Acetylenic heterocyclic nonlinear optical thermoset monomers
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsBruce A. Reinhardt, Jayprakash C. Bhatt
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Abstract
The compound 2-ethynyl-5-(4-pyridyl)ethynyl thiophene: ##STR1## when incorporated into a thermoplastic polymer having repeating units of the formula: ##STR2## wherein X is --O-- or --S--, and R is selected from the group consisting of: ##STR3## and Ar is selected from the group consisting of: ##STR4## wherein X is as previously defined, poled to align the molecules and cured to crosslink at least the terminal acetylenic groups, has second-order nonlinear optical activity.
Claims5
A composite film with second-order nonlinear optical activity consisting essentially of about 5 to 30 weight percent 2-ethynyl-5-(4-pyridyl)ethynyl thiophene, and a high performance thermoplastic polymer having repeating units of the formula:
- ##STR12## wherein X is --O-- or --S--, and R is selected from the group consisting of:
- ##STR13## and Ar is selected from the group consisting of:
- ##STR14## wherein X is as previously defined and said weight percent of 2-ethynyl-5-(4-pyridyl)ethynyl thiophene is based on the weight of the thermoplastic polymer.
Dependencies are inferred from the claim text.