Document Details

Document Type : Article In Journal 
Document Title :
Temperature Effect On Impact Properties Of Denture Base Acrylic Material
Temperature Effect On Impact Properties Of Denture Base Acrylic Material
 
Document Language : English 
Abstract : This work is devoted to explore the behavior of a Widely used denture base material during impact loading under different temperatures. Eight different groups of standard Izod impact testing specimens were tested at different temperatures. The chosen temperatures (0, 10, 18. 28. 45, 55. 70° C) were chosen to cover a wide range similar to actual service temperatures. All specimens were soaked in distilled water at the designated temperatures in order to gain the temperature. One hour and two hours were chosen as the time for soaking and the results of both were recorded. The results did not show a clear transition temperature similar to metals. However, a slight increase of fracture energy was developed with the increase of temperature then followed by a decrease in fracture energy with further increase of temperature. An explanation of fracture energy increase is due to the increase of internal frictional resistance of polymer chains movement due to the impact load. This movement becomes easier at higher temperatures. which contribute to a decrease in fracture energy with further increase in temperatures also, the same tests were repeated with specimens with formed notches. These specimens showed a higher increase in fracture energy compared with the cut notch specimens. 
ISSN : 0 
Journal Name : Alexandria Dental Journal 
Volume : 24 
Issue Number : 3 
Publishing Year : 1999 AH
1999 AD 
Article Type : Article 
Added Date : Saturday, June 21, 2008 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
محمد شحاتهShehata, Mohamed ResearcherDoctoratemmmuhammad@kau.edu.sa

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