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Journal of Applied Sciences
  Year: 2007 | Volume: 7 | Issue: 22 | Page No.: 3442-3450
DOI: 10.3923/jas.2007.3442.3450
 
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Effect of Temperature on the Stiffness of Polyvinyl Chloride and Chlorinated Polyvinyl Chloride Joints Under Bending

Hasan A.S. Al-Hashem and Mushari A.H. Al-Naeem

Abstract:
The main objective of this study was to determine the effect of temperature on the bending capacity and stiffness of PVC and CPVC cemented socket joints using test specimens as simply supported beams subjected to different bending points. The tests were conducted under six different temperatures (room temperature, 23° C, a control treatment), 50, 60, 70, 80 and 90° C, three bending points and with a deflection of 55 mm using a hydraulic testing machine. The results show that, at room temperature, the mean maximum bending capacity of CPVC joints was close to that of PVC joints. The rate of decrease in the mean maximum bending force of PVC joints was higher than CPVC joints with an increase in temperature. A dramatic decrease in the mean maximum bending force of PVC joints was observed with an increase in temperature from 60-70° C, where the glass transition temperature of PVC material was within the above stated temperature range. At room temperature, the stiffness of PVC joints was slightly more than CPVC joints. But, as the temperature increased, the rate of decrease in the stiffness of PVC joints was more than CPVC joints. The PVC joints lost 80% and the CPVC joints lost 47.6% of its stiffness with an increase in temperature from 23-90° C. The study showed an excellent potential for the selection of optimum temperature for using PVC and CPVC joints under arid environment.
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How to cite this article:

Hasan A.S. Al-Hashem and Mushari A.H. Al-Naeem, 2007. Effect of Temperature on the Stiffness of Polyvinyl Chloride and Chlorinated Polyvinyl Chloride Joints Under Bending. Journal of Applied Sciences, 7: 3442-3450.

DOI: 10.3923/jas.2007.3442.3450

URL: https://scialert.net/abstract/?doi=jas.2007.3442.3450

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