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The influence of adding of modified ZrO2-TiO2 nanoparticles on certain physical and mechanical properties of heat polymerized acrylic resin

Authors: Tiba A. Salman --- Hanan A. Khalaf
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2015 Volume: 27 Issue: 3 Pages: 33-39
Publisher: Baghdad University جامعة بغداد


requirements of denture base materials. The purpose of this study was to produce new modified polymernanocomposite (PMMA /ZrO2-TiO2) andassess itsimpact strength, transverse strength and thermal conductivity incomparison to the conventionalheat polymerized acrylic resin.Materials and Methods: Both ZrO2 and TiO2nano fillers were silanized with TMSPM (trimethoxysilyl propyl methacrylate)silane coupling agent before beingdispersed by ultrasonication with the methylmethacrylate (monomer) and mixedwith the polymer by means of 2% by weight in (1:1) ratio, 60 specimens were constructed by conventional waterbath processing technique and divided into 2 groups: 30 specimens for control group 0% nanofillers and 30specimens for experimental group 2% of (1:1) ZrO2 and TiO2nano fillers then each group was subdivided into3 subgroupsaccording to the test to be conducted with 10 specimens for impact, transverse and thermal conductivitytest.Results: The interaction of TMSPM silane and the nanofillers was confirmed by FT-IR (Fourier Transform Infra-redspectrophotometer). High significant increase in impact strength (9.838) Kj/m2 and transverse strength (101.705)N/mm2 and non-significant increase in thermal conductivity (0.286) W/m.C° of heat cured acrylic resin of the newpolymer nanocomposite were observed.Conclusions: The addition of 2 wt.% of ZrO2:TiO2 by means of 1:1 ratio considerably improved the impact andtransverse strength and had a positive effect on the thermal conductivity

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