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Improved thermostability and interfacial matching of nanoclay filler and ethylene vinyl alcohol matrix by silane-modification

  • The interfacial compatibility between polymers and nanoclay fillers as well as the thermostability of both components are important characteristics for processing them into polymer composites. While the polymer component is often grafted using common polymerization reactions, the nanoclay component is usually surface modified by surfactant treatment to improve compatibility. In the present study, the polymer ethylene vinyl alcohol and a nanoclay filler based on natural bentonite are both surface modified by different silanes, 3-glycidoxypropyltrimethoxysilane and methacryloxymethyltrimethoxysilane and their interfacial properties are investigated by inverse gas chromatography. The silane-modified samples had improved interfacial properties as reflected by a significant increase in dispersive and specific surface energies. Lewis acidities were determined using chloroform and 1,4-dioxane as polar probes and showed a good match between polymer and nanofiller interfaces. Lewis acidity was generally lower after silane-modification. Silanization yielded increased thermal stability of the treated samples. Thus, silanization led to improved compatibility and enhanced thermal stability which facilitates further processing.

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Author of HS ReutlingenGeyer, Björn; Röhner, Stefan; Lorenz, Günter; Kandelbauer, Andreas
Erschienen in:Journal of applied polymer science
Place of publication:New York
Document Type:Journal article
Publication year:2015
Tag:clay; compatibilization; polyolefins; surfaces and interfaces
Page Number:11
First Page:1
Last Page:11
DDC classes:540 Chemie
Open access?:Nein
Licence (German):License Logo  In Copyright - Urheberrechtlich geschützt