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Register a new userSynthesis and characterization of fluorescent polymer
تحضير و توصيف بوليمير متألق
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يتناول هذا البحث طريقة جديدة لاصطناع مادة بوليميرية مسامية و متألقة ضوئياً. تعتمد هذه الطريقة على استخدام الأمواج الميكروية ( microwaves ) في تحضير هذه المادة البوليميرية من أجل اختصار زمن التحضير الذي يبلغ ثلاثة أيام عند درجة حرارة °C 081 بالطرائق التقليدية.
The present research aims at synthesizing micro-porous and fluorescent polymer by microwave assisted synthesis allowing to reduce preparation time of 3 days at 180 °C using conventional method.
References used
Kerileng M. Molapo, Peter M. Ndangili, Rachel F. Ajayi, Gcineka Mbambisa, Stephen M. Mailu, Njagi Njomo, Milua Masikini, Priscilla Baker and Emmanuel I. Iwuoha . Electronics of Conjugated Polymers (I): Polyaniline. Int. J. Electrochem. Sci., 7 (2012) 11859 – 11875
D. Sydorov, I. Duboriz, A. Pud, Poly(3-methylthiophene)–polyaniline couple spectroelectrochemistry revisited for the complementary red–green–blue electrochromic device , Electrochimica Acta, 1 September 2013, Pages 114–120
F. HEIDARIZADEH and F. ABADAST. Reactions of Some Nucleophiles with Pyrylium Salts. ORIENTAL JOURNAL OF CHEMISTRY . 2011, Vol. 27, No. (4):Pg. 1421-1436
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In this research work, an epoxy polymer- Carbon Black composite has been
prepared and characterized regarding the effects of adding carbon black to
epoxy polymer on some structural properties such as polymerization behavior,
cross-linking reaction
time and yield and some properties e. g. glass transition
temperature (Tg), Young modulus (E) and flexural strength (σ).
The cross-linking reaction and glass transition temperature were studied by
Differential Scanning Calorimetry (DSC), and the mechanical tests were done
by Universal Testing Machine.
In this study, several samples of a common polymer (aniline-phenolformaldehyde)
we prepared by condensation polymerization method based
on aniline, phenol, formaldehyde and in the presence of a catalyst of
ammonia solution at different concentrations.
يعد الميتانول و الإيتانول من أكثر المحلات شيوعاً، و بما أن درجة غليانها أقل من مئة
درجة مئوية فإنها تتطاير بشكل سريع. و على سبيل المثال، يستعمل الميتانول في تصنيع
الأصبغة و العقاقير و العطور.. و هو شديد السمية، لذلك من الضروري تطوير محسات لكشفه.
أ
ما غاز الأمونيا فهو من ملوثات الهواء و له مصادر كثيرة مثل صناعة الأسمدة و أنظمة
التبريد.. و من هنا أهمية كشفه.
Some samples of alumina supporting with sulfate ions and molybdenium were
prepared by impregnation method. Supported samples were calcinated at 550°C for 6h.
Presence of sulfate ions and molybdenium lead to decreasing of the specific surface area o
f
alumina, and in the ease of molybdenium the decreasing value was higher. The total pore
volume was decreased with the pore size was increased. XRD patterns showed that the
incorporation of sulfate ions and molybdenium did not affect crystalin structure of
alumina. FTIR spectra showed the bonding between sulfate ionsmolybdenium
and
alumina. The TG-DTA studies showed that the losses mass was decreased when the sulfate
ions and molybdenium were incorporated, sulfate ions and molybdenium oxide
decomposed at ~700°C and ~800°C respectively .
Three samples of alumina_zirconia mixed oxid AL2O3_Zr2O4(1;0.25;0.1) mole ratio
based on oxides were prepared by sol-gel precipition method. The system AL2O3_Zr2O4
was obtained by mixing tow gel of alumina and zirconia precipited from aqueous solut
ions
of alumina nitrate and zirconium chlorid using ammonium hydroxide solution as precipited
agent. The system after mixing was allwed to settle for 24 h. The resuling precipitate was
filtered off and washed several times with deionized water and dried at 120°C for 24 h.
The powdered oven-dried hydrous alumina_zirconia was immersed in ammonium sulfate
solution(1) M for 24 h to incorporate sulfate ions. The resulting sample was dried at 120°
C for 24 h, calcined at 550°C for 6 h. The textural properties were determined by terating
of adsorption data of N2 at 77 K, and the results showed the changings in the textural
properties.The TG_DTA analysis showed the thermal stable of the samples in a long rang
of temperature. FTIR spectra showed that the sulfate ions were incorperated in the saples.
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