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, a 1:1 alternating copolymer comprising styrene (St) and N-phenylmaleimide (NMI) was used to create 2D lamellae.
Abstract: RAFT dispersion polymerization is used to prepare diblock copolymer nano-objects using a poly(methacrylic acid) macromolecular chain transfer agent (PMAA macro-CTA) as the steric stabilizer and AIBN initiator at 70 °C. The core-forming block is a 1:1 alternating copolymer comprising styrene (St) and N-phenylmaleimide (NMI), and the continuous phase is an ethanol/1,4-dioxane mixture. The 1,4-dioxane cosolvent is essential for this formulation because it aids solubilization of the NMI comonomer within the growing diblock copolymer micelles. Even so, kinetic studies reveal a significant retardation effect once micellar nucleation has occurred. More importantly, the relatively high glass transition temperature of the P(St-alt-NMI) core-forming block (Tg = 219 °C) has an interesting influence on the evolution of the copolymer morphology with conversion. At the polymerization temperature of 70 °C, this alternating copolymer is so stiff that 2D lamellae are formed, rather than the vesicular phase that is commonl...
80 citations
TL;DR: Jardine et al. as discussed by the authors described a single-stage synthesis of fluorescent hard-sphere polymer colloids by a dispersion copolymerization of methyl methacrylate and methacrylic acid in the presence of a nonpolymerizable dye.
80 citations
TL;DR: In this paper, the authors demonstrate that acrylic acid, glycidyl acrylate (GA) and several other acrylic monomers can be photopolymerized and photografted onto high-density polyethylene (HDPE) by self-initiation.
Abstract: Summary: This work demonstrates that acrylic acid (AA), glycidyl acrylate (GA) and several other acrylic monomers can be photopolymerized and photografted onto high-density polyethylene (HDPE) by self-initiation. The self-initiation mechanism of these acrylic monomers is possibly by an excitation of the monomer to a triplet state (T3) with enough energy to abstract hydrogen from the polymer substrate and initiate the grafting.
Grafting conversion of acrylic acid (AA), methacrylic acid (MAA), 2-hydroxyethyl acrylate (HEA), glycidyl acrylate (GA), 2-hydroxyethyl methacrylate (HEMA) and poly(ethylene glycol) methacrylate (PEGMA) as a function of irradiation time.
80 citations
TL;DR: In this article, the swelling behavior of poly(methoxyethyl methacrylate) brush was investigated as a function of pH 9 and salt concentration in aqueous solutions using atomic force microscopy.
80 citations
01 Oct 1969
TL;DR: In this article, insertion poly(methyl methacrylate) homopolymers and copolymers with methacrylic acid were prepared from the corresponding monomers adsorbed as monolayers on the surface of sodium montmorillonite.
Abstract: Insertion poly(methyl methacrylate) homopolymers and copolymers with methacrylic acid were prepared from the corresponding monomers adsorbed as monolayers on the surface of sodium montmorillonite. The polymerization was carried out with γ-rays or benzoyl peroxide with or without crosslinking agent. Both insertion homopolymers and copolymers are associated in “packets” containing several macromolecules. The architecture of these aggregates is reminiscent of the elementary crystallite of montmorillonite. The aggregates can be dissociated irreversibly into individual macromolecules which display unusual light scattering and viscosity behavior. Only insertion homopolymers or copolymers prepared with benzoyl peroxide and without crosslinking agent follow the usual viscosity molecular weight relationship for linear (poly(methyl methacrylate). Insertion polymers or copolymers prepared with γ-rays display unusual viscosity and light scattering properties irrespectively of the presence of crosslinking agent. A compact two-dimensionally crosslinked architecture is compatible with the properties observed. This hypothesis is confirmed by the hydrodynamic properties of sodium salts of crosslinked insertion copolymers in methanol and in water. The polyelectrolytes appear to be extensively crosslinked and to display an oblate macromolecular conformation upon expansion.
80 citations