State of cure evaluation by different experimental methods in thick rubber parts

• Autorzy: Zaimova D , Bayraktar E. , Dishovsky N
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aims of this paper is to quantify the state of cure by different techniques (physico-chemical; mechanical; thermal; spectroscopic) on the thick elastomeric composites (rubber parts). An optimization is aimed from the experimental results. For this purpose, a detailed comparison is carried out with simulation for industrial applications. Design/methodology/approach: Comparison among the used experimental methods for measuring curing phenomenon is made by choosing the following criteria: destructivity, need of specific sample geometry, reversion detection, error and timing; validation the numerical simulation with experimental results; As a first step, test sheets were obtained from the rubber-based compound. Different methods (DSC, NMR, mass swelling, tensile test, compression set test, relaxation, hardness, shear stress etc.) were used to quantify the state of cure experimentally. The same techniques were applied for evaluating the state of cure in a thick part obtained from the tested compound. Then the results for the thick part were correlated with the results for the test sheets obtained by rheometer. Finally, a comparison was carried out among the used methods by several criteria. Also numerical data obtained for evolution of state of cure in the thick parts is compared by means of special software with the experimental data. Finding Applications of different methods have given very successful results for measuring the state of cure in the test sheets. However, the present results showed that some of the mechanical methods (shear stress, stress-strain, compression set and relaxation) are not suitable for measuring the state of cure in thick parts but NMR, DSC, mass swelling and hardness are very suitable. Research limitations/implications Certain test such as shear stress and Dynamic Scanning Calorimetry (DSC) give high values of error and don’t detect reversion. Additionally, a specific geometry of the specimen is needed for relaxation and tensile tests. Practical implications: Certain tests such as mass swelling, tensile and hardness test give very practical and reliable results for measuring the state of cure in rubber parts in industrial applications. Originality/value A good correlation has been found between numerical and experimental results which give the possibility to make a reliable prediction on the distribution of state of cure in thick parts. Mass swelling method has been adapted to this research conditions and this modified test gave better results than other used methods.

Słowa kluczowe

EN

vulcanization; elastomeric composites; optimization methods; curing; simulation

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2011
• Tom: Vol. 44, nr 2
• Strony: 161--167
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Zaimova D

• University of Chemical Technology and Metallurgy 8 Kliment Ohridski blvd., Sofia 1756, Bulgaria
• Supmeca/LISMMA-Paris, School of Mechanical and Manufacturing Engineering, France

autor

Bayraktar E.

• Supmeca/LISMMA-Paris, School of Mechanical and Manufacturing Engineering, France

autor

Dishovsky N

• University of Chemical Technology and Metallurgy, 8 Kliment Ohridski blvd., Sofia 1756, Bulgaria

Bibliografia

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