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Register a new userStudy and development of Nitrile-Butadiene rubber (NBR) formulations
دراسة و تطوير تراكيب مطاطية من النتريل بوتاديين NBR) Rubber)
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Publication date
2017
and research's language is
العربية
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يهدف العمل إلى تحضير خلطات مختلفة من مطاط نتريل بوتاديين (NBR) طراز Krynac 3370F مع نسب مختلفة من ثلاث مواد مقوية لاعضوية: تقليدية، هباب الفحم N330 ، و جديدة نانومترية، هباب السيليكا aerosil 200 ، و ميكروية الطف البركاني (السكوريا) و توصيف خصائصها الميكانيكية.
The present research aims at preparing and characterizing of different formulations of NBR Krynac 3370F rubber with different contents loading amounts of three inorganic reinforcing fillers: conventional N330 carbon black, new nanometric aerosil 200 silica and micrometric volcanic tuff scoria.
References used
Jacobs, James A. and Thomas F. Kilduff. Engineering Materials Technology:Structures, Processing, Properties and Selection,Elastomers: Natural and Synthetic Rubbers. s.l. : Pearson Education, Inc., 2005
Schaefer, Ronald J. Mechanical Properties Of Rubber. Chapter 33. 1996
Klingender, Robert C. Handbook Of Specialty Elastomers. Chapter12: Plasticizers,Process Oils, Vulcanized Vegetable Oils. s.l. : CRC Press, 2008
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The present research aims at preparing and characterizing different formulations of SBR1712 rubber with different loading amounts of two inorganic fillers: conventional N330 carbon black, new nanometric aerosil 200 fumed silica and local micrometric volcanic tuff.
In this work, Rheological and mechanical properties of acrylonitrile –
butadiene – styrene/ corn starch composites (ABS/starch) were studied. The
composites were prepared using a laboratory scale single screw extruder.
Rheological properties were
determined using the single screw extruder, and
apparent shear rate (γ), apparent shear stress (τ), apparent viscosity (η), non-
Newtonian index (n) and flow activation energy at a constant shear rate (Eγ)
and constant shear stress (Eτ) were determined. Mechanical properties in term
of tensile tests were performed using Testometric M350-10KN, stress at break,
strain at break and Young's modulus were determined. Rheological results
showed that the composites are pseudo plastic in behavior, and the apparent
viscosity of the composites increases with increasing starch content above the
additive rule which indicates a partial compatibility in the composite, also it
was found that the flow activation energy of the composite increases with
increasing starch content. Also it was found that the activation energy value at
a constant shear stress is more than that at a constant shear rate. The
mechanical results showed that the strain at break of the composite decreases
sharply by the presence of starch, whereas the young's modulus increases with
increasing starch content.
In the present work, the rheological and mechanical properties of
polypropylene /thermoplastic starch (PP/TPS) and acrylonitril-butadienestyrene/
thermoplastic starch (ABS/TPS) blends were investigated. Starch was
plasticized using glycerol, and b
lends were prepared using a laboratory scale
with single screw extruder. Rheological properties of the prepared blends were
determined using a capillary rheometer. Mechanical properties were studied in
term of tensile tests, stress at break, strain at break and Young's modulus were
determined.
This paper is targeting towards studying on the possibility to modify some properties
of unsaturated Polyester compounds by adding rubber materials in order to improve its
flexibility property. For this target, Waste of cars' tires was used in two
forms powder and
pieces, and the liquid rubber Styrene-butadiene was used as another type of rubber. After
that the modification was detected by measuring the possibility of the resulted compound
materials to absorb vibration power, and reduce the noise that is produced by eccentric
crankshaft circulation at different rotating speeds, (300, 500, 700) rpm.
Test results demonstrate that there will be Modification in the construction of the
compounds at low rotating speeds (300 rpm). On the other hand, it demonstrates different
results at high rotating speeds.
This study has been performed in Agriculture Research Directorated Labs, Ministry of
Science and Technology/Iraq, aimed to use different formulations of weaning food
contained different concentrations of black rice flour, brown rice, peas and oat c
hips. Some
physical treatments like cleaning, peeling and milling to rice and and germination, chard,
peeling, drying and milling to peas were used to make these four formulations, which were
chosed depended on chemical analysis (moisture, protein, ash, fiber, carbohydrate, fat and
energy) in addition the estimation of some minerals (Ca, Fe and Zn) comparing with
recommendation of FAO weaning food and functional properties; like bulk density (BD),
foam capacity (FC) and swelling power (SP). Sensory evaluation was also conducted.
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