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Evaluation of thermal and physical properties of boron compound reinforced high density polyethylene(HDPE)

Evaluation of thermal and physical properties of boron compound reinforced high density polyethylene(HDPE)

Name:
Noom Graham

Department:
Material Science and Engineering

Abstract:
The objectives of this study is to investigate the physical and thermal properties of the multifunctional composites used for radiation shielding. Two compound of Boron namely boron carbide(BC) and boron nitride(BN) were added to the high-density polyethylene (HDPE) into double helical screw mixer at 125oC-150 oC. The HDPE/BC and HDPE/BN mixture was then cooled to the room temperature followed by reheating of the samples into the pre-prepared aluminum mold to obtain the require shape and size for the experiments. Dynamic mechanical analysis (DMA) shows that inclusion of BN increases the storage modulus due to its high stiffness while BC reduces the modulus due to its lubricating effect. However opposite behavior was observed from the differential scanning calorimetry (DSC) results BC increases the glass transition temperature while no change was observed with the inclusion of BN which suggest that BC is restricting the polymer chain movement at glass transition temperature temperature. AFM imaging showed that boron carbide forms the agglomeration at 7 wt.% while less agglomeration was showed in HDPE/BN.