Results 111 to 120 of about 1,032 (170)
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Thermal degradation of polymethacrylic acid
Journal of Polymer Science Part A, 1992AbstractThe thermal degradation of polymethacrylic acid was found to have two separate decomposition regions. The first decomposition region, due to anhydride formation primarily, was caused by the conversion of polymethacrylic acid to polymethacrylic anhydride.
Yu-Der Lee
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Adsorption of polyethyleneimine and polymethacrylic acid onto synthesized hematite
Journal of Colloid and Interface Science, 2009An influence of different functional groups of polymer, its molecular weight, polydispersity ratio (M(w)/M(n)) and presence of impurities on its adsorption in different pH values (3, 6 and 9) onto synthesized hematite (Fe(2)O(3)) was measured. A structure of adsorbed macromolecules of PMA and PEI was obtained according to S-F theory.
S Chibowski, Elżbieta Grza̧Dka
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Polymethacrylic acid as a new precursor of CuO nanoparticles
Journal of Molecular Structure, 2012Abstract Polymethacrylic acid and its copper complexes have been synthesized and characterized. These complexes have been used as precursors to produce CuO nanoparticles by thermal decomposition in air. The stages of decompositions and the calcination temperature of the precursors have been determined from thermal analyses (TGA).
Nasser Mohammed Hosny, M Sh Zoromba
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Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2001 C Sbriziolo
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Materials Today: Proceedings, 2021
Abstract Polymethacrylic acid (PMAA) and modified Polymethacrylic acid functionalized with catechol (PMAA/CAT), hydroquinone (PMAA/HQ) and catechol-hydroquinone (PMAA/CAT-HQ) were synthesized by oxidative decarboxylation method using ammonium persulphate as an oxidant and characterized using UV–Visible spectroscopy, FT-IR, XRD, TGA and SEM studies ...
J. Devakumar +3 more
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Abstract Polymethacrylic acid (PMAA) and modified Polymethacrylic acid functionalized with catechol (PMAA/CAT), hydroquinone (PMAA/HQ) and catechol-hydroquinone (PMAA/CAT-HQ) were synthesized by oxidative decarboxylation method using ammonium persulphate as an oxidant and characterized using UV–Visible spectroscopy, FT-IR, XRD, TGA and SEM studies ...
J. Devakumar +3 more
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ECS Journal of Solid State Science and Technology, 2021
Polymethacrylic acid (PMAA) and substituted polymethacrylic acid (PMAA/HQ) with para dihydroxy benzene (HQ) were synthesized via free radical polymerization and they were characterized using UV–vis, FT- IR, XRD spectral studies. The UV–vis spectrum of both PMAA and PMAA/HQ shows transitions due to π
J. Devakumar +5 more
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Polymethacrylic acid (PMAA) and substituted polymethacrylic acid (PMAA/HQ) with para dihydroxy benzene (HQ) were synthesized via free radical polymerization and they were characterized using UV–vis, FT- IR, XRD spectral studies. The UV–vis spectrum of both PMAA and PMAA/HQ shows transitions due to π
J. Devakumar +5 more
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The sedimentation and diffusion of sodium polymethacrylate and polymethacrylic acid
Journal of Polymer Science, 1954AbstractThe sedimentation constants and diffusion coefficients of sodium polymethacrylate and of polymethacrylic acid have been determined at various concentrations of polymer and of added electrolyte and the nature of the charge effects is considered. A ratio y = (molarity of added electrolyte)/(grundmolarity of polymer) is used to obtain S20 at y = ∞
G. J. Howard, D. O. Jordan
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Potentiometric behavior of polymethacrylic acid
Journal of Polymer Science Part A: General Papers, 1964AbstractThe potentiometric behavior of polymethacrylic acid is discussed in terms of a conformational transition. A thermodynamic treatment of this transition is presented. The titration curve of polymethacrylic acid is analyzed in a detailed way and quantitative information regarding the transition is obtained.
J. C. Leyte, M. Mandel
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Precipitation of trypsin with polymethacrylic acid
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1970It has been shown that the precipitation of trypsin with polymethacrylic acid results in a reversible or irreversible (after an incubation period) formation of a complex and, in the latter case, a stable, nonactive addition product can be isolated.
S. V. Kol'tsova +2 more
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