Daba → Cbda daba

Participants

Reaction Steps

19.22 g (0.098 mol) of CBDA as the tetracarboxylic dianhydride component, and 20.45 g (0.09 mol) of DABA and 2.92 g (0.01 mol) of DADOB, as the diamine component, were mixed in 230 g of GBL and reacted for 20 hours at room temperature to obtain a polyamic acid solution. The polymerization reaction proceeded easily and uniformly, and the reduced viscosity of the obtained polyamic acid was 1.48 dl/g. Further, NMP, GBL and BCS were added so that this solution comprised 4 wt % of the polyamic acid, 46 wt % of NMP, 30 wt % of GBL and 20 wt % of BCS, to obtain a liquid crystal aligning agent for comparison.

Provenance & Evidence