Detail of "45021-77-0"

Reference

One-pot synthesis of PMMA/montmorillonite nanocomposites

All Rights Reserved. One-pot synthesis of PMMA/montmorillonite nanocomposites. Kiersnowski, Adam; Trelinska-Wlazlak, Maria; Dolega, Justyna; Piglowski, Jacek (Polymer Engineering & Technology Division, Wroclaw University of Technology, Wroclaw 50-370, Pol.). e-Polymers, No pp. given (English) 2006 European Polymer Federation. URL: http://www.e-polymers.org/papers/akiersnowski_141106.pdf. CODEN: EPOLCI. DOCUMENT TYPE: Journal; (online computer file) CA Section: 37 (Plastics Manufacture and Processing) This article describes simple prepn. methods of poly(Me methacrylate) (PMMA)/synthetic montmorillonite nanocomposites by single-step in situ polymns.In this article, certain chemicals are used. Some of their cas registry numbers are 9011-14-7 and 45021-77-0 Compatibility between PMMA and the silicate was ensured by an addn. of (3-acrylamidepropyl) trimethylammonium chloride (AAPTMA). The work also compares how different synthetic routes, namely emulsion and soln. polymn., affect the structure and thermal and mech. properties of obtained nanocomposites. The results of structural studies clearly show, that both the techniques lead to intercalated nanocomposites, but emulsion polymn. allows more effective deflocculating and intercalating of the clay with acrylic copolymers. The addn. of small amts. of layered silicates causes an increase in thermal stability and stiffness of the materials. At 5 wt. % of the filler, the temp. of 10 % wt. loss was shifted up by nearly 50 K in comparison to the neat PMMA. In the same sample, the Young's modulus of the material was increased by 26 %. .

Holographic sensors for the determination of ionic strength

Holographic sensors for the determination of ionic strength. Marshall, Alexander J.; Young, Duncan S.; Kabilan, Satyamoorthy; Hussain, Abid; Blyth, Jeff; Lowe, Christopher R. (Institute of Biotechnology, University of Cambridge, Cambridge CB2 1QT, UK). Analytica Chimica Acta, 527(1), 13-20 (English) 2004 Elsevier B.Chemicals with cas numbers 110-26-9 and 45021-77-0 also play role.V. CODEN: ACACAM. ISSN: 0003-2670. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) Holog. sensors for monitoring ionic strength have been fabricated from charged sulfonate and quaternary ammonium monomers, incorporated into thin, polymeric hydrogel films which were transformed into vol. holograms. The diffraction wavelength or reflected color of the holograms was used to characterize their swelling or de-swelling behavior as a function of ionic strength in various media. The effects of co-monomer structure, buffer compn., ion compn., pH and temp. were evaluated, while the reversibility and reproducibility of the sensor was also assessed. An acrylamide-based hologram contg. equal molar amts. of neg. and pos. charged monomers was shown to be able to quantify ionic strength independent of the identity of the ionic species present in the test soln. The sensor was fully reversible, free of hysteresis and exhibited little response to pH between 3 and 9 and temp. within the range 20-45°. The system was successfully used to quantify the ionic strength of milk solns., which contain a complex mixt. of ions and biol. components. .