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Title: Nanostructure and thermal properties of melt compounded PE/clay nanocomposites filled with an organosilylated montmorillonite

In this work we report on the functionalization of a natural sodium montmorillonite (MMT) with (3-glycidyloxypropyl)trimethoxysilane by a silylation procedure and on its use as nanofiller in melt compounding of polyethylene nanocomposites. The obtained organosilylated clay showed higher interlayer spacing than the original MMT and higher thermal stability with respect to most of commercial organoclays modified with alkylammonium salts. Its addition (at 5wt%) to two different polyethylene matrices (a low density polyethylene, LDPE, and a high density polyethylene, HDPE), processed in a pilot-scale twin-screw extruder, allowed to produce hybrids with nanoscale dispersion of the filler, as demonstrated by X-ray diffraction. Thermogravimetric and differential scanning thermal analyses point out that the obtained nanocomposites do not show noticeable changes in the thermal behavior of both LDPE and HDPE, even if a slight reduction in the overall bulk crystallinity was observed in presence of the nanofillers.
Authors:
 [1] ;  [2] ; ;  [1] ; ; ; ;  [3]
  1. Department of Industrial Engineering, University of Salerno Via Giovanni Paolo II 132 – 84084 Fisciano (Italy)
  2. (Germany)
  3. BAM - Federal Institute for Materials Research and Testing, 7.5 Technical Properties of Polymeric Materials, Unter den Eichen 87 - 12205 Berlin (Germany)
Publication Date:
OSTI Identifier:
22494367
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1695; Journal Issue: 1; Conference: GT70 international conference on polymer processing with resulting morphology and properties: Feet in the present and eyes at the future, Salerno (Italy), 15-17 Oct 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DIFFERENTIAL THERMAL ANALYSIS; MONTMORILLONITE; NANOCOMPOSITES; NANOSTRUCTURES; POLYETHYLENES; SALTS; SILANES; SODIUM COMPOUNDS; THERMAL GRAVIMETRIC ANALYSIS; THERMODYNAMIC PROPERTIES; X-RAY DIFFRACTION