Investigation of UV Aging and Compatibilizer Effects on Glass Sphere Reinforced Polymer Composites

Yıl 2024, Cilt: 12 Sayı: 1, 39 - 48, 26.01.2024

Elif Ulutaş Münir Taşdemir

https://doi.org/10.29130/dubited.1184670

Öz

A study was conducted on the maleic anhydride grafted polypropylene (MAPP) ratio and the effects of UV (ultraviolet) annealing on the mechanical and morphological properties of polypropylene (PP)/glass spheres (GS) polymer composites. The UV annealing process was carried out at 70 C in three different holding times of 0, 15 and 30 days. A homogeneous mixture was obtained by mixing glass sphere particles in the polypropylene matrix at the rate of 1, 5, 10 and 15% in the extruder. The mixture obtained in the extruder was passed through the crusher to form granules, then the test samples were molded in the injection machine in accordance with the standards. The effects of MAPP and UV retention time on the elastic modulus, yield strength, tensile strength at break, % elongation, Izod impact strength, hardness, density and morphological properties of PP/glass sphere composites were investigated. MAPP and UV retention time have marginal effects on the mechanical properties of composites such as modulus of elasticity and density. The results showed that increasing MAPP content and UV retention time caused an increase in modulus of elasticity and density, whereas İzod impact strength and % elongation decreased as UV retention time increased. The MAPP content affected the thermal behavior of the composite, causing a significant increase in vicat softening temperature and heat deflection temperature-HDT values. In addition, scanning electron microscope (SEM) examination was performed to evaluate the microstructure and material distribution of the glass sphere particles in these experiments.

Anahtar Kelimeler

Mechanical properties, Polypropylene, Polymer composites, UV aging, Glass sphere

Cam Küre Takviyeli Polimer Kompozitlerde UV Yaşlandırma ve Uyumlaştırıcı Etkisinin İncelenmesi

Öz

Maleik anhidrit aşılı polipropilen (MAPP) oranı ve UV (Ultraviyole) yaşlandırma işleminin polipropilen (PP)/cam küreler (GS) polimer kompozitlerinin mekanik ve morfolojik özellikleri üzerindeki etkileri üzerine bir araştırma yapılmıştır. UV yaşlandırma, 70 C sıcaklıkta 0, 15, 30 gün olacak şekilde üç farklı bekletme süresinde gerçekleştirilmiştir. Polipropilen matris içerisine %1, 5, 10 ve 15 oranlarında katılan cam küre parçacıkları ekstrüderde karıştırılarak homojen bir karışım elde edilmiştir. Ekstrüderde elde edilen karışım kırıcıdan geçirilerek granül formuna getirilmiştir, ardından enjeksiyon makinesinde standartlara uygun şekilde test numuneleri kalıplanmıştır. MAPP ve UV tutma süresinin, PP/cam küreler kompozitlerinin elastik modülü, akma mukavemeti, kopmadaki çekme mukavemetleri, %uzama, İzod darbe mukavemeti, sertlik, yoğunluk ve morfolojik özelliklerine etkileri araştırılmıştır. MAPP ve UV tutma süresinin, kompozitlerin elastiklik modülü ve yoğunluğu gibi mekanik özellikleri üzerinde marjinal etkileri vardır. Sonuçlar, artan MAPP içeriğinin ve UV tutma süresinin elastiklik modülü ve yoğunluğunun artmasına neden olduğunu, buna karşın UV tutma süresi arttıkça İzod darbe dayanımı ve %uzamanın azaldığını göstermiştir. MAPP içeriği kompozitin termal davranışına etki ederek vicat yumuşama sıcaklığı ve ısıl çarpılma sıcaklığı-HDT değerlerinde önemli derecede artışa sebep olmuştur. Ayrıca, bu deneylerde cam küre parçacıklarının mikro yapısını ve malzeme dağılımını değerlendirmek için taramalı elektron mikroskobu (SEM) incelemesi yapılmıştır.

Anahtar Kelimeler

Mekanik özellikler, Polipropilen, Polimer kompozitler, UV yaşlandırma, Cam küre

Kaynakça

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