High-temperature polymer polyimide

The use of adhesives can be traced back many centuries, while the production of adhesives, on an industrial scale, started about 300 years ago. The birth of modern structural adhesives can be dated from about 1910, with the introduction of the phenol-formaldehyde resins.Table II summarizes the historical development of structural adhesives, with the dates referring to the approximate time period during which each adhesive became commercially available. The introduction dates for the high-temperature polymers (polyimide, polybenzimidazole, and polyquinoxa-line) have been included for reference, although, as previously mentioned, there are presently few commercial products based on these polymers. 

The dianhydride of 1,4,5,8-naphthalene tetracarboxyhc acid [81-30-1] has been of research interest for the preparation of high temperature polymers, ie, polyimides. The condensation of the dianhydride with o-phenylenediamines gives vat dyes and pigments of the benzimidazole type. 

POLYIMIDES AND OTHER HIGH-TEMPERATURE POLYMERS 5.2.2.3 Dielectric Properties and Moisture Uptake... 

P. M. Hergenrother, in Polyimides and Other High Temperature Polymers, M. Abadie and B. Sillion (Eds.), Elsevier, Amsterdam, 1991, p. 1. 

Solid state NMR has been used to study polymers of various classes over the past several years. In particular, the technique has been used to study curing reactions in epoxies (12). polyimides (1), and acetylenic terminated sulfones (13). The ability to observe the evolution of the carbons of the reacting species has been clearly shown to provide valuable information which has been difficult or impossible to obtain with other techniques. The use of 13C solid state NMR techniques is essential for the understanding of curing reactions in high temperature polymers in order to be able to correlate the reaction chemistry with the structural and resulting physical properties. 

St. Clair TL (1987) Proc of the interdisciplinary symposium on recent advances in polyimides and other high temperature polymers. Sponsored by ACS Polymer Div, Reno, NV, July... 

Pater RH (1990) Proc of the Interdisciplinary Symposium on Recent Advances in Polyimides and Other High Temperature Polymers, sponsored by ACS Polymer Div, San Diego, January... 

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