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Preparation and characterization of acrylic polymer titania hybrid. A study of organicinorganic interactions in hybrid materials by micro-hardness Vickers

Published online by Cambridge University Press:  01 February 2011

Van Nhan Nguyen ,
François Xavier Perrin  and
Jean-Louis Vernet
Van Nhan Nguyen
Affiliation:
Laboratoire de Chimie Appliquée-ISITV, Université de Toulon et du Var, BP 132, 83957 La Garde Cedex - FRANCE
François Xavier Perrin
Affiliation:
Laboratoire de Chimie Appliquée-ISITV, Université de Toulon et du Var, BP 132, 83957 La Garde Cedex - FRANCE
Jean-Louis Vernet
Affiliation:
Laboratoire de Chimie Appliquée-ISITV, Université de Toulon et du Var, BP 132, 83957 La Garde Cedex - FRANCE
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Abstract

Metal-oxide ceramer films have been developed using an acrylic polymer bearing a low amount of methacrylic acid units (ca. 4%mol) as the organic phase with titanium tetrabutoxide as the inorganic sol-gel precursor. The characterisation of free films was realized by various experimental methods. The formation of COOTi bonds prevents large scale phase separation between the organic component and the mineral network. Mechanical properties of the hybrid films have been investigated through dynamic mechanical analysis. The influence of the titania content on the damping peak amplitude suggests that titania is molecularly dispersed in the polymer matrix and that it significantly hinders the segmental motion of the polymer chains. However, the low content in potential carboxylic crosslinking sites explains why the glass transition temperature remains relatively unchanged when titania content increases. Vickers microhardness measurements used in this study allowed us to understand the contribution of the inorganic part (phase TiO2) to the mechanical properties of the polymer. The creep of hybrids has been studied carrying out hardness measurements under various indentation times. The mineral constituent leads to an important increase of the hardness and limits, in a significant way, the creep of polymer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 726: Symposium Q – Hybrid Organic-Inorganic Materials , 2002 , Q6.23
Copyright
Copyright © Materials Research Society 2002

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