLER MATERIAL.

Chitosan-Based Lead Ion-Imprinted Interpenetrating Polymer Network by Simultaneous Polymerization for Selective Extraction of Lead(II)

Abstract: In this study, we report the synthesis of a Pb(II) ion-imprinted interpenetrating polymer network (II-IPN) by simultaneous polymerization for selective extraction of Pb(II) from printed-circuit-board (PCB) recycling unit wastewater. Initially, a polymer network was synthesized by polymerization of methacrylic acid (monomer) and ethylene glycol dimethacrylate (cross-linker) and a second polymer network by chitosan (complexing monomer) and tetraethyl orthosilicate (cross-linker). The chemical structure and morphology of the II-IPN were analyzed using Fourier transform infrared, field-emission scanning electron microscopy, atomic force microscopy, and transmission electron microscopy. The interaction of the functionality in the II-IPN with Pb(II) through chelation was studied by X-ray photoelectron spectroscopy analysis. The maximum adsorption capacities for II-IPN and nonimprinted interpenetrating polymer network were 37.5 and 10.3 mg g–1, respectively. The largest selectivity coefficient for Pb(II) in the ...

Self-Assembly of Alkali-Soluble [60]Fullerene Containing Poly(methacrylic acid) in Aqueous Solution

Abstract: Well-defined stimuli-responsive alkali-soluble poly(methacrylic acid)-block-[60]fullerene (PMAA-b-C60) was synthesized via atom transfer radical polymerization (ATRP), and its aggregation behavior in aqueous solution was examined using potentiometric and conductometric titrations, static and dynamic light scattering, and transmission electron microscopic (TEM) techniques. PMAA-b-C60 shows pH-responsive and water-soluble properties at high pH. In dilute solution, the micelles and large secondary aggregates, which are independent of polymer concentration, coexist in solution. The Rh of micelles increases from 6 to 10 nm with increasing degree of neutralization and remains constant at 10 nm with the addition of salt. However, the Rh of large aggregates increases from 91 to 153 nm with increasing degree of neutralization and decreases from 153 to 105 nm with increasing NaCl concentration. TEM studies revealed that the large aggregates comprise of individual micelles and possess microstructure similar to large...