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Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic polyethylene. 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 . [ 1 ]
UHMWPE is polyethylene with a molecular weight numbering in the millions, usually between 3.5 and 7.5 million amu. [25] The high molecular weight makes it a very tough material, but results in less efficient packing of the chains into the crystal structure as evidenced by densities of less than high-density polyethylene (for example, 0.930–0. ...
The acronym IPX-UHMW-PE stands for Interstate Plastics eXtra ultra-high-molecular-weight polyethylene. [3] IPX 2000 UHMW is naturally red in color, and not approved for direct food contact like virgin UHMW. [4] IPX maintains a high resistance to corrosive chemicals except oxidizing acids; and offers even lower moisture absorption and a lower ...
It is resistant to moisture and most of the chemicals. It is flexible at room temperature (and low temperature) and can be heat sealed. Since it is an inexpensive plastic it is made in large amounts to cater to the demand. For example: ultra-high-molecular-weight polyethylene (UHMWPE) is tough and resistant to chemicals. It is used to ...
Synthetic base oil (by far the most used one): industrial and automotive lubricants. [ 12 ] Polyolefins are used for blow moulded or rotationally moulded components, e.g. toys, [ 13 ] for heat-shrink tubing used to mechanically and electrically protect connections in electronics, [ 13 ] and for rash guards or undergarments for wetsuits.
For example, polyethylene (PE) is a cheap, low friction polymer commonly used to make disposable bags for shopping and trash, and is considered a commodity plastic, whereas medium-density polyethylene (MDPE) is used for underground gas and water pipes, and another variety called ultra-high-molecular-weight polyethylene (UHMWPE) is an ...
The high solvent retention allows for ultra-high drawing as with ultra high molecular weight polyethylene (UHMWPE) (e.g., Spectra ®) to produce fibers with a high degree of orientation, which increases fiber strength. The fibers are first cooled either with air or in a liquid bath to induce gelation, then the solvent is removed through ageing ...
Such testing is important in determining the expected service-life of plastic items as well as the fate of waste plastic. In natural weather testing, polymer samples are directly exposed to open weather for a continuous period of time, [ 54 ] while accelerated weather testing uses a specialized test chamber which simulates weathering by sending ...