IMIDE OLIGOMERS AND CO-OLIGOMERS CONTAINING PENDENT PHENYLETHYNYL GROUPS AND POLYMERS THEREFROM
摘要
<p>Controlled molecular weight imide oligomers and co-oligomers containing pendent phenylethynyl groups (PEPIs) and endcapped with nonreactive or phenylethynyl groups have been prepared by the cyclodehydration of the precursor amide acid oligomers or co-oligomers containing pendent phenylethynyl groups and endcapped with nonreactive or phenylethynyl groups. The amine terminated amide acid oligomers or co-oligomers are prepared from the reaction of dianhydride(s) with an excess of diamine(s) and diamine containing pendent phenylethynyl groups and subsequently endcapped with a phenylethynyl phthalic anhydride or monofunctional anhydride. The anhydride terminated amide acid oligomers and co-oligomers are prepared from the reaction of diamine(s) and diamine containing pendent phenylethynyl group(s) with an excess of dianhydride(s) and subsequently endcapped with a phenylethynyl amine or monofunctional amine. The polymerizations are carried out in polar aprotic solvents such as under nitrogen at room temperature. The amide acid oligomers or co-oligomers are subsequently cyclodehydrated to the corresponding imide oligomers. The polymers and copolymers prepared from these materials exhibit a unique and unexpected combination of properties.</p>
申请公布号
EP0842212(A1)
申请公布日期
1998.05.20
申请号
EP19960928021
申请日期
1996.08.02
申请人
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
发明人
CONNELL, JOHN, W.;HERGENROTHER, PAUL, M.;SMITH, JOSEPH, G., JR.