Tek ve Hibrit Olarak Tarımsal Atık Takviyelendirici Dolguların Polipropilenin Mekanik ve Isıl Özellikleri Üzerindeki Etkileri

Year 2019, Volume: 21 Issue: 62, 395 - 408, 21.05.2019

Kutlay Sever Yasar Aycan

https://doi.org/10.21205/deufmd.2019216207

Abstract

Tarımsal hasatlardan ve budamadan sonra, Dünya'da milyarlarca ton tarımsal atık meydana gelir. Yalnızca az miktarda tarımsal atık gübre ve yakıt olarak kullanılmaktadır ve geri kalanı değerlendirilmemektedir. Kalan atık, sahada yakıldığında hava kirliliğine neden olabilir. Bu nedenle, bu büyük miktarda atık, polimerik kompozit ürünler üretmek için bir takviye veya dolgu malzemesi olarak kullanılabilir. Son on yılda, doğal elyaf/polimer kompozitlerin gelişimi çevre dostu karakteristikleri, düşük maliyet, düşük yoğunluk vb. nedeniyle zemin kaplaması, dış cephe kaplaması ve otomotiv iç parçaları gibi birçok uygulamada popülerlik kazanmıştır. Bu çalışmada, polipropilen (PP) esaslı kompozitlerde doğal takviyelendirici dolgu malzemeleri olarak pirinç kabuğu (RH) ve asma çubuğu’nun etkin kullanımı değerlendirilmiştir. Bu çalışmada, kompozitlerin mekanik (çekme ve eğilme dayanımları ve Young’s ve eğilme modülleri) ve termal (bozunma, erime ve kristalleşme sıcaklıkları vb.) özelliklerini incelemek için farklı ağırlık oranlarda RH (% 10,% 20 ve% 30) içeren RH-PP kompozitler ve hibrit RH-VS-PP matris kompozitler üretilmiştir. RH-PP ve RH-VS-PP kompozitler, saf PP'ye kıyasla çok daha iyi mekanik ve termal özellikler sergilemiştir. RH-PP ve RH-VS-PP kompozitleri, maksimum bozulma sıcaklığının daha yüksek bir bozunma sıcaklığına yer değiştirmesiyle termal stabilitesinde bir artış göstermiştir. RH-PP kompozitlere kıyasla, RH’ın VS’ye oranı 3: 7 olduğunda, RH-VS-PP kompozitleri daha iyi eğilme özellikleri sunmuştur.

Keywords

Pirinç kabuğu, asma çubuğu, polipropilen, hibrit

The Effects of Agro-Waste Reinforcing Fillers as Single and Hybrid on Mechanical and Thermal Properties of Polypropylene

Abstract

After agricultural harvests and pruning, billions
of tons of agro-wastes are occurred on Earth. Only a small amount of the
agro-waste is used as fertilizer and fuel and the rest is not evaluated. The
remaining waste can cause air pollution if it is burned in the field. For this
reason, this large amount of waste can be used as a reinforcement or filler to
produce polymeric composite products. In last decade, the development of
natural fiber/polymer composites has gained popularity in many applications
such as decking, siding, and automotive indoor parts due to their environment
friendly characteristics, low cost, low density etc. In this study, the
effective utilization of rice husk (RH) and vine stem (VS) as natural
reinforcing fillers in polypropylene (PP) based composites was evaluated. PP
matrix composites containing different weight fraction of RH  (10%, 20% and 30 %) and hybrid RH-VS-PP
matrix composites were manufactured to observe the mechanical (tensile and
flexural strengths, and Young’s and flexural moduli) and thermal (degradation,
melting, and crystallization temperatures etc.) properties of the composites. The
RH-PP and RH-VS-PP composites exhibited much better mechanical and thermal
properties compared to neat PP. RH-PP and RH-VS-PP composites showed an
increase in thermal stability, which is indicated by shifting in maximum
degradation temperature to a higher degradation temperature. Compared to RH-PP
composites, the RH-VS-PP composites offered better flexural properties when the
ratio of rice husk to vine stem was 3:7.

Keywords

Rice husk, vine stem, polypropylene, hybrid

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