The effect of presence of gelatin, pectin and starch with 0.5% and
carrageenan 0.2% in the yogurt had been studied. Many tests techniques
as viscosity, penetration for yogurt gel, whey separation and sensory
evaluation had been established and com
pared.
The objective of this research is to study the effect of wood ash in
rheological properties of Self – compacting mortar (SCM). By
implemented some mixtures with different percentage from wood
ash with two kinds of cement and three kinds of super plasticizer
and study the effect in slump flow and yield stress to this
mixtures.
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.
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.
