Mechanical and physical of rubber compost

العناوين الأخرى

الخصائص الميكانيكية و الفيزيائية للمطاط المركب

مقدم أطروحة جامعية

al-Mamuri, Muhammad H. D.

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم العلوم التطبيقية

دولة الجامعة

العراق

الدرجة العلمية

دكتوراه

تاريخ الدرجة العلمية

2006

الملخص الإنجليزي

This research project deals with preparing and studying rubber composite materials used in automobile's part which is' called engine mounting.

In this work samples are prepared from original shock absorbers supplied by Osaka Company to study its mechanical properties as shown below : For comparison with the original samples, recipe NO.

laws prepared and then developed with reinforcement by Novolac, silica, carbon and fiber.

The mechanical properties compared with original properties above.

Reinforcement technique -with copolymer matrix Elastomer (Nitnie butadiene rubber), and thermosetting resin (novolac) as follows : 1) Nitnie butadiene rubber (NBR) is added with 50-98 % as shock and vibration absorber for the new composite material.

2) Addition of novolac resin (0-48 %) it gives a good mechanical and thermal properties which are the principal reason for its uses for the new composite material (engine mounting).

At 8 % elastic modulus, flexibility, deformation and impact are 2.19MPa, 13678 cycle, 2.4 mm, 63 % respectively.

3) Addition of filler is focused on using extracted silica from rice husk ash (RHA) for several benefits.

4) Different sizes of silica (25-355) pm are added in 20 % to the blend recipe (item 3) At particle 38pm, elastic modulus, flexibility, deformation and impact are 5MPa, 8992 cycle, 2.29mm, and 63.5 % respectively.

5) Silica Particles in size 35pm are added to the blend recipe in different weight percent (0-70) the best result is obtained with 40 % silica.

Then elastic modulus, flexibility, deformation and impact are 5MPa, 3661 cycle, 1.25 mm, 55 % respectively.

6) With addition of carbon black type (330) on the expense of silica percent in a balance of 40 % (carbon +silica) we get the best mechanical properties ratio with 20 % carbon +20 % silica The elastic modulus, flexibility, deformation and impact are 5MPa, 6765 cycle, 1.5 mm and 62 % respectively which are agree with that of the original samples from Osaka company.

7) The best recipe item (6) is (50NBR +8 % novolac +20 % SiO2 +20 % carbons) then nylon6.6 is used as reinforcement in different volume fraction (0-8 %) and different fiber orientation .The mechanical properties at volume fraction (1 %) and in zero direction in which, tensile is (9 MPa) and hardness is(75 1RHD).

The best type of the rubber composite is selected according to the rubber mechanical and physical properties .Tests is carried out on all types of recipes.

Some factors affecting the final product in item (6) such as aging, swelling by oils and fuels and ultraviolet are studied.

The mechanical test are carried out by using tcnsomeicr lot tensile, hardness and impact by special equipment's, while physical tests such as specific gravity and torque by using Ergometer.

The theoretical analyses arc used to study some parameters which can't be done in laboratory such as stress and strain in engine mounting at static and dynamic loading and deformation by using ANSYS 5.4 program analysis.

The result shows the modified type of rubber composite properties agree with that of the original type and the mechanical properties increase in general.

Cost calculation shows there is a reduction in the cost of the new sample by about 65 % from that of the original part besides its good properties.

التخصصات الرئيسية

الكيمياء

الموضوعات

• الخواص الفيزيائية
• الخواص الميكانيكية

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-305549