Improve the impact resistance of UHMWPE sheet

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2014-12-12

UHMWPE sheet has a very high impact resistance. When the impact strength UHMWPE sheet and its molecular weight about, a molecular weight of less than 2,000,000, along with molecular weight increase, increased impact strength, around 2,000,000 reaches a peak, then after the peak, the molecular weight and then increased but the impact strength will decrease. This is because when the molecular chain is very hindered its optical crystal effect, so that there is a large region in the amorphous macromolecule which can absorb a large impact energy. According to the literature, the impact strength of UHMWPE and other plastics according to ASTM-D256 method for determining from the comparison drawn: UHMWPE sheet at room temperature impact resistance, impact resistance can be divided into the known polycarbonate comparable application in common engineering plastics. UHMWPE even with low temperatures below -40oC, there is still ridiculed impact resistance, even at liquid-gas -269oC temperature, can still maintain a good impact resistance, excellent low temperature properties which make ultrahigh molecular weight polyethylene, low-temperature applications to the engineering field.

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