img
Investigating mechanical, thermal, and flammability properties of thermoplastic polyurethane/carbon nanotube composites      
Yazarlar
Doç. Dr. Yasin KANBUR
Karabük Üniversitesi, Türkiye
Ümit Tayfun
Türkiye
Özet
Thermoplastic polyurethane (TPU) composites containing carbon nanotube (CNT) with the loading ratios from 0.5wt% to 2 wt% were prepared using melt-compounding process. Surfaces of the CNT particles were treated with sulfuric acid/nitric acid to purify CNT and to achieve compatible surface characteristics between TPU matrix and CNT. Mechanical, thermal, flame retardant, melt flow, and morphological properties of TPU/CNT composites were investigated. Addition of CNT to TPU matrix causes in a prominent increase in tensile strength, percentage of elongation at break, and tensile modulus values of TPU. The mechanical properties are improved for lower modified CNT loadings. CNT inclusions also improve the thermal stability of pristine TPU. Addition of CNT into TPU matrix causes increase in melting and decomposition temperatures of TPU and decrease in glass transition temperature. The flammability parameters of TPU also shift to higher values after CNT loadings to matrix. Modified CNT additions at higher concentrations exhibit better fire performance. Additions of modified CNT and pristine CNT show different trends in the case of melt flow rate values. Modified CNTs disperse more homogeneously relative to pristine ones into TPU matrix which is due to improvement in interfacial interactions between CNT and TPU.
Anahtar Kelimeler
Thermoplastic polyurethane,carbon nanotubes,extrusion,flame retardancy,nanocomposites
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Journal of Thermoplastic Composite Materials
Dergi ISSN 0892-7057
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce
Basım Tarihi 12-2018
Cilt No 31
Sayı 12
Sayfalar 1661 / 1675
Doi Numarası 10.1177/0892705717743292
Makale Linki http://journals.sagepub.com/doi/10.1177/0892705717743292