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Preparation And Characterization of Thermoplastic Polyurethane Nanocomposites and Their Hybrid Composites

Oluşturulma Tarihi: 23-05-2017

Niteleme Bilgileri

Tür: Tez

Alt Tür: Yüksek Lisans Tezi

Yayınlanma Durumu: Yayınlanmamış

Dosya Biçimi: PDF

Dil: İngilizce

Konu(lar): Kimya, Mühendislik (Genel). İnşaat mühendisliği (General),

Yazar(lar): Mohammed, Salma A. Taher (Yazar),

Emeği Geçen(ler): Tirkeş, Seha (Danışman),

Anahtar Kelimeler

polyurethane, polyhedral oligomeric silsesquioxane, halloysite, polymer composites, hybrid composites


Özet

The improvement of physical properties of thermoplastic polyurethane (TPU) is still great interest of scientists due to the possible wide application areas. In this study, polyurethane matrix was reinforced with polyhedral oligomeric silsesquioxane (POSS), halloysites nanotubes (HNT) and in hybrid form. The preparation of composites were carried out using co-rotating twin-screw micro-compounder at 210 oC and the test samples were prepared by laboratory scale injection-molding device.The weight percentages compositions of added fillers for TPU/POSS and TPU/HNT nanocomposites were 0.5%, 1.0%, 1.5%, and 2.0% respectively. As for TPU/POSS-HNT hybrid composites the weight percentages were (0.5%, 0.5%), (1.0%, 1.0%), (0.5%, 1.5%), (1.5%, 0.5%) respectively. The characterizations of obtained composites were examined via tensile test, impact test, melt flow index test, hardness test, dynamic mechanical analysis and scanning electron microscopy methods.vThe obtained results showed that the best value of tensile strength was obtained for the lowest HNT content of 0.5%. For the impact test, the maximum impact strength was achieved when the POSS value was 0.5%. POSS nanoparticles are homogeneously dispersed in TPU matrix for the lowest loading (0.5%). Further additions of POSS cause formation of agglomerations. HNT and POSS nanoparticles seem to be well mixed in micro image of TPU/ 0.5% POSS 0.5%HNT hybrid composites. Homogeneity of their mixing in TPU matrix decreases as the concentrations of POSS and HNT increase, which were revealed by scanning electron microscopy.


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