Preparation and characterization of light-cured methacrylate/montmorillonite nanocomposites

Polymer/clay nanocomposites were prepared from dimethacrylate monomers, commonly used in dental restorative resins, and an organically modified silicate (montmorillonite). The photopolymerization process was hardly affected by the presence of the silicate filler, and thus 2 mm thick samples containi...

Full description

Saved in:
Bibliographic Details
Published in:Polymer international 2011-02, Vol.60 (2), p.247-254
Main Authors: Mucci, Verónica, Pérez, Javier, Vallo, Claudia I
Format: Article
Language:English
Subjects:
Applied sciences
Biological and medical sciences
Clay (material)
Composites
Compressive strength
dental resins
Dispersions
Exact sciences and technology
Fillers
Forms of application and semi-finished materials
Head and neck surgery. Maxillofacial surgery. Dental surgery. Orthodontics
Maxillofacial surgery. Dental surgery. Orthodontics
Medical sciences
methacrylates
Monomers
Montmorillonite
Nanocomposites
photopolymerization
Polymer industry, paints, wood
Silicates
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Technology of polymers
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:Polymer/clay nanocomposites were prepared from dimethacrylate monomers, commonly used in dental restorative resins, and an organically modified silicate (montmorillonite). The photopolymerization process was hardly affected by the presence of the silicate filler, and thus 2 mm thick samples containing 3 wt% clay were extensively cured. Transmission electron microscopy revealed that the montmorillonite platelets were either intercalated or exfoliated. Nevertheless, for all formulations, intermediate‐sized aggregates of about 1 µm were present and their fraction increased as the amount of filler increased. The presence of the clay was found to have no major effect on the flexural modulus and compressive yield strength of the nanocomposites. Moreover, the water uptake of nanocomposites containing 3 wt% clay was about 10–15% higher than that of unfilled monomers. Modification of the clay surface with alternative organic cations is certainly necessary in order to achieve an optimal dispersion of the clay in the polymer matrix. Copyright © 2010 Society of Chemical Industry Clay‐based nanocomposites were prepared from methacrylate monomers and montmorillonite. The photopolymerized nanocomposites consisted of intercalated (B) and exfoliated (C) structures accompanied by small agglomerates (A).
ISSN:0959-8103
1097-0126
1097-0126
DOI:10.1002/pi.2935