Study of the thermal, mechanical properties and lifetime of PVC polymer

العناوين الأخرى

دراسة الصفا الحرارية و الميكانيكية و عمر الأداء لبوليمر PVC

مقدم أطروحة جامعية

Ahmad, Suhaib Sabah

مشرف أطروحة جامعية

Thijil, Muhammad Abd al-Nabi
Jasim, Widad Hamdi

أعضاء اللجنة

al-Dabbagh, Balqis Muhammad Diya
Laibi, Suad H.
Jabr, Zaynab A.

الجامعة

جامعة بغداد

الكلية

كلية التربية للعلوم الصرفة-ابن الهيثم

القسم الأكاديمي

قسم الفيزياء

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2015

الملخص الإنجليزي

In this work, mechanical behavior of PVC product like pipes with different origins (K.S.A and Egypt) and Turkey doors with different manufacturing (Nova and Firat) which are used in Iraqi markets were studied.

The objective of this work was to study the mechanical properties like ultimate tensile strength, Young's modulus, elongation at Max., elongation at break, impact strength, flexural strength and hardness of the pipes and doors.

The experimental results show that K.S.A pipes exhibited maximum ultimate tensile strength and Young's modulus than that the Egypt pipes.

However, the Egypt pipes exhibited maximum elongation at Max.

and elongation at break when compared with K.S.A pipes.

All the tensile properties of Firat doors are greater than that of Nova doors.

Comparison of the flexural strength of pipes and doors.

The pipes have the same flexural strength but the Firat doors have maximum value than Nova doors.

Egypt pipes have a higher impact strength than K.S.A pipes.

While the Firat doors have a higher impact strength than Nova doors.

The experimental results of hardness Shore D indicated that K.S.A pipes exhibited maximum hardness number (83.7) than Egypt one, while the Firat and Nova doors have the same values.

In this study, thermal properties of Firat and Nova have been evaluated, firstly by thermal conductivity and second by thermal stability and degradation.

The Firat doors have better thermal conductivity than that of Nova doors.

From the thermogravimetric analysis at different heating rates (2, 5, 10, 20 and 40 °C/min).

The Firat doors have a higher thermal stability than Nova one.

The Egypt pipes exhibited more thermal stability than the K.S.A pipes From the TGA curves the activation energy of pipes and doors are determined at different conversion levels.

At 30% conversion level when the mechanism of degradation would be stable and the value of activation energy of Egypt pipes and Firat doors is (108.35 KJ/mole) when it is (101.39 KJ/mole) for K.S.A pipes and (98.35 KJ/mole) for Nova doors.

Thermogravimetric analysis (TGA) provides a method for accelerating the lifetime testing of polymers so that short-term experiments can be used to predict in use lifetime.

The lifetime is decreased with increase of the temperature, at fixed temperature like 70 °C the lifetime of Egypt pipes is (≈100 years) while lifetime of K.S.A pipes is (≈21 years).

At the same temperature (70 °C) the lifetime of Firat doors is (≈72 years) while the lifetime of Nova doors is (≈21 years).

Thermomechanical analysis (TMA) test showed the glass transition temperature (Tg) and softening point (Ts) for pipes and doors.

The K.S.A pipes have value for Tg and Ts higher than that of Egypt pipes, while the Firat and Nova doors have the same values.

التخصصات الرئيسية

الفيزياء

عدد الصفحات

83

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-737742