Topic
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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TL;DR: In this article, the effects of pH, temperature and time in the alkali treatment process as the first step on the multihollow structure were clarified under the same acid treatment conditions.
Abstract: Submicron-sized multihollow styrene-methacrylic acid (92.6/7.4, molar ratio) copolymer particles having high transition temperature above 100°C were produced by using the stepwise alkali/acid method proposed by the authors. The original particles were prepared by emulsion copolymerization of styrene and methacrylic acid. The effects of pH, temperature and time in the alkali treatment process as the first step on the multihollow structure were clarified under the same acid treatment conditions.
45 citations
Patent•
11 Oct 1974TL;DR: In this paper, the authors proposed a dental filling composition comprising from 60 to 80% by weight of the composition of an inorganic particulate filler selected from glass, quartz or silica of which at least 50% of the particles have a maximum dimension of not greater than 300 microns.
Abstract: A dental filling composition comprising (a) from 60 to 80% by weight of the composition of an inorganic particulate filler selected from glass, quartz or silica of which at least 50% of the particles have a maximum dimension of not greater than 300 microns, and (b) a polymerizable material comprising: A polymerizable prepolymer being the reaction product of a urethane prepolymer and 2-hydroxy-ethyl methacrylate; The said urethane prepolymer being the reaction product of a di-isocyanate selected from the group consisting of 4,4'-di-isocyanatodiphenylmethane, hexamethylene di-isocyanate, 4,4'-dicyclohexylmethane di-isocyanate and 2,4-tolylene di-isocyanate, and a diol being the condensate obtained by reacting 2,2-bis-(p-hydroxyphenyl)propane and propylene oxide in a molar ratio of 1:2; Up to 100% by weight of the polymerizable prepolymer of methacrylic acid or an ester of methacrylic acid selected from the group consisting of methyl methacrylate, ethylene glycol dimethacrylate, hydroxyethyl methacrylate, triethylene glycol dimethacrylate and allyl methacrylate; And from 0.01 to 10% by weight of the polymerizable material of a photosensitive catalyst comprising a photosensitizer selected from the group consisting of fluorenone, benzil, camphorquinone and α-naphthil, and a reducing agent being dimethylaminoethyl methacrylate.
45 citations
TL;DR: In this article, a composite membrane was fabricated by physical blending of sulfonated poly(ether ether ketone) (SPEEK) bulk material and crosslinked polymer carboxylic acid spheres (PCASs) with diameter of 150nm, which were prepared by distillation-precipitation copolymerization of ethyleneglycol dimethacrylate (EGDMA) crosslinker and functional methacrylic acid (MAA) monomer.
45 citations
TL;DR: In this article, a series of 12-heteropoly oxometalate catalysts were studied to investigate the contribution of the cation in the IBA to methacrylic acid (MAA) reaction.
45 citations
TL;DR: On the basis of hydrogen bonding, poly(vinylpyrrolidone) and poly(methacrylic acid) were layer-by-layer deposited on the surface of the AgCl microcrystals or SiO2 colloidal particles in aqueous solution to construct core−shell structure particles as discussed by the authors.
Abstract: On the basis of hydrogen bonding, poly(vinylpyrrolidone) and poly(methacrylic acid) were layer-by-layer deposited on the surface of the AgCl microcrystals or SiO2 colloidal particles in aqueous solution to construct core−shell structure particles. When the AgCl and SiO2 cores were removed, the porous and nonporous nanocapsules were obtained, respectively. After the nonporous capsules were incubated in a KSCN and HNO3 mixture solution for 24 h, the capsules shrank and the pores were formed in the shell of the capsules.
45 citations