| 摘要 |
<p>Polyamides comprising recurring units
<CHEM>
wherein A and B are divalent radicals, except that B can represent a single bond; R and R<1> are each hydrogen, alkyl, aryl, alkaryl or aralkyl; and c = 0 or 1; and wherein, when c is one, at least one of A and B is a substituted-quaterphenylene radical
<CHEM>
where each U is a substituent other than hydrogen, each W is hydrogen or other substituent, each p = 1 - 3, each X is hydrogen or another substituent and each r = 1 - 4, the U, Wp and Xr substitution providing the radical with a non-coplanar molecular configuration; and wherein, when c is zero, A is a substituted-quaterphenylene radical.
<??>The polyamides exhibit solubility in select (e.g. non-amide type) solvents and have high electron density substantially cylindrically distributed about their long axis. The molecularly oriented polymers are optically uniaxial and are useful e.g. in optical filter devices. </p> |
