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Issue
Korean Journal of Chemical Engineering,
Vol.27, No.4, 1338-1342, 2010
Preparation and characteristics of nano-B4C/PVA particles and ultra high molecular weight polyethylene composites
Uhm YR, Kim J, Jung J, Rhee CK
In-situ mechanical process for preparation of the polyvinyl alcohol (PVA) coated nano-B4C powder was investigated by using a high-energy ball mill. The produced PVA coat on the surface of nano-B4C particles was observed by x-ray diffraction (XRD) and confirmed by TEM images. The average particle size of the produced nano-B4C/PVA particles was in the range of several tens to hundreds of nanometers depending on the milling conditions. The polymer composites were fabricated by hot pressing ultra high molecular weight polyethylene (UHMWPE) powder mixed with nano-B4C/PAV and micro-B4C powders, respectively. Nano-B4C/PVA dispersed UHMWPE shows slightly lower crystallinity and stiffness than micro-B4C dispersed UHMWPE based on differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) evaluations.
Keywords: PVA; B4C; Ball Mill; Nano Powder; Polymer Nanocomposite
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