My Dotrong - Beavercreek OH Minhhoa Dotrong - Beavercreek OH Robert C. Evers - Dayton OH
Assignee:
The United States of America as represented by the Secretary of the Air Force - Washington DC
International Classification:
C08G 63133
US Classification:
528184
Abstract:
High compressive strength, three-dimensional para-oriented benzobisoxazole polymers of the formula: ##STR1## wherein Q is ##STR2## and wherein Z represents repeating units of the formula: ##STR3##.
My Dotrong - Beavercreek OH Minhhoa Dotrong - Beavercreek OH Robert C. Evers - Dayton OH
Assignee:
The United States of America as represented by the Secretary of the Air Force - Washington DC
International Classification:
C08G 6400
US Classification:
528370
Abstract:
A two-dimensional, rigid-rod polymer of the formula: ##STR1## wherein x, y and z each has a value of 5 to 40; wherein the sum of x, y and z is about 20 to 100; and wherein PBX is a repeating group of the formula: ##STR2## is prepared by the polycondensation of trimeric acid (TMA) ##STR3## with 4-[5-amino-6-hydroxybenzoxazol-2-yl]benzoic acid (ABA) ##STR4## in polyphosphoric acid (PPA).
Isbn (Books And Publications)
Macromolecules Containing Metal and Metal-Like Elements: Biomedical Applications