کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5206955 | 1382328 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Material PropertiesNanoindentation behaviour of layered silicate filled spent polyamide-12 nanocomposites Material PropertiesNanoindentation behaviour of layered silicate filled spent polyamide-12 nanocomposites](/preview/png/5206955.png)
This paper deals with the nanoindentation behaviour of spent polyamide-12 and spent polyamide-12/layered silicate filled nanocomposites. Layered silicates at 1Â wt.%, 3Â wt.% and 5Â wt.% were used as filler in spent polyamide-12 and the nanocomposites were prepared by using a single screw injection moulding technique. The interlayer d-spacing, interlamellar structure and surface morphology were investigated by wide angle x-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM), respectively. The effect of various concentrations of layered silicate reinforcement on the nanomechanical properties was investigated by a nanoindentation test method. The nanohardness increased from 0.156Â GPa for neat spent PA-12 up to 0.338Â GPa for 5Â wt.% spent PA-12/nanocomposite. Similarly, reduced modulus of neat spent PA-12 increased by 73% with the incorporation of 5Â wt.% layered silicate. Different levels of nanofiller dispersion characterised using XRD and TEM correlated strongly with improvements in nanohardness properties. The much improved nanohardness and modulus values are related to the intercalated and exfoliated structure of spent PA-12/nanocomposites. The reutilisation of spent materials such as spent PA-12 has great potential for economic and environmental benefits.
Journal: Polymer Testing - Volume 30, Issue 6, September 2011, Pages 688-692