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About UPE/UHMWPE

关注:147 发表时间:2018-06-19 17:17:45

Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplasticpolyethylene

Also known as high-modulus polyethylene, (HMPE), it has extremely long chains, with a molecular mass usually between 3.5 and 7.5 million amu

The longer chain serves to transfer load more effectively to the polymer backbone by strengthening intermolecular interactions. 

This results in a very tough material, with the highest impact strength of any thermoplastic presently made. 
UHMWPE is odorless, tasteless, and nontoxic. It embodies all the characteristics of high-density polyethylene (HDPE) with the added traits of being resistant to concentrated acids and alkalis, as well as numerous organic solvents. 

It is highly resistant to corrosive chemicals except oxidizing acids; has extremely low moisture absorption and a very low coefficient of friction

is self-lubricating (see boundary lubrication); and is highly resistant to abrasion, in some forms being 15 times more resistant to abrasion than carbon steel

Its coefficient of friction is significantly lower than that of nylon and acetal and is comparable to that of polytetrafluoroethylene (PTFE, Teflon), but UHMWPE has better abrasion resistance than PTFE.

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