发明名称 |
IMIDOLIGOMERE UND COOLIGOMERE MIT PHENYLETHYNYLEN SEITENGRUPPEN UND DEREN POLYMERE |
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 |
DE69634359(D1) |
申请公布日期 |
2005.03.24 |
申请号 |
DE1996634359 |
申请日期 |
1996.08.02 |
申请人 |
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, WASHINGTON |
发明人 |
CONNELL, W.;HERGENROTHER, M.;SMITH, G. |
分类号 |
C08J5/18;B32B27/34;C07C217/90;C07C225/22;C08G73/10;C09J179/08;(IPC1-7):C08G69/26;B32B27/06;B32B9/04;C08L79/04;B32B27/00 |
主分类号 |
C08J5/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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