Study of some physical properties of epoxy reinforce with Nano particles
Other Title(s)
دراسة بعض الخواص الفيزيائية للا يبوكسي المدعم بدقائق نانوية
Dissertant
Thesis advisor
University
University of Baghdad
Faculty
College of Education for Puresciences-IBN al-Haitham
Department
Department of Physics
University Country
Iraq
Degree
Ph.D.
Degree Date
2016
English Abstract
Epoxy with various mix ratio of concentration 1, 2, 3, 4, 5, 7, 10, 15 and 20% of ZrO2, MgO nanoparticles and ZrO2, MgO microparticles were used to prepare epoxy microcomposites and epoxy nanocomposites in order to study the several mechanical properties (flexural strength, flexural modulus , fracture toughness, impact strength and hardness) and electrical properties (dielectrical constant , dissipation factor and thermal conductivity) and thermal properties (thermal conductivity and Tg The molding process was used to prepare epoxy and their nanocomposite and microcomposite samples using, ultrasonic homogenizer and shearing mixer.
Three point bending examine, impact strength examine, hardness shore D examine, The LCR meter examine, Scanning Electron Microscope (SEM) examine and Differential Scanning Calorimeter (DSC) were used also.
).
The results where obtained to form 3- point bending examine illustrated that the mechanical properties of EP/ ZrO2 nanocomposites were increased with increasing concentration of ZrO2 nanoparticles.
The ratio of about 2% vol.
fraction lead to Maximum improvement in flexural strength was 52%.
flexural modulus improvement was doubled at this ratio of vol.
fraction, fracture toughness is improved about 86% at 2% vol.
fraction, impact strength is improved about 51% at 2% vol.
fraction , while hardness is improved about 5% at 2% vol.
fraction comparing with results of epoxy sample.
Ductile behavior appears in some stress-strain curves of obtained for EP/ ZrO2 The mechanical properties of EP/ MgO nanocomposites were increased with increasing concentration of MgO nanocomposites.
nanoparticles at low volume fractions (˂ 5%) of MgO nanoparticles.
Flexural strength improved 47% at 4% vol.
fraction.
Flexural modulus is improvement about 74% at 4% vol.
fraction, fracture toughness is rise about four times at 4% vol.
fraction.
impact strength is improved about 65% at 4% vol.
fraction, while hardness is improved about 3% at 4% vol.
fraction .
Ductile behavior almost appears in stress-strain curves of EP/ MgO nanocomposites.
The mechanical properties for epoxy ZrO2/ MgO microcomposites reduce with increasing concentration of ZrO2 Scanning Electron Microscope (SEM) pictures show the topography of fractured structure of EP/ ZrO / MgO microparticles.
this show nanoparticles overcome for others microparticles; thus addition quit small amounts .lead to particularly improvement in mechanical properties ,which can be explain through the pictures .
2 nanocomposites and EP/ MgO nanocomposites with nanocracks of the epoxy structure at some of volume fractions of ZrO2/ MgO nanoparticles, while the topography of fractured structure show the nanocracks almost vanish from the structure because of adding ZrO2/ MgO nanoparticles was at minimum value at 2% vol.
fraction of ZrO2 Dielectrical properties of EP/ ZrO nanoparticles and 4% vol.
fraction of MgO nanoparticles .
this enhance by experimental results which we got it in the small raito addition .their influence to improve mechanical properties of epoxy.
2 nanocomposites and EP/ MgO nanocomposites show; Dielectric constant improved at low volume fraction of ZrO2/ MgO nanoparticles, while at higher concentration (> 10%) Dielectric constant of EP/ MgO nanocomposites stile increased and Dielectric constant begin to reduce in EP/ ZrO2 nanocomposites.
Tan delta of EP/ ZrO2 nanocomposites little increase with increasing volume fraction ZrO2 Thermal conductivity for EP/ ZrO nanoparticles, while Tan delta of EP/ MgO nanocomposites begin to reduce with increasing volume fraction of MgO nanoparticles.
2 nanocomposites and EP/ MgO nanocomposites have the same behavior with 1, 2, 3, 4, 5, 7, 10, and 15% vol.
fraction.
thermal conductivity of both EP/ ZrO2 nanocomposites and EP/ MgO nanocomposites increase with increasing the volume fraction.
EP/ MgO nanocomposites and EP/ MgO nanocomposites have thermal conductivity lower than from EP/ MgO microcomposites and EP/ MgO microcomposites
Main Subjects
No. of Pages
122
Table of Contents
Table of contents.
Abstract.
Abstract in Arabic.
Chapter One : Introduction.
Chapter Two : Mechanical, electrical and thermal properties
Chapter Three : Materials and prepration method.
Chapter Four : Results and discussion : mechanical, electrical and thermal properties.
References.
American Psychological Association (APA)
Salih, Safa Abd. (2016). Study of some physical properties of epoxy reinforce with Nano particles. (Doctoral dissertations Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-737760
Modern Language Association (MLA)
Salih, Safa Abd. Study of some physical properties of epoxy reinforce with Nano particles. (Doctoral dissertations Theses and Dissertations Master). University of Baghdad. (2016).
https://search.emarefa.net/detail/BIM-737760
American Medical Association (AMA)
Salih, Safa Abd. (2016). Study of some physical properties of epoxy reinforce with Nano particles. (Doctoral dissertations Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-737760
Language
English
Data Type
Arab Theses
Record ID
BIM-737760
