Loading…

effect of anionic clay particles on the structure and thermomechanical behavior of sodium partially-neutralized EMAA ionomer

Nanocomposites based on a sodium partially-neutralized ionomer of poly(ethylene-co-methacrylic acid) (EMAA) and MgAl layered double hydroxide (LDH) particles with and without organic modification were prepared from a melt mixing process. The structure was characterized using X-ray diffraction analys...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied polymer science 2010-06, Vol.116 (5), p.2573-2579
Main Authors: Ardanuy, M, Velasco, J.I, Rodriguez-Perez, M.A, de Saja, J.A
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Nanocomposites based on a sodium partially-neutralized ionomer of poly(ethylene-co-methacrylic acid) (EMAA) and MgAl layered double hydroxide (LDH) particles with and without organic modification were prepared from a melt mixing process. The structure was characterized using X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). Although TEM micrographies revealed the presence of agglomerates of LDH sheets, the achievement of an exfoliated structure was observed when dodecyl sulphate-modified LDH particles were used. The effects of the LDH particles on the thermomechanical properties of EMAA were analyzed using differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). The thermal transition of the ionic aggregates and dynamic mechanical response of EMAA were found strongly modified by these particles, resulting in an increase on the storage modulus and a decrease on the loss factor values. Moreover, the alpha relaxation of the composites was visibly shifted to higher temperatures.
ISSN:0021-8995
1097-4628
1097-4628
DOI:10.1002/app.31818