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نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
Polymethylmethacrylate-montmorillonite composites: preparation, characterization and properties
Polymethylmethacrylate-montmorillonite composites: preparation, characterization and properties
 
لغة الوثيقة : الانجليزية 
المستخلص : The objective of this work was directed to solve a problem of polymerization shrinkage in acrylic resin polymethylmethacrylate (PMMA) material. Organophilic montmorillonite (clay tone) was added up to 1 % by weight to one commercial type of PMMA powder to form PMMA-MMT composite. Acrylic specimens were processed by the conventional heat curing method following manufacturer's instructions. Thermogravimetric analysis data indicates that polymer-clay composites exhibit significant increase in thermal stability with very small amount of inorganic content. The morphology of the composites was verified using scanning electron microscopy revealing the absence of large mineral aggregates. Interlamellar spacing was measured from wide angle X-ray diffraction. The d(OOI) spacing of clay was expanded to 18 A in clay tone and the intensity of the peaks is progressively reduced with increasing the concentration of polymer in the composites samples. Warpage and linear dimensional change measurements were achieved using 'traveling microscope' and one way analysis of variance was employed to compare results. The results indicated that there was a significant decrease of warpage and linear dimensional changes between PMMA specimens and that of PMMA-MMT composite materials. 
ردمد : 0 
اسم الدورية : Polymer 
المجلد : 42 
العدد : 1 
سنة النشر : 2001 هـ
2001 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 باحث مشاركدكتوراهmmmuhammad@kau.edu.sa
نهال صلاح الدينSalahuddin, Nehal باحث رئيسيدكتوراه 

الملفات

اسم الملفالنوعالوصف
 Polymethylmethacrylate-montmorillonite composites.pdf pdf 

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