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
Characterization of non-Fickian moisture absorption in thermosetting polymers
Date
2015-05-22
Author
Güloğlu, Görkem Eğemen
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
153
views
0
downloads
Cite This
© 2015 AIP Publishing LLC.A recently developed moisture absorption model for thermosetting polymers that combines the non-Fickian, diffusion hindrance effects and three-dimensional anisotropy is introduced. The hindered diffusion model is shown to predict both short term Fickian and long term anomalous moisture absorption behavior often observed in thermosetting polymers and their composites. The salient characteristics of long term moisture uptake such as the equilibrium moisture content and the effect of non-Fickian phenomena are presented. Anomalous moisture concentration profiles predicted by the two-dimensional solution of hindered diffusion model are demonstrated for various cases, including the through-the-thickness moisture profile of a 40-ply, quartz/bismaleimide (BMI) composite laminate. The effects of diffusion hindrance and anisotropy on the two-dimensional, through-the-thickness concentration profiles are illustrated. The moisture absorption parameters for an EPON 862 epoxy laminate are recovered from the experimental moisture absorption data. The hindered diffusion model is shown to accurately predict the moisture uptake of EPON 862 over the complete absorption time period. The non-Fickian effects governed by the hindrance coefficient are identified for both EPON 862 and quartz/BMI composite laminate. It is shown that the quartz/BMI laminate displays significant non-Fickian behavior compared to EPON 862 epoxy resin.
Subject Keywords
Anisotropy
,
Concentration Profiles
,
Hindrance Effects
,
Moisture Absorption
URI
https://hdl.handle.net/11511/98482
DOI
https://doi.org/10.1063/1.4918435
Conference Name
30th International Conference of the Polymer Processing Society, PPS 2014
Collections
Department of Aerospace Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
Experimental and theoretical investigation of non-Fickian moisture absorption of quartz/BMI laminates fabricated by preconditioned prepregs
Güloğlu, Görkem Eğemen; Hurdelbrink, Keith R.; Anderson, Jacob P.; Altan, M. Cengiz (2016-03-09)
© 2016 AIP Publishing LLC.Moisture content of composite prepregs are known to significantly affect the process-induced laminate microstructure and formation of microvoids during cure. In this study, the moisture absorption of eight-ply quartz (AQ 581)/Bismaleimide (BMI) composite laminates is investigated. Four different types of composite laminates are fabricated using eight plies which were preconditioned before curing at 2%, 40%, 70% or 99% relative humidity. Two different sized samples from each laminat...
Preparation of 2D g-C3N4/TiO2 Heterojunction Nanocomposites for Photocatalytic Applications
Öztürk, Abdullah; Gündoğmuş, Pelin; Bouzıanı, Asmae; Erdoğan, Nursev (null; 2018-10-27)
In the present study, 2-dimensional (2D) graphite carbon nitride (g-C3N4)/titanium dioxide (TiO2) nanocomposites have been synthesized to enhance visible light photocatalytic activity of TiO2. Synthesis of nanocomposites was done in 2 steps. First, g-C3N4 was realized by heating the melamine (2,4,6- Triamino-1,3,5- triazine) in nitrogen atmosphere. Then, g-C3N4 powder was dissolved in deionized water. Titanium precursor (Titanium tetra isopropoxide) and nitrogen source (HNO3) were mixed and added into g-C3N...
Characterization of doped polypyrrole-poly(methylthienyl methacrylate) films via pyrolysis mass spectrometry
Athar, Imran; Hacaloğlu, Jale; Toppare, Levent Kamil (2004-07-01)
This work presents the characterization of p-toluene sulfonate doped polypyrrole-poly(methylthienyl methacrylate) films synthesized by electrochemical polymerization of pyrrole on a poly(methylthienyl methacrylate) coated anode. Pyrolysis mass spectrometry was used to characterize the polymer. The study was focused on the influence of each of the components on the thermal degradation behaviour of the other. The results indicated that decomposition of the matrix polymer, ie poly(methylthienyl methacrylate), ...
Fabrication of low reflective nanopore-type black Si layer using one-step Ni-assisted chemical etching for Si solar cell application
Takaloo, AshkanVakilipour; Kolahdouz, Mohammadreza; POURSAFAR, Jafar; ES, FIRAT; Turan, Raşit; Ki-Joo, Seung (IOP Publishing, 2018-03-01)
Nanotextured Si fabricated through metal-assisted chemical etching (MACE) technique exhibits a promising potential for producing antireflective layer for photovoltaic (PV) application. In this study, a novel single-step nickel (Ni) assisted etching technique was applied to produce an antireflective, nonporous Si (black Si) in an aqueous solution containing hydrofluoric acid (HF), hydrogen peroxide (H2O2) and NiSO4 at 40 degrees C. Field emission scanning electron microscope was used to characterize differen...
Synthesis of opaque and colored hollow polymer pigments
Karakaya, Ekin; MAVİŞ, BORA; Gündüz, Güngör (2017-09-01)
A parametric study was carried out to investigate the effects of process parameters on the properties of opaque and/or colored polymer pigment. The core was synthesized using methyl methacrylate (MMA), methacrylic acid (MAA), and ethylene glycol dimethacrylate, and the shell from styrene. The surfactant/water (S/W) ratio was changed between 0.56 and 1.46, and the best ratio was determined to be 0.97. The increase in the amount of MAA and the pH of the medium increases the diameter of the swollen particles. ...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
G. E. Güloğlu and M. C. Altan, “Characterization of non-Fickian moisture absorption in thermosetting polymers,” Ohio, Amerika Birleşik Devletleri, 2015, vol. 1664, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/98482.