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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.


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Journal ArticleDOI
25 Aug 2011-Langmuir
TL;DR: The composition profile showed a strong effect on the degree of acid dissociation at a given pH, and the conformational transition of the copolymer chains was determined by both the pH value and composition profile.
Abstract: A series of gradient copolymers of methacrylic acid (MAA)/methyl methacrylate (MMA) with four end-to-end composition profiles (uniform, linear gradient, triblock with linear gradient midblock, and diblock) but all having an average chain composition of FMMA ≈ 0.5 and an average chain length of 200 were synthesized via model-based, computer-programmed, semibatch atom-transfer radical copolymerization (ATRcoP). These samples allowed us to investigate systematically the effects of the gradient composition profile on the pH responsivity and micelle formation of the copolymers in an aqueous solution. Measurements included light transmittance, TEM, AFM, DLS, 1H NMR, and pH titration. It was found that linear gradient, triblock, and diblock copolymers formed spherical micelles at high pH. The micelles of the linear gradient copolymer contained MMA units in their hydrophilic shells, and those of the triblock and diblock copolymers had all of their MMA units residing in their cores. The composition profile showed...

54 citations

Journal ArticleDOI
TL;DR: In this article, molecular imprinted polymers (MIPs) using combination of acrylamide (ACM) and 4-vinylpyridine (4-Vpy) as co-functional monomers exhibited efficient recognition properties in both organic and aqueous media.

54 citations

Journal ArticleDOI
TL;DR: The optimized imprinted hydrogel (MIP1:4), prepared with 400 mM MAA and DZD: MAA molar ratio of 1:4, had the highest affinity for DzD and the greatest ability to control the release process in aqueous media.
Abstract: In the present work a series of imprinted (MIPs) and non-imprinted (NIPs) hydrogels were prepared using 2-hydroxyethyl methacrylate (HEMA) as a backbone monomer, ethylene glycol dimethacrylate (EGDMA) as a cross-linker monomer, methacrylic acid (MAA) as a functional monomer and dorzolamide (DZD) as the template molecule. Different concentrations of MAA (0, 100, 200, 400 mM) were used for preparation of NIPs. Two DZD: MAA molar ratios (1:8 and 1:4) and 400 mM MAA were also applied in imprinting process. The hydrogels (0.4 mm thickness) were synthesized by thermal polymerization at 50°C in 24h in a polypropylene mould. Then, the swelling and binding properties of hydrogels were evaluated in water. Their loading and releasing properties were also studied in NaCl 0.9% and artificial lachrymal fluid. The results showed that using MAA as co-monomer and applying molecular imprinting technique increased loading capacity of hydrogels. The optimized imprinted hydrogel (MIP1:4), prepared with 400 mM MAA and DZD: MAA molar ratio of 1:4, had the highest affinity for DZD and the greatest ability to control the release process in aqueous media. Our data indicated that the use of suitable co-monomer and applying a molecular imprinting technique had important influence on loading and releasing properties of hydrogels.

54 citations

Journal ArticleDOI
TL;DR: The data suggest that multiequilibria proton exchange, a wide distribution in surface group pK values, and/or a macromolecular structural dependence on pH may play a significant role in magnetization transfer in polymer systems.

54 citations

Journal ArticleDOI
TL;DR: It was observed that the polymer synthesized at the MAA/TEOS molar ratio of 6:1 was much more selective for cholesterol than the one prepared at the ratio of 1:5, thus suggesting that selective binding sites ascribed to the carboxyl group from MAA play a central role in the imprinting effect created on MIP.

54 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023135
2022211
2021141
2020225
2019285
2018308