Solid phase tackifying method of liquid crystal polymer
A technology of liquid crystal polymers and solid phase viscosity increase, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems affecting the rheological properties of TLCP, the color of TLCP turns yellow, and limit the application of TLCP, so as to achieve good heat and mass transfer Good effect, increase molecular weight, good color performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0050] A kind of embodiment of the solid-phase thickening method of liquid crystal polymer of the present invention comprises the following steps:
[0051] (1) Preparation of TLCP prepolymer
[0052] In a reaction kettle equipped with a stirrer, a thermometer, a nitrogen inlet pipe and a reflux condensing device, add 979.83kg of monomer p-hydroxybenzoic acid, 440.32kg of 4,4'-biphenyldiphenol, 294.63kg of terephthalic acid, Isophthalic acid 98.21kg, and adding acetic anhydride 1271.19kg is that acylating agent and 1-methylimidazole 2.07kg are catalyzer; Then nitrogen is fed into the reactor to replace; Heating from room temperature to 150°C, reflux at this temperature for 2 hours; then continue to heat up, and heat the mixture from 150°C to 320°C for 3 hours, during which unreacted acetic anhydride and by-product acetic acid are evaporated; final polycondensation stage , decompress the reaction system, and judge the key point of the end of the reaction by observing the increa...
Embodiment 2
[0057] A kind of embodiment of the solid-phase thickening method of liquid crystal polymer of the present invention comprises the following steps:
[0058] (1) Preparation of TLCP prepolymer
[0059] In a reaction kettle equipped with a stirrer, a thermometer, a nitrogen inlet pipe and a reflux condensing device, add 627.78 kg of monomer 6-hydroxy-2-naphthoic acid, 428.55 kg of hydroquinone, 323.29 kg of terephthalic acid, 2,6 -naphthalene dicarboxylic acid 420.71kg, and adding 569.32kg of acetic anhydride is that acylating agent and 1.8kg of 1-methylimidazole are catalyzer; Then nitrogen is passed into the reactor to replace; Heating from room temperature to 140°C, reflux at this temperature for 1 hour; then continue to heat up, and heat the mixture from 140°C to 300°C over 2 hours, during which unreacted acetic anhydride and by-product acetic acid are evaporated; final polycondensation stage , decompress the reaction system, and judge the key point of the end of the reactio...
Embodiment 3
[0064] A kind of embodiment of the solid-phase thickening method of liquid crystal polymer of the present invention comprises the following steps:
[0065] (1) Preparation of TLCP prepolymer
[0066] In a reaction kettle equipped with a stirrer, a thermometer, a nitrogen inlet pipe and a reflux condensing device, add 1605.14 kg of monomer p-hydroxybenzoic acid, 120.22 kg of 2,6-naphthalenediol, 53.63 kg of terephthalic acid, and isophthalic acid Diformic acid 53.63kg, and adding acetic anhydride 7933.22kg is an acylating agent and 1-methylimidazole 54.44kg is a catalyst; Then nitrogen is passed into the reactor for replacement; Start stirring, and the reaction mixture is heated by room temperature in a nitrogen stream to 160°C, reflux at this temperature for 3 hours; then continue to heat up, and heat the mixture from 160°C to 350°C over 4 hours, during which unreacted acetic anhydride and by-product acetic acid are distilled off; final polycondensation stage, for The reactio...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Melting point | aaaaa | aaaaa |
| Melt viscosity | aaaaa | aaaaa |
| Melting point | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More