Mechanical and Thermal Stability of Epoxy – TEOS Hybrids Materi-als using Sol-Gel Method
DOI:
https://doi.org/10.23851/mjs.v29i3.637Keywords:
TEOS, Epoxy, water absorption, three point bending, hardness test, DTA analysisAbstract
Sol-gel method is the simplest method and has to preparation of nano particles, nano fibers, and nano flaks. The preparation of hybrid epoxy thermosets enables their improvement in characteristics such as mechanical properties (bending,and hardness), thermal properties. The effect of water absorption on bending and hardness test for tetraethylorthosilicate (TEOS) and epoxy hybrid have been investigated. TEOS with (0%,2%,4%,6%and 8%) volume per-centage mixed with epoxy to prepared sheets of hybrid, these sheets cut as samples for ASTM water absorption, bending and hardness tests. The results show that, adding TEOS to epoxy will increase absorbance of water. bending test shows that there are increase in values of bending stress with increasing TEOS but after im-mersion in water all the values for bending stress will reduce. Hardnessvalues at least for the samples immersion in water from dry samples, occur the diffusion of molecules water in the polymer and hybrids leads to space molecular chains for each other and decrease the hard-ness values. Thermal stability of hybrids increase with increasing TEDownloads
References
Angels Serra, Xavier Ramis and Xavier Fernández-Francos "Epoxy Sol-Gel Hybrid Thermosets" Coatings, 6, 8, 2016, P1-19.
Cheng-Fu Yang Li-Fen Wang, Song-Mao Wu, and Chean-Cheng Su "Characterization and Curing Kinetics of Epoxy/Silica Nano-Hybrids ", Materials 2015, 8, 7032–7040
U.Huner" effect of water absorption on the mechanical properties of flax fibers reinforced epoxy composites ", Advances in science and technology, vol.9, no. 26, 2015,P1-6.
S. wang,R. Masoodi and B. George " tensile strength and water absorption behavior of recycled jute-epoxy composites",jou. Renew. mater., vol.4, 2013, P 279.
Cristina Acebo, Xavier Fernández-Francos,1 José-Ignacio Santos, Massimo Messori, Xavier Ramis, Àngels Serra1 "Hybrid Epoxy Networks from Ethoxysilyl- modified Hyperbranched Poly(ethyleneimine) and Inorganic Reactive Precursors ". Universiteit Gent, Belgium, Tarragona, May 7th 2015.
Mahmoud y. zorainy, ahmed nashaat, yasser el-shaer, mohamedgobara and ahmedelbeih"preparation and characterization of modified silica-epoxy hybrid ceramic coatings", MATEC Web of Conferences 136, 01010 2017.
C. Yang, L. Wang, S. Wu and C.Su “characterization and curing kinetics of epoxy –silica nano hybrids ", jou. Materials, vol.8, 2015, P7032-7040.
[8] Z.Wen, L.Xiao, W.Hong,H.Lao and W.Chen "microstructure and oxidation behavior of sol-gel mullite coating on sic-coated carbon-carbon composites ", jou. Eur. Ceramic, vol. 35, 2015, P 3789-3798.
M. Cakir, I. Kartal, H. Demiver and R. Samur " Effect of water absorption on the water absorption on the wear behavior of sol-gel processed epoxy –silica hybrids", scientific research and Essays, vol.7(7), 2012, P 805-812.
H.Faik, A.Hind,andS.Hasan " effect of water absorption on hardness property for epoxy reinforced by glass fiber", jou. of university of anbar for pure science, vol.5, no. 3, 2011.
P. Neogi “diffusion in polymers ", printed in the united states of America, 1996.
J.R. Witonoa, I.W. Noordergraaf b,, H.J. Heeres b, L.P.B.M. Janssenb" Water absorption, retention and the swelling characteristics of cassava starch grafted with polyacrylic acid", Carbohydrate Polymers 103, 2014, P 325-332.
J.Comyn" polymer permeability ", Elsever applied science publishers LTD, London, 1985.
Downloads
Key Dates
Published
Issue
Section
License
Articles accepted for publication in Al-Mustansiriyah Journal of Science (MJS) are protected under the Creative Commons Attribution 4.0 International License (CC BY-NC). Authors of accepted articles are requested to sign a copyright release form prior to their article being published. All authors must agree to the submission, sign copyright release forms, and agree to be included in any correspondence between MJS and the authors before submitting a work to MJS. For personal or educational use, permission is given without charge to print or create digital copies of all or portions of a MJS article. However, copies must not be produced or distributed for monetary gain. It is necessary to respect the copyright of any parts of this work that are not owned by MJS.
How to Cite
