Morphology trapping and materials suitable for use therewith
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United States of America Patent
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May 11, 2004
Grant Date -
Nov 13, 2003
app pub date -
Dec 9, 2002
filing date -
Jun 13, 2000
priority date (Note) -
Expired
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Abstract
This invention is directed to a process for the rapid in-situ curing of polymerizable materials to provide macro-molecular networks and articles of manufacture that are 'morphology-trapped'; that is, they exhibit a fixed phase morphology and/or molecular orientation that is locked in by the curing step. The process includes the steps of mixing together a dead polymer or a prepolymer, a reactive plasticizer or a diulent, and an initiator to give a polymerizable composition; further processing the mixture in order to achieve a desired phase morphology and/or moelcular orientation of the polymeric constitutents; shaping the polymerizable composition into a desired geometry; and exposing the polymerizable composition to a source of polymerizing energy, without mixing to give a final product with the desired phase morphology and/or moelcular orientation locked in place. The phase morphlogy and molecular orientation present just prior to cure of the polymerizable composition is subsequently trapped or locked in place by the curing step to that further changes in morphology are hindered or prevented.
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