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نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
Temperature Effect On Impact Properties Of Denture Base Acrylic Material
Temperature Effect On Impact Properties Of Denture Base Acrylic Material
 
لغة الوثيقة : الانجليزية 
المستخلص : 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. 
ردمد : 0 
اسم الدورية : مجلة الاسكندرية لطب الاسنان 
المجلد : 24 
العدد : 3 
سنة النشر : 1999 هـ
1999 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Saturday, June 21, 2008 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
محمد شحاتهShehata, Mohamed باحثدكتوراهmmmuhammad@kau.edu.sa

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