research centers


Search results: Found 3

Listing 1 - 3 of 3
Sort by

Article
Effect Of Thermal Annealing On The Optical Properties Of Thin Films Of Polymer Blend (PMMA:PVC:PS)

Author: Ali N. Sabbar 1*, Karar M.Talib2, and Hassan T. Badh1
Journal: Almuthanna Journal of Pure Science (MJPS) مجلة المثنى للعلوم الصرفة ISSN: 22263284 Year: 2018 Volume: 5 Issue: 1
Publisher: Al-Muthanna University جامعة المثنى

Loading...
Loading...
Abstract

In this paper, we report upon preparation and optical properties of the polymer blend(50%PMMA:25%PVC:25%PS) thin films. The thin films have been prepared with specific ratios using the castingtechnique at normal weather conditions. The films were subjected to heat treatment in varying temperatures for threehours. The results showed that increase thermal annealing temperature leads to decrease values of the direct and indirectenergy gap, but increase the extinction coefficient and optical conductivity. The refractive index, real and imaginarydielectric constants showed a heterogeneous behaviour. Thermal annealing by 80 oC and up leads to deformation thethin films.


Article
Thermal conductivity and diffusion coefficient of polymer blend 80%EP/20%UPE reinforced with sand particles
دراسة التوصيلية الحرارية ومعامل الانتشار لخليط بوليمري من 80%EP/20%UPE مدعم بدقائق الرمل

Authors: R. H. Khalaf رافد حماد خلف --- A. H. Sarraf عبد الحميد الصراف --- F. H. Anter فائق حماد عنتر
Journal: Iraqi Journal of Physics المجلة العراقية للفيزياء ISSN: 20704003 Year: 2018 Volume: 16 Issue: 38 Pages: 17-25
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

New polymer blend with enhanced properties was prepared from (80 %) epoxy resin (Ep), (20%) unsaturated polyester resin (UPE) as a matrix material. The as-obtained polymer blend was further reinforced by adding Sand particles of particle size (53 µm) with various weight fraction (5, 10, 15, 20 %). Thermal conductivity and sorption measurements are performed in order to determine diffusion coefficient in different chemical solutions (NaOH, HCl) with concentration (0.3N) after immersion for specific period of time (30 days). The obtained results demonstrate that the addition of sand powder to (80%EP/20%UPE) blend leads to an increase of thermal conductivity, with an optimum/minimum diffusion coefficient in (HCl)/(NaOH), respectively.

تم في هذا البحث تحضير خليط بوليمري مكون من رتنج الايبوكسي و البولي استر الغير مشبع بوصفة مادة اساس بنسبة (80%) من الايبوكسي و (20%) من البولي استر الغير مشبع, وتم تقوية الخليط بإضافة دقائق من الرمل بحجم (53 µm). وتمت دراسة الفحوصات الفزيائية التي تضمنت حساب معامل التوصيل الحراري، وكما تم اجراء اختبار الامتصاصية لحساب معامل الانتشار لجميع النماذج وذلك بعد غمرها في الوقت نفسه ولفترة زمنية معينة بحدود (30 يوم) في محاليل كيميائية مختلفةNaOH, HCl) ) وبعارية لمحاليل (N 0.3), حيث وجد ان اضافة مسحوق الرمل (53 µm) الى الخليط البوليمري(EP/UPE) تؤدي الي زيادة التوصيلية الحرارية, كما وجد ان أعلى واقل قيمة لمعامل الانتشار ظهرت في محلول (NaOH)/(HCl) على التوالي.


Article
Effects of Irradiation by UV- Acceleration on Mechanical Properties of Polymer Blends (Polyester: Starch)

Authors: Sihama I. Salih --- Qahtan A. Hamad --- Safaa N. Abdul Jabbar --- Najat H. Sabit
Journal: AL-NAHRAIN JOURNAL FOR ENGINEERING SCIENCES مجلة النهرين للعلوم الهندسية ISSN: 25219154 / eISSN 25219162 Year: 2018 Volume: 21 Issue: 1 Pages: 147-152
Publisher: Al-Nahrain University جامعة النهرين

Loading...
Loading...
Abstract

This work covers mixing of unsaturated polyester (un- polyester) with starch powders as polymer blends and study the effects of irradiation by UV-acceleration on mechanical properties of its. The unsaturated polyester was mixing by starch powders at particle size less than (45 μm) at selected weight fraction of (0, 0.5, 1, 1.5, 2, 2.5 and 3%). These properties involve ultimate tensile strength, modulus of elasticity, elongation percentage, flexural modulus, flexural strength, fracture toughness, impact strength and hardness. The results illustrate decrease in the ultimate tensile strength at and elongation percentage, while increasing modulus of elasticity, with increasing the weight ratio of starch powder to 3 % weight fraction, whereas the maximum value of hardness and flexural, impact properties happened at 1 % weight fraction for types of polymer blends.

Listing 1 - 3 of 3
Sort by
Narrow your search

Resource type

article (3)


Language

English (1)


Year
From To Submit

2018 (3)