نتایج جستجو برای: alkali resistant glass fiber

تعداد نتایج: 402187  

2013
F Sharafeddin AA Alavi Z Talei

STATEMENT OF PROBLEM The flexure of the fiber- reinforced composites (FRC) which can be generally used instead of fixed metal- framework prostheses have been more advocated due to the enormous demands for the conservative and esthetic restoration. The flexure of the fiber should be well-fitted to its covering composite. No study has been reported the comparison of the combination of glass and p...

2017
C. Tardif L. Arnault A. Rivière

Several studies of internal fiiction have been performed on silicate glasses. This work has the specificity to refer to isothermal mechanical spectroscopy over a large frequency range and for temperatures between 290 K and 520 K. Experiments were carried out with a single alkali silicate glass and two mixed alkali silicate glasses in order to observe the mixed alkali effect, to follow its evolu...

Journal: :Defense and security studies 2022

Unmanned Aerial Vehicles (UAVs) have high popularity, especially in the military field, but are now also being applied to private and public sectors. One of UAV components that require material technology is wing. The latest developed as a for unmanned aircraft wings composite has strength lightweight. This research aims identify materials can be used wing structures. method this qualitative wi...

ژورنال: مهندسی دریا 2009
علیمحمدی, کاپیتان مالک, موسوی, سید یحیی, پیرایش‌فر, امیر سهیل,

According to the high demand of fiberglass/polyester composites in marine applications, this paper has studied the properties of these composites. It has also been shown that isophthalic polyester has better properties than orthophthalic polyester, in marine applications. This paper has also investigated the vinyl ester and phenolic resin stability especially in the sea water and has shown that...

Journal: :Lab on a chip 2011
Ming Li Dong Pyo Kim

The surface modified polydimethylsiloxane (PDMS) microchannels show a much more inferior performance to the durable and reproducible glass chip. In this paper, a facile approach to preparing a silicate glass modified PDMS microchannel for glass-like performance is presented. This glass-like performance is made possible by a phase conversion of a preceramic polymer--allylhydridopolycarbosilane (...

2013
A. Upendra Varma

Glass Fibre Reinforced Concrete is recent introduction in the field of concrete technology. The present day world is witnessing the construction of very challenging and difficult Civil Engineering Structures. Concrete being the most important and widely used material is called upon to possess very high strength and sufficient workability properties. Concrete the most widely used consrtuction ma...

Journal: :Journal of the Ceramic Association, Japan 1979

Journal: :journal of dental school, shahid beheshti university of medical sciences 0
m. akbari mj. moghaddas sh. gilshan a. boruzi niat

objective: fiber-reinforced composite (frc) posts have recently become more popular for restoring endodontically treated teeth because of providing esthetics, better stress distribution and lower risk of root fracture. resistance against tensile forces dislodging the post from the root canal is a prerequisite for these posts. this study aimed to evaluate the tensile retention (strength) of intr...

Journal: : 2022

This paper summarizes the results of research in field polymer chemistry on creation new heat-resistant epoxy polymers and composites based resins various functionality, hardeners catalysts chemical structures. Samples organo -, glass- carbon-fiber plastics were manufactured tested using existing technologies with a positive result at enterprises PJSC NPO Iskra, JSC OKB Novator, UNIIKM (corp.)....

Journal: :journal of agricultural science and technology 2011
b. mohebby p. fallah-moghadam a. r. ghotbifar s. kazemi-najafi

the influence of maleic anhydride-polypropylene (mapp) (0, 2, 3 and 5%) as a compatibilizer on the wettability of polypropylene/wood flour/glass fiber hybrid composites was studied by using the contact angle determination technique. sample slats with a cross section of 10×70 mm were made by a twin screw extruder. specimens were conditioned at room temperature and the angles between the water dr...

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