Polipropilen/huntit kompozitlerinin mekanik, fiziksel ve morfolojik özellikleri

Yıl 2017, Cilt: 21 Sayı: 5, 1045 - 1050, 01.10.2017

Yasin Kanbur , Ümit Tayfun

https://doi.org/10.16984/saufenbilder.281035

Cited By: 3

Öz

Huntit hidromagnezit (HH) polimere eklenmeden
önce, silan bağlayıcı kullanılarak polipropilen (PP) matris ile uyumlu hale
getirilmiştir. Buna ek olarak, HH ile uyumlu olması amacıyla maleik anhidrit
aşılanmış PP (Ma-g-PP) matrisi ile de kompozitler oluşturulmuştur. Kompozit
malzemeler, sanayide en sık tercih edilen yöntem olan eriyik karıştırma metodu
ile laboratuvar ölçekli çift vidalı ekstruder kullanılarak, % 10 HH içerecek
şekilde hazırlanmıştır. Granül haline getirilen kompozitler enjeksiyonlu
kalıplama yöntemi ile şekillendirilmiştir. Hazırlanan kompozitlere sırasıyla
çekme testi, dinamik mekanik analiz (DMA) ve erime akış indisi testleri
uygulanmıştır. Numunelerin mekanik dayanımlarına ek olarak, dış hava
şartlarında kullanımını belirlemek amacıyla su emme testleri
gerçekleştirilmiştir. Ayrıca toz parçacıkların polipropilen matris içinde
dağılımını gözlemlemek amacıyla tarayıcı elektron mikroskobu (SEM)
kullanılmıştır. Sonuçlar incelendiğinde, silanlanmış HH ve Ma-g-PP kullanımı
ile elde edilen kompozitlerin mekanik özelliklerinde iyileşme gözlemlenmiştir.
SEM görüntüleri incelendiğinde, silanlama işlemine tabi tutulmuş huntit ve
Ma-g-PP kompozitlerinde huntit parçacıklarının PP matris içerisinde iyi dağılım
gösterdigi ve parçacık ile polimer yüzeylerinin uyumlu olduğunu görülmektedir.
Bu sonuç mekanik özelliklerdeki iyileşmeyi desteklemektedir. Kompozitlerin
erime akış değerlerinde belirgin bir değişme olmamıştır. Bu sonuç, PP matrisine
huntit dolgu maddesi eklenmesiyle polimerin işlenmesinde önemli bir sorunla
karşılaşılmayacağını göstermektedir.

Anahtar Kelimeler

Polipropilen, Huntit, Yüzey Modifikasyonu, Kompozit Malzemeler

Mechanical, physical and morphological properties of polypropylene/huntite composites

Öz

Huntite hydromagnesite (HH) is compatibilised
with the polypropylene (PP) matrix by using silane coupling agents before
addition to polymer.  In addition,
composites with maleic anhydride grafted polypropylene (Ma-g-PP) matrix were
prepared in order to compatible with HH. Composite materials which contain 10%
HH content were prepared by using twin screw extruder which is the most common
method in industry. Granulased composites were shaped with injection molding.
Tensile test, dynamic mechanical analysis (DMA) and melt flow index tests were
applied to composites, respectively. In addition to the mechanical properties
of prepared composites, water absorption test of the composites were performed
to consider their outdoor usage conditions. 
Scanning electron microscopy (SEM) was used to observe the dispersion of
huntite particles inside the polypropylene matrix. Mechanical properties of
composites obtained by using silanized huntite and Ma-g-PP were improved. SEM
images show that composites which contain silanized huntite and Ma-g-PP have
good dispersion of particles inside the PP matrix and particle surfaces were
compatible with polymer surface. This results also support the mechanical test
results. Distinct changes did not observed for the melt flow index results of
the composites.  This results indicate
that addition of the huntite to the PP matrix causes no obvious problem to the
processibility of the polymer.

Anahtar Kelimeler

Polypropylene, Huntite, Surface Modification, Composite Materials

Kaynakça

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