Poly(arylene ether)s are an important class of engineering thermoplastics. They may be amorphous or crystalline materials depending upon the linking agents between the repeat units and the orientation of the aromatic rings. We have become interested in an alternate repeat unit within this general class of poly(arylene ether) systems. The monomers based upon phenylphosphine oxide linking units can sufficiently activate aromatic fluorides to nucleophilic displacement in high yields which is suitable for step growth (polycondensation) polymerizations. Thus, homogeneous aromatic nucleophilic substitution processes using difluorotriphenyl phosphine oxide in conjunction with highly purified bisphenols such as bisphenol-A, hydroquinone and biphenol have been studied. High molecular weight high glass transition temperature amorphous materials have been generated which are excellent film forming and useful molding materials. Dynamic mechanical behavior and thermal analysis (DSC,TGA) have been used to characterize materials along with spectroscopy. Results suggest that materials are completely linear with glass temperatures analogous to corresponding poly(ether sulfone)s. The introduction or aryl phosphorous linkages in the repeat unit suggest that the materials would be of interest in flame resistant applications.
|Number of pages||7|
|Journal||International SAMPE Symposium and Exhibition (Proceedings)|
|State||Published - 1989|
|Event||3rd International SAMPE Electronics Conference: Electronic Materials and Processes - Los Angeles, CA, USA|
Duration: Jun 20 1989 → Jun 22 1989