反应 #1869146

反应方程式

PMDA

4-ABA

→

PMDA 4-ABA

溶剂

NMP

NMP

反应条件

后处理

1. 1
   其他to prepare a polyamic acid solution
2. 2
   其他The polymerization reaction
3. 3
   其他uniformly, and the molecular weights were measured in the same manner as in Preparation Example 1 and as a result
4. 4
   其他a weight average molecular weight of 12,695 was obtained
5. 5
   浓缩the BCS concentration
6. 6
   其他to prepare a liquid crystal aligning agent

实验过程

20.94 g (0.096 mol) of PMDA, 11.00 g (0.09 mol) of 4-ABA and 3.49 g (0.01 mol) of DAHOB were reacted in 201 g of NMP at room temperature for 5 hours to prepare a polyamic acid solution. The polymerization reaction proceeded easily and uniformly, and the molecular weights were measured in the same manner as in Preparation Example 1 and as a result, a solution of a polyamic acid having a number average molecular weight of 7,038 and a weight average molecular weight of 12,695 was obtained. Further, to this solution, poor solvents BCS and NMP were added so that the polyamic acid concentration would be 5 mass % and the BCS concentration would be 20 mass % to prepare a liquid crystal aligning agent.

来源