Name | polyester imide thermotropic liquid crystalline |
Synonyms | polyester imide thermotropic liquid crystalline |
Physical and Chemical Properties | Chemical properties Tg glass transition temperature 120 ℃,Tm melting point temperature 268 ℃,Ti initiation temperature 315 ℃,η ing characteristic viscosity 0.31(L/g). |
Use | Uses for special engineering plastics. |
melt polycondensation method: acetylation of diol or dihydric phenol, feeding the prepared imide-containing dibasic acid and the corresponding acetate at 1:1 isomol, adding an appropriate amount of catalyst (MgO), gradually heating to a certain temperature (300-350 ℃) in stages under the protection of nitrogen, slowly heating for several hours, evacuating 0.5h before the end of the reaction, and finally obtaining the product.