Influences of aminosilanization of halloysite nanotubes on the mechanical properties of polyamide-6 nanocomposites

Erdogan A. R., Kaygusuz I., KAYNAK C.

POLYMER COMPOSITES, cilt.35, sa.7, ss.1350-1361, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 35 Sayı: 7
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1002/pc.22787
  • Dergi Adı: POLYMER COMPOSITES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1350-1361
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

The main purpose of this study was to explore effects of silanization of halloysite nanotubes (HNT) on the mechanical properties of polyamide 6 by using aminopropyltriethoxysilane. Effects of two silanization parameters; initial silane concentration and pH of reaction solution were also investigated. Nanocomposites were compounded via melt mixing method in a twin-screw extruder, while specimens were shaped by injection molding. Formation of aminosilane molecules on the edges and defected surfaces of HNTs were revealed mainly by Fourier-Transform infrared spectroscopy. Scanning electron microscopy and mechanical tests indicated that even the use of unmodified HNTs could be homogenously distributed in the matrix leading to increased mechanical properties as much as more than 30%. Aminosilanization of HNTs with optimum silanization parameters resulted in effective amounts of AlOSi bridging bonds between the matrix and reinforcement, making composite strengthening mechanisms more operative. In this condition, increases in the mechanical properties were as much as more than 50%. POLYM. COMPOS., 35:1350-1361, 2014. (c) 2013 Society of Plastics Engineers