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Article
Thermo-Chemical Behavior of Epoxy Composite (EP/PVC) Reinforced by Addition of Scrap Tires

Author: Raghad U.Abass
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 6 Part (B) Scientific Pages: 769-776
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The high performance and unique utilization properties applied by designers according to improvement of thermal and mechanical products were reinforced by particulate materials. The present study deals with the preparation of a composite system (EP/PVC). afterward the estimation of thermo-chemical behaviour of epoxy composite (EP/PVC) reinforced by addition of micro-fillers particulate of waste scrap tires (WST). Three different sets of epoxy-PVC composites are fabricated with addition of 0, 0.25, and 0.4 wt% of WST particulates. These composites have been prepared and both chemical reactivity absorbance and thermal conductivities are achieved. From results it appeared that a decreasing in thermal conductivity values about 55 % for 0.25wt % for a micro-WST of epoxy composite system, of 0.4wt. %recorded decreasing of thermal conductivity at88 %when compared to epoxy composite system (EP/PVC). The results show that the (WST) micro-fillers particles show an insulation polar behaviour at 0.4 wt. % at which a random behaviour in thermal conductivity is recorded .In addition to an experimental examination of chemical activity absorbance for both composite system before and after additive of micro-filler particulate of waste scrap tires (WST) in different soaking medium (normal and acidic solutions) and different residence times (0-120 hrs) respectively. The results proved that an improvement chemical activity occurred for optimum sample no. 3 of (2.5/ .4 + .4 (EP/PVC + WST) that have minimum loss in weight as (0.001) under both soaking medium (100% H2O, 10% H2SO4) rather than base composite system (EP/PVC) and other improved one of .25 wt. % from WST of (0.01 – 0.05) respectively.


Article
Synthesis, Characterization, Theoretical Studies and Bioactivity of Pd(II), Rh(III), Ru(III) and Pt(IV) Complexes with 1,8-Naphthalimide Derivative
تحضير وتشخيص ودراسة نظرية وفعالية بايولوجية لمعقدات الايونات Pd(II), Pt(IV), Rh(III), Ru(III)مع مشتق1, 8 – نفثال ايمايد

Authors: Rehab Abd Almahdi Al-Hasani رحاب عبد المهدي الحسني --- Asia Hameed Abed اسيا حميد عبد --- Sura Khaleel Ibrahim سرى خليل ابراهيم
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2016 Volume: 57 Issue: 4B Pages: 2575-2591
Publisher: Baghdad University جامعة بغداد

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Abstract

A New Mannich base [N-(4-morpholinomethyl)-1, 8-naphthalimide] (L), was synthesized and characterized by C.H.N analysis, FTIR, UV-Vis and 1HNMR spectral analysis. Metal ion complexes of (L) with Pt(IV), Rh(III), Ru(III) and Pd(II) ions were prepared and characterized by FT-IR, and UV-Vis spectroscopy, elemental analysis (C.H.N), flame atomic absorption techniques as well as magnetic susceptibility and conductivity measurements. The results showed that metal ion complexes for all complexes were found in [1:2] [M:L] ratio except for Pd(II) complex which was found in [1:1] [M:L] ratio. Hyperchem-8 program has been used to predict structural geometries of the (L) and it's complexes in gas phase. The electrostatic potential (EP) of the (L) was calculated. Furthermore, the heat of formation (∆Hf^o), binding energy (∆Eb), vibration spectra, electronic spectra and bond length for the ligand (L) and its metal ion complexes were calculated by PM3 methods. The antimicrobial activity of (L) and its complexes has been extensively studied against pathogenic bacteria such as (Pseudonomous aerugionosa) as gram negative and (Bacillus Subtilis) as gram positive and fungi (Candida albicans) and (Aspergillus flavus) by agar-well diffusion technique.

تم تحضير قاعدة مانخ الجديدة [N-(4- مورفولينومثيل)-8,1- نفثال ايمايد] (L) والتي شخصت باستخدام التحليل الدقيق للعناصر(C.H.N) وطيف الاشعة تحت الحمراء (FT-IR) وطيف الرنين النووي المغناطيسي (H.NMR1). حضرت معقدات الليكاند (L) مع ايونات العناصر Pd(II), Ru(III), Rh(III) ] Pt(IV) ] والتي شخصت باستخدام اطياف الاشعة تحت الحمراء وفوق البنفسجية – المرئية والتحليل الدقيق للعناصر (C.H.N) والامتصاص الذري اللهبي بالاضافة الى قياسات التوصيلية الكهربائية والحساسية المغناطيسية . اظهرت النتائج ان المعقدات المحضرة كانت بنسبة [2:1] [L:M] مع [Ru(III), Rh(III), Pt(IV) ] ماعدا مع [Pd(II)] كانت النسبة [1:1] [L:M]. استخدم برنامج (8-Hyperchem) لاستنتاج التراكيب الهندسية لكل من الليكاند (L) ومعقداته في الطور الغازي . تم حساب الجهد الالكتروستاتيكي (Ep) لليكاند (L) , بالاضافة الى ذلك تم حساب حرارة التكوين (∆Hf°) وطاقة التاصر (∆Eb) والتردد الاهتزازي والاطياف الالكترونية واطوال الاواصر لليكاند (L) ومعقداته باستخدام الدالة (PM3) و تم تقيم الفعالية لليكاند (L) ومعقداته ضد البكتريا (Pseudonomous aerugionosa) السالبة لصبغة كرام و (Bacillus Subtilis) الموجبة لصبغة كرام و الفعالية المضادة للفطريات باستخدام النوعين (Candida albicans) و Aspergillus flavus)) باستخدام تقنية التنافذ .

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