Polyethylene-Na+ montmorillonite nanocomposites prepared by in situ polymerization
article
Titanium complexes that are active in olefin polymerization are intercalated into interlayer galleries of a natural layered aluminosilicate, Na+ montmorillonite, modified by dimethyldioctadecylammonium ions. The in situ polymerization of ethylene with intercalated complexes yields PE-modified montmorillonite nanocomposites containing 4.0-44.0 wt % aluminosilicate. According to X-ray diffraction study, when the filler content is no greater than 24.0 wt %, the as-prepared nanocomposites represent exfoliated nanocomposite systems. It is shown that the best combination of properties is achieved when the filler content in nanocomposites is in the range of 4.0-7.7 wt %. Compared to an unfilled PE prepared under the same conditions, the resulting nanocomposites are characterized by a higher elastic modulus, while their tensile strength and elongation at break remain at the same level. Chemicals / CAS: montmorillonite, 1318-93-0, 61029-13-8; polyethylene, 9002-88-4; silicate, 12627-13-3
Topics
TNO Identifier
238065
ISSN
0965545X
Source
Polymer Science - Series A, 46(11), pp. 1199-1205.
Pages
1199-1205
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