Organic Modification Of Montmorillonite With Low Molecular Weight Polyethylene Glycols And İts Use İn Polyurethane Nanocomposite Foams
MetadataTüm öğe kaydını göster
This paper deals with the preparation of organoclays by intercalating poly(ethylene glycol) molecules (PEG) between Na montmorillonite (Na-MMT) layers in a clay-water suspension system. X-ray diffraction (XRD) results of organoclays revealed that galleries of MMT were expanded after their intercalation with three different low molecular weight PEGs, including PEG600, PEG1000 and PEG1500. Thus, the distance of the interlayer spacing of MMT, d = 1.38 nm, was increased to d = 1.72, 1.75 and 1.69 nm, respectively, in the organoclay samples. The results of Fourier transform infrared spectroscopic (FTIR), thermogravimetric (IG) and scanning electron microscopic (SEM) analyses supported the findings of XRD and implied that the clay mineral mainly lost its hydrophilic character and gained organophilic features. The organoclay samples also presented improved thermal stabilities. In addition, polyurethane rigid nanocomposite foams composed of 2% organoclays were synthesized, and the effects of the organoclays on the thermal and mechanical performance of the nanocomposite foams were investigated. (C) 2010 Elsevier B.V. All rights reserved.
Başlık, yazar, küratör ve konuya göre gösterilen ilgili öğeler.
The Manufacturing Of Polyamide- And Polypropylene-Organoclay Nanocomposite Filaments And Their Suitability For Textile Applications Sarıer, Nihal; Önder, Emel; Ersoy, M. Sabri (Elsevier Science Bv, Po Box 211, 1000 Ae Amsterdam, Netherlands, 2012-09-10)In this study, we prepared polymer-clay monofilaments using a melt spinning technique in which organoclays were incorporated into polyamide 6 (PA6) and polypropylene (PP) homopolymer resins. The structural and thermal ...
Study of the morphological and thermal properties of polystyrene nanocomposites based on modified halloysite nanotubes with styrene-maleic anhydride copolymers Arat, Refik; Uyanık, Nurseli (Elsevier Science Bv, Po Box 211, 1000 AE Amsterdam, Netherlands, 2017-12)In this study, the melt blending method was used to prepare the polystyrene/halloysite nanotubes (PS/HNTs) nanocomposites instead of in-situ bulk polymerization of styrene monomer in the presence of HNTs. Surface modification ...
Sarıer, Nihal; Önder, Emel; Ersoy, Sabri (Elsevier Science Bv, Po Box 211, 1000 Ae Amsterdam, Netherlands, 2010-11-20)The organic modification of Na-montmorillonite (Na-MMT) clay by a reaction with the sodium salts of octadecanoic acid (SOD) and dodecanoic acid (SDD) was studied for the production of effectively intercalated and organophilic ...