反应 #1702024

反应方程式

isophthalic acid

aminophenol

2-hydroxy-6-naphthoic acid

acetic anhydride

→

maleimide

maleimidobenzoic acid

benzoic acid

acetylene benzoic acid

溶剂

DMF

N,N-dimethylformamide

反应条件

后处理

1. 1
   其他Alternatively, the liquid crystalline thermoset oligomer can be prepared by a bulk polymerization process in accordance with the following procedure
2. 2
   温度to reflux for a predetermined time period
3. 3
   其他Acetic acid as a by-product and unreacted acetic anhydride are removed from the reaction mixture
4. 4
   workup.ADDITIONNext, 4-hydroxybenzoic acid is added
5. 5
   温度the reaction temperature is maintained which
6. 6
   其他the reaction
7. 7
   其他to give a liquid crystal oligomer

实验过程

Alternatively, the liquid crystalline thermoset oligomer can be prepared by a bulk polymerization process in accordance with the following procedure. In another exemplary method, isophthalic acid, aminophenol, 2-hydroxy-6-naphthoic acid and acetic anhydride are slowly heated to 150° C. with stirring in a reactor. The mixture is brought to reflux for a predetermined time period. Acetic acid as a by-product and unreacted acetic anhydride are removed from the reaction mixture. Next, 4-hydroxybenzoic acid is added, and the temperature is further raised to 320° C. and the reaction temperature is maintained which allows the reaction to proceed, to give a liquid crystal oligomer having one or two terminal alcohol groups at one or both ends of the backbone. The liquid crystal oligomer is dissolved in a proper solvent (e.g., N,N-dimethylformamide, abbreviated “DMF”), and then a compound (e.g., maleimidobenzoic acid, nadimide benzoic acid, or acetylene benzoic acid) capable of providing thermally crosslinkable reactive groups (e.g., maleimide, nadimide or acetylene groups) is added to the solution. The mixture is allowed to react to give the liquid crystalline thermoset oligomer having one or two thermally crosslinkable reactive groups at one or both ends of the backbone thereof.

来源