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Register a new userSynthesis and Characterization of poly (propylene itaconat ortho phthalate) and Studying some of their Physical and Thermo Properties
اصطناع بولي (بروبلين إيتاكونات أورتوفتالات) و توصيفه و دراسة بعض خصائصه الفيزيائية و الحرارية
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حُضر في هذا العمل عدة عينات من بولي (بروبلين إيتاكونات أورتو فتالات) غير المشبع بُطريقة البلمرة بالتكاثف انطلاقاً من حمض الإيتاكونيك و 2,1 -بروبلين غليكول.
In this work, several samples of poly(propylene itaconat ortho phthalate) based on itaconic acid and 1,2-propylene glycol were prepared by polycondensation.
References used
Shi, W. and Rånby, B., 1994. UV curing of composites based on modified unsaturated polyester. Journal of applied polymer science, 51(6), pp.1129-1139
Jung, S.J., Lee, S.J., Cho, W.J. and Ha, C.S., 1998. Synthesis and properties of UV‐curable waterborne unsaturated polyester for wood coating.Journal of applied polymer science, 69(4), pp.695-708
Dholakiya, B., 2012. Unsaturated polyester resin for specialty applications. In Polyester. InTech
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The recent synthesis of the new polymers has been profoundly affected by
the unique characteristics of Dimer Acid.
These polymers were made up following the condensation with
triethanolamine when was treated in melted phase.
We performed identifi
cation of the physical characteristics of the polymers
such as the molecular weight, in addition to the acid value and hydroxyl value.
Infrared spectroscopy have been used in identification of this polymer.
Also, the rheological behavior has been assessed thermally and shearing
stress by using capillary viscometer.
Our results revealed a reduction in the viscosity with increase of the
shearing stress as will as with rise in the temperature.
A proper matching of agricultural machinery with properties of materials forms the
essential requirements which lead to best performance of machine.
To achieve that goal, availability of data and precision analysis on engineering and
physical prop
erties of these materials is required. This forms important and necessary data
base for the design, development and structure of agricultural machinery and equipments,
control and analysis of machines and determination of efficiency of machines.
This research was carried out to study some engineering and physical properties of seeds of
common Syrian crops to be used in the design and development of some agricultural
machinery and equipments.
Results provided the shapes and dimensions of cells of feeding devices for planting seeds
of some crops namely, wheat, maize, lentil, pea, chick-pea, kidney bean, broad bean and
cotton.
In addition a set of empirical equations were established to be used to predict, with
reasonable accuracy, the physical properties of crops seeds based on measurement of any
of three dimensions (length, width and thickness).
الخواص الهندسية للبذور
الخواص الفيزيائية للبذور
أبعاد البذور
جهاز التلقيم
خلايا التلقيم
جهاز التلقيم ذو الأسطوانة المموجة
آلة البذار
آلة التسطير
Engineering Physical properties of seeds
Physical properties of seeds
Dimensions of seeds
Feeding device
Cells of feeding
Fluted forced feed
Planter
Grain drill
المزيد..
In this work, three new compounds of benzoxazine monomers were
synthesized based on (phenol, hydroquinone, 2-naphthol) and
triethoxysilyl propyl amine (TESPA) and paraformaldehyde. (TESPA)
were used to study its effect on the thermal stability of
polybenzoxazine
resulting from the ring opening polymerization of prepared monomers.
The following imines: 1.8.13.20-tetraaza-13.3.6.18-diphenyl cyclotetracosan-
1.8.13.19- tetraene and butyradamantine, N.N’-di (admantyl) terephthimine
and 1.5.14.18-tetraaza-2.4.15.17-tetramethylcyclotetracosan-1.8.13.19- tetraene
based on dicarbonyl and amines were synthesized by reaction of dicarbonyl
compounds and different amines. The imines have been characterized by EA
(elemental analyses), IR, 1H- NMR and 13C-NMR.
foamed concrete is a concrete made by cement slurry mixed with foaming agent, so
that foamed concrete is lighter than conventional concrete. The objectives of this study is
to produce this kind of concrete, and to study some of its physical and mec
hanical
properties. Mix design of concrete was made for four required densities (1000,
1300,1600,1900 kg/m3), cement content of 350 kg/ m3, and water to cement ratio equal to
0.5. Different tests were performed to determine some properties of product concrete such
as density, compressive strength and splitting tensile strength. The results demonstrated the
possibility of production foamed concrete with wide range of density and strength. The
oven dry density of foamed concrete was in the range of (870-1773 kg/m3) , compressive
strength was in the range of (2.95-16.2 Mpa ), and the splitting strength was in the range
of (0.32-1.76Mpa).
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