Aromatic polyimides have been used extensively ... As the most relevant tetracarboxylic dianhydride, 5,5′-(1,1,3,3,5,5-hexamethyltrisiloxane-1,5-diyl)bisbicyclo[2.2.1]heptane-2,3-endo ...

These features contribute to aromatic polyimides becoming the resin ... The first step takes a dianhydride, such as benzophenone tetracarboxylic dianhydride (BTDA ®), and reacts it with a diamine ...