공업화학 (Applied Chemistry for Engineering)
- 제1권1호
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- Pages.73-82
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- 1990
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- 1225-0112(pISSN)
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- 2288-4505(eISSN)
로진-말레산 부가물과 디이소시아네이트로부터 폴리아미드이미드의 합성시 용제의 효과
The Effect of Solvents on the Synthesis of Polyamideimides from Rosin-Maleic Anhydride Adduct and Diisocyanate
- Kim, Jum-Sik (Department of Industrial Chemistry, College of Engineering, Hanyang University) ;
- Choi, Byung-Oh (Department of Chemical Engineering, College of Engineering, Soongil University) ;
- Choi, Hyeong-Ki (Department of Industrial Chemistry, College of Engineering, Hanyang University)
- 투고 : 1990.08.31
- 발행 : 1990.10.31
초록
로진과 말레산무수물로부터 rosin-maleic anhydride adduct (RMA)를 합성하고 이를 방향족디이소시아네이트와 반응시켜서 폴리아미드이미드를 합성하였다. 반응촉매로는 Sodium methoxide (
Rosin-maleic anhydride adduct (RMA) was synthesized from rosin and maleic anhydride. The polyamideimides were obtained by reacting the adduct with two aromatic diisocyanates using sodium methoxide as catalyst. The yield and the inherent viscosity of polymers obtained by the reaction in NMP solvent were low because of the possible reaction of NMP solvent with diisocyanate monomer. The polymers were synthesized in solvent mixture of NMP and cosolvents such as xylene, acetophenone, benzonitrile, and nitrobenzene in order to minimize the side reaction of NMP with diisocyanates. The yield of polymer obtained by the reaction in NMP-nonpolar cosolvent mixtures was about 70% and that obtained by the reaction in NMP-polar cosolvent mixtures was over 90%, respectively. The polymers were either amorphous or poorly cystalline, and soluble only in highly polar solvents. The inherent viscosity of polymers ranges from 0.12-0.26dl/g. The results of thermal analysis showed that the polymer had good thermal stability with initial decomposition temperature over
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