Motor termostat contasında meydana gelen kalıcı şekil değişikliklerinin deneysel olarak incelenmesi
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Date
2019
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Bursa Uludağ Üniversitesi
Abstract
Bu çalışmada, araç motor termostatlarında kullanılan farklı malzeme özellikleri ile üretilen contaların kalıcı şekil değişimlerinin araştırılması ve incelenen malzemeler arasında en iyi olanın ortaya çıkarılması amaçlanmıştır. İncelenen problem, üretilen contaların kalıcı deformasyon oranının yüksek olmasıdır. Bu durum kullanılan EPDM kauçuğun uygun üretim parametrelere göre üretilmediğini göstermiştir. Uygun parametreyi bulmak için ASTM D395 testi uygulanmasına karar verilmiştir. Numune olarak X,A,B,C grubu olarak tanımlanmış dört tane kauçuk grubu kullanılmıştır. Bu gruplardan X sülfür diğerleri peroksit vulkanizasyonu ile üretilmiştir. Hazırlanan numuneler teste tabi tutulduğunda peroksitle vulkanize edilmiş numunelerin, sülfürle vulkanize edilmiş numunelere göre daha dayanıklı olduğu görülmüştür. Test sonucuna göre kauçuğun üretiminde vulkanizasyon sistemi değiştirilerek peroksitli vulkanize kauçuk türü kullanılmaya başlanmıştır.
The aim of this research is to investigate permanent shape deformations of seals produced by different material properties using in the vehicle engine thermostats and to find out the best one among the investigated materials. Considering problem, the seals produced have high permanent shape deformation rate. This has been indicated that the EPDM rubber used was not produced due to necessary production conditions. Application of the ASTM D395 test has been decided to find out the best production conditions. Four different types of rubber, which were called as X, A, B, C, have been used as a sample. In these types, X was produced by the sulphur vulcanisation and others produced by the peroxide vulcanisation. When the samples prepared was tested, the samples, which were produced by the peroxide vulcanisation, were the long lasting as compared with the samples, which were produced by sulphur vulcanised. Due to result of these tests, the vulcanisation system has changed in the rubber production and then the rubber type with peroxide vulcanisation has begun to be used.
The aim of this research is to investigate permanent shape deformations of seals produced by different material properties using in the vehicle engine thermostats and to find out the best one among the investigated materials. Considering problem, the seals produced have high permanent shape deformation rate. This has been indicated that the EPDM rubber used was not produced due to necessary production conditions. Application of the ASTM D395 test has been decided to find out the best production conditions. Four different types of rubber, which were called as X, A, B, C, have been used as a sample. In these types, X was produced by the sulphur vulcanisation and others produced by the peroxide vulcanisation. When the samples prepared was tested, the samples, which were produced by the peroxide vulcanisation, were the long lasting as compared with the samples, which were produced by sulphur vulcanised. Due to result of these tests, the vulcanisation system has changed in the rubber production and then the rubber type with peroxide vulcanisation has begun to be used.
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Keywords
Elastomer, Kauçuk, Kalıcı şekil değişikliği, Yaşlandırma, EPDM, Elastomer, Rubber, Aging, Relaxation, Vulcanisation, Sulphur vulcanization
Citation
Yıldız, R. (2019). Motor termostat contasında meydana gelen kalıcı şekil değişikliklerinin deneysel olarak incelenmesi. Yayınlanmamış yüksek lisans tezi. Bursa Uludağ Üniversitesi Fen Bilimleri Enstitüsü.