2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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TechConnect Summit
Clean Technology 2008

POSS/polyamide 12 nanocomposites

X. Bao, C. Wan, F. Zhao
Loughborough University, UK

polyamide, POSS, crystallinity, physical properties

Polyamide 12/TriSilanolPhenyl-POSS (PA12/POSS) nanocomposites were prepared via melt-compounding. The effect of POSS on crystalline structure and crystalline transition of PA12 was investigated by wide-angle X-ray diffraction (WAXD) and real time Fourier transform infrared spectroscopy (FTIR) for the first time. PA12 was found to crystallize into gamma form as slowly cooling from melt, as indicated by WAXD. The presence of POSS did not influence the crystalline structure of PA12. All the samples underwent Brill transitions as heating from room temperature to melt point. An absorption band at 697cm-1 ascribed to Amide V (alph) mode emerged combined with the Amide VI (gamma) band at 628cm-1 disappeared with temperature increasing both for PA12 and PA12/POSS composites, which suggested that the gamma form crystalline has transformed into alph form. The Brill bands were identified and the transformed mechanism was discussed based on the real FTIR results. The tensile properties, melt viscosity and thermal stability of PA12 were enhanced by addition of POSS probably due to the chain extension reaction between PA12 and POSS.

Nanotech 2008 Conference Program Abstract