Material Drying
14 조회수
Polyamic acid（PAA）solution viscosity control
문제 현상
PAA solution viscosity is too high or too low to be processed normally by casting or coating
원인 분석
Improper control of polycondensation reaction degree (monomer ratio, reaction temperature and time); solvent water content affects the degree of polymerization
해결 방법
Strictly control the equimolar ratio of dianhydride and diamine; control the reaction temperature at -5~10°C (low-temperature solution polycondensation); use dry solvent
핵심 요약
The molecular weight and viscosity of PAA are the primary control parameters for PI processing
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