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AssigneesThe Massachusetts Gerneral Hospital, Cambridge Polymer Group, Inc.
InventorsOrhun K. Muratoglu, Stephen H. Spiegelberg, Gareth H. McKinley
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The present invention provides an irradiated crosslinked polyethylene containing reduced free radicals, preferably containing substantially no residual free radical. Disclosed is a process of making irradiated crosslinked polyethylene by irradiating the polyethylene in contact with a sensitizing environment at an elevated temperature that is below the melting point, in order to reduce the concentration of residual free radicals to an undetectable level. A process of making irradiated crosslinked polyethylene composition having reduced free radical content, preferably containing substantially no residual free radicals, by mechanically deforming the polyethylene at a temperature that is below the melting point of the polyethylene, optionally in a sensitizing environment, is also disclosed herein.
An irradiated crosslinked polyethylene composition made by the process comprising steps of:
An irradiated crosslinked polyethylene composition made by the process comprising steps of:
An irradiated crosslinked polyethylene composition having reduced free radical content, and wherein crystallinity of the polyethylene is at least about 51%.
A method of making an irradiated crosslinked polyethylene composition comprising steps of:
A method of making an irradiated crosslinked polyethylene comprising steps of:
An irradiated crosslinked polyethylene composition made by the process comprising steps of:
A method of making an irradiated crosslinked polyethylene composition comprising steps of:
An irradiated crosslinked polyethylene composition made by the process comprising steps of:
Dependencies are inferred from the claim text.