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
Nondestructive determination of curing state of rubbers during vulcanization process
Date
2018-06-15
Author
Ülger, C
Aydın, E
Yelbay, Hasan İlker
Kutlu, A
Gür, Cemil Hakan
Metadata
Show full item record
Item Usage Stats
183
views
0
downloads
Cite This
EPDM (ethylene-propylene-diene monomer) elastomer is one of the most widely used synthetic rubbers in several industries ranging from automotive to heating, ventilation, and air conditioning. Gaskets, bumpers, auto parts, auto brake systems, electrical installation, dust covers, weather stripping and conveyor belts are typical application examples. Quality control is important to ensure the rubber compound products meet the requested mechanical properties. Satisfactory properties can be obtained only by proper compounding and by appropriate vulcanization. Vulcanization is a chemical process that converts natural rubber and other polydiene elastomers into cross-linked polymers which have much improved mechanical properties. The aim of this study is to develop a non-destructive quality control method to determine the curing state, and thus the mechanical properties of elastomers by measuring ultrasonic wave velocity. A series of samples were prepared by curing the EPDM compound at 125oC for different periods ranging from 5 to 90 minutes. The results of the mechanical tests and ultrasonic measurements showed that ultrasonic wave velocity, hardness, and the maximum force increase with increasing curing time, in contrast to the tangent delta values.
Subject Keywords
Ultrasonics
,
Process control
,
Plastics
URI
http://www.ndt.net/?id=22825
https://hdl.handle.net/11511/84109
Conference Name
12th European Conference on Non-Destructive Testing (2018)
Collections
Unverified, Conference / Seminar
Suggestions
OpenMETU
Core
Microstructural and dielectric properties of naphthalene based polyamide/β-Ni(OH)2 nanocomposites
Sezer, Selda; Öz, Erdinc; ALTIN, SERDAR; Vural, Sema; GÜLTEK, AHMET; KÖYTEPE, SÜLEYMAN; Nilüfer Kıvılcım, F. (2018-01-01)
Background: Aromatic polyamides are important materials having outstanding thermal, electronic and mechanical properties among high performance polymers and industrial plastics. In addition, aromatic polyamides can be utilized in electronic devices with their low dielectric constant which indicates the storage capacity of these devices. Objective: Free volume is very important for dielectric materials and increase in free volume of a polymer reduces its dielectric constant. The aims of the current study are...
Water Impact Resistant and Antireflective Superhydrophobic Surfaces Fabricated by Spray Coating of Nanoparticles: Interface Engineering via End-Grafted Polymers
Torun, Ilker; Celik, Nusret; Hancer, Mehmet; Es, Fırat; Emir, Cansu; Turan, Raşit; Önses, Mustafa Serdar (American Chemical Society (ACS), 2018-12-11)
Fully transparent and water impact resistant superhydrophobic coatings are of great importance for a range of applications including photovoltaics, photonics, automotive windshields, and building windows. A widely utilized approach to fabricate such coatings involves solution-based deposition of hydrophobic nanoparticles. A central challenge is that these coatings do not simultaneously offer high levels of water repellency, perfect transparence, and water impact resistance. Here we demonstrate that end-graf...
Mathematical modeling of adsorption/desorption systems for chemical heat pumps
Yurtsever, Ahmet Onur; Uludağ, Yusuf; Karakaş, Gürkan; Department of Chemical Engineering (2011)
Despite their limited commercial applications, chemical heat pumps (CHP) have been considered as an important alternative to conventional heating and cooling technologies. In this study, the adsorption-desorption of ethanol over activated carbon was applied on the CHP reactor. The ethanol vapor - activated carbon adsorption rate was determined at 30, 60, 90 and 120° experimentally by using Intelligent Gravimetric Analyzer C(IGA). The experimental adsorption data were used on the transient modeling of reacto...
Thermodynamic analysis of plasma-assisted reforming of methane
Maşera, Kemal; Taylan, Onur; Sustainable Environment and Energy Systems (2016-6)
Conventional techniques of syngas production use the exhaust gas of combustion of fossil fuels or feedstock like biomass itself. High temperatures are required for this process. To achieve necessary high temperatures, about 30% of feedstock is used initially. Another disadvantage of these conventional techniques is the tar formation which can damage the system by blocking the equipment. On the other hand, plasma processes are more efficient techniques to convert energy like solar, electrical, etc. int...
Non-Destructive Characterization of Cold Rolled Low-Carbon Steels
Grum, Janez; Gür, Cemil Hakan; Yelbay, Hasan İlker; Sturm, Roman; Pechnik, B (2018-12-26)
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
C. Ülger, E. Aydın, H. İ. Yelbay, A. Kutlu, and C. H. Gür, “Nondestructive determination of curing state of rubbers during vulcanization process,” presented at the 12th European Conference on Non-Destructive Testing (2018), Gothenburg, Sweden, 2018, Accessed: 00, 2021. [Online]. Available: http://www.ndt.net/?id=22825.