Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Moisture absorption of composites with interfacial storage
Date
2020-07-01
Author
Güloğlu, Görkem Eğemen
Hamidi, Youssef K.
Altan, M. Cengiz
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
141
views
0
downloads
Cite This
© 2020 Elsevier LtdThermosetting polymer composites are often exposed to wet and humid environments, leading to a considerable reduction in their thermo-mechanical properties. Hence, accurate description of the moisture absorption dynamics, including anomalous effects such as molecular bonding and interfacial storage of moisture, is particularly important. In this study, the hindered diffusion model is extended to include the moisture storage at the interface of impermeable fibers or inclusions within the composite. The model is independent of the reinforcement geometry and can be used for fibrous and spherical reinforcements, or for nanoscale additives. The nondimensional formulation and the analytical solution of the model are shown to yield a nondimensional hindrance coefficient that governs the amount of interfacial moisture storage. This phenomenological parameter is expected to be dependent on the interfacial area available for moisture storage, hence should be correlated with the reinforcement volume fraction. To validate this model, available experimental moisture absorption data for epoxy composites containing APS- and nBS-treated glass spheres at different volume fractions are used. The absorption behaviors exhibited by these composites are shown to be successfully described by the hindered diffusion model for all sphere volume fractions. Moreover, the nondimensional hindrance coefficient and the amount of interfacial moisture storage for both composites are found to be linearly related to the volume fraction of the spheres. These results uncover the underlying relationship between the phenomenological model coefficients and the composite microstructure, further validating the theoretical approach to describe the interfacial moisture storage.
Subject Keywords
A. Thermosetting resin
,
B. Interface/interphase
,
C. Analytical modeling
,
D. Moisture
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85083734732&origin=inward
https://hdl.handle.net/11511/98442
Journal
Composites Part A: Applied Science and Manufacturing
DOI
https://doi.org/10.1016/j.compositesa.2020.105908
Collections
Department of Aerospace Engineering, Article
Suggestions
OpenMETU
Core
Contact mechanics of graded materials with two-dimensional material property variations
Gökay, Kemal; Dağ, Serkan; Department of Mechanical Engineering (2005)
Ceramic layers used as protective coatings in tribological applications are known to be prone to cracking and debonding due to their brittle nature. Recent experiments with functionally graded ceramics however show that these material systems are particularly useful in enhancing the resistance of a surface to tribological damage. This improved behavior is attributed to the influence of the material property gradation on the stress distribution that develops at the contacting surfaces. The main interest in t...
ELECTROLESS DEPOSITION OF OXIDATION RESISTANT HIGH TEMPERATURE COATINGS IN MOLTEN SALT
Ömür, İshak Emre; Karakaya, İshak; Erdoğan, Metehan; Department of Metallurgical and Materials Engineering (2021-9-10)
Molybdenum and molybdenum alloy (TZM) can be protected against oxygen in hightemperature environment by developing silicide coating on their surface without damaging their mechanical properties. In this study, molybdenum di-silicide was coated on pure molybdenum and its alloy (TZM) surfaces using a molten salt method. NaCl-KCl-NaF eutectic composition was used as salt mixture, and Na2SiF6 and silicon powder were added to the system as silicon source. X-ray diffraction (XRD), Inductively Coupled Plasma ...
Plasma assisted low temperature electron beam deposited NiO thin films for electro-optic applications
Cosar, Mustafa Burak; Icli, Kerem Cagatay; Özenbaş, Ahmet Macit (2018-05-01)
This study aims to create high quality nickel oxide (NiO) thin films at low temperatures, which is a prerequisite for coatings on temperature sensitive substrates. NiO chunks were evaporated by electron beam source, and NiO thin films were deposited at a thickness value around 250 nm. Depositions were performed at different experimental conditions: oxygen flow rate, deposition temperature, deposition rate, and plasma assistance. Deposited films were analyzed with regard to the structural, optical, and elect...
Polystyrene / boron nitride nanotube composites: synthesis, processing and characterization
Balık, Erdem; Bayram, Göknur; Sezgi, Naime Aslı; Department of Chemical Engineering (2015)
In recent years, boron nitride nanotubes (BNNTs) have been added to polystyrene (PS) which is a widely used thermoplastic polymer in order to improve its thermal and mechanical properties. Solution mixing and melt blending techniques are commonly used methods to prepare polymer-boron nitride nanotube (BNNT) composites. However, these two composite preparation methods have a common problem about the dispersion of fillers in the polymer matrix. In this study, PS-BNNT composites were prepared using masterbatch...
Interface studies between epoxy and recycled rubber
Sipahi-Saglam, E; Kaynak, Cevdet; Akovali, G (2000-07-19)
This work covers studies on interfaces between epoxy and recycled rubber used as toughening phase in epoxy resins. Different surface modification techniques were used to improve the compatibility at the interface between the rubber particles and the epoxy matrix. Silane coupling agents, plasma surface modification and acrylic acid/benzoylperoxide were used to enhance the surface properties of rubber particles. Rubber parts of grinded scrap car tyres with a size range of 355-500 mum after surface treatment w...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
G. E. Güloğlu, Y. K. Hamidi, and M. C. Altan, “Moisture absorption of composites with interfacial storage,”
Composites Part A: Applied Science and Manufacturing
, vol. 134, pp. 0–0, 2020, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85083734732&origin=inward.