نتایج جستجو برای: polymethyl methacrylate pmma
تعداد نتایج: 12682 فیلتر نتایج به سال:
Composites of multi-walled carbon nanotubes (MWCNT) of varied functionality (unfunctionalised and carboxyl and amine functionalised) with polymethyl methacrylate (PMMA) were prepared for use as a bone cement. The MWCNT loadings ranged from 0.1 to 1.0 wt.%. The fatigue properties of these MWCNT-PMMA bone cements were characterised at MWCNT loading levels of 0.1 and 0.25 wt.% with the type and wt...
The aim of this work was to evaluate the flexural strength and surface hardness heat-cured Polymethyl methacrylate (PMMA) modified by addition ZrO2 nanoparticles, TiO2 E-glass fibre at different wt.% concentrations. Specimens were fabricated separated into four groups (n = 10) measure both hardness. Group C control group. specimens in remaining three differed according ratio filler weight PMMA ...
Abstract The study on polymethyl methacrylate (PMMA)-based composites in dental applications has gained much interest recent years, resulting many exciting studies worldwide. In those research, various filler types of reinforcing PMMA have been studied extensively. This combines the microcrystalline cellulose (MCC) particles (0, 1, 2, 3, 5 vol.%) and sisal fiber to strengthen PMMA. We investiga...
Abstract Microelectromechanical system (MEMS) has been highly valued since the size of MEMS structure is miniaturized, spacing between components in nanometer range, and behaviors friction adhesion greatly affect reliability MEMS. An atomic force microscope (AFM) was used to observe surface morphology carbon nanotube (CNT)/polymethyl methacrylate (PMMA) film, X-ray photoelectron spectroscopy (X...
The present work aims to investigate the effect of parameters laser machining process and line angle injection direction sample plastics on electrical resistance Polymethyl Methyl Methacrylate (PMMA)/Multi-Wall Carbon Nanotubes (MWCNT) Nano-composite. was performed samples considering a combination power, feed rate, with respect melted flow parameters. According obtained results from magnetic p...
objectives: the aim of this study was to assess and compare the water sorption and flexural strength of thermoplastic and conventional acrylic resins. materials and methods: water sorption and flexural strength were compared between a thermoplastic modified polymethyl methacrylate (pmma) denture base resin (group a) and a heat-polymerized pmma acrylic resin (group b) as the control group (n=10)...
مقدمه: هدف از این تحقیق، بررسی تأثیر اندازه ی بیمار بر مقدار و توزیع دوز ct (computed tomography) بر اساس فانتوم های استوانه ای استاندارد پلی متیل متااکریلیک (pmma یا polymethyl methacrylate) بود. روش ها: در این تحقیق، یک روش فیلم دوزیمتری دو بعدی با استفاده از فیلم های رادیوگرافی ارایه شد و با به کارگیری فانتوم هایی با قطرهای 10، 16، 24 و 32 سانتی متر، تأثیر اندازه ی بیمار بر توزیع دوز و میزان...
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