The configuration effect of PMAA on the formation of interpolymer complex with PLP derivatives has been studied. From the results of several experiments(e.g., turbidimetry, viscometry, polarimetry, scanning electron microscopy, and FTIR study) it is proved that the configurational sequence of PMAA affect on the formation of interpolymer complex. In the formation of interpolymer complex with PLP, syn-PMAA shows better ability than at-PMAA in water/dioxane solvent system. We obtained the same result from the POAHP:PMAA mixtures.
Because it is reported that at-PMAA make interpolymer complex with PLP through hydrogen bonding in water solvent, the great difference of behavior between syn-PMAA and at-PMAA in this study using water/dioxane (1/1) gives some probability of stereocomplex formation of syn-PMAA. Syn-PMAA has an alternative configuration of repeating units wheareas at-PMAA has irregular one. On the other hand PLP and POAHP has helical struture due to the steric restriction about the N-C bond of pyrrolidine ring without intramolecular hydrogen bond. For the formation of stereocomplex the stereo regularity is very important.
In this study we worked in the water/dioxane(1/1) solvent system rather than water for the difference of solubility between PLP and POAHP. Therefore the contribution on the stabilization of complex due to hydrophobic effect reduced than in water solvent so that the configuration effect of PMAA appeared important.
폴리 메타크릴산(PMAA)의 컨피그레이션이 폴리 엘 프롤린(PLP) 유도체와의 고분자 복합체 형성에 미치는 효과를 연구하였다. 여러가지 실험결과 (점성도, 흐림도, 광회전도, 전자현미경사진, FTIR) 에 의해 PMAA 의 컨피그레이션 배열이 고분자 복합체 형성에 영향을 미친다는 것을 밝혔다. 반복단위의 컨피그레이션이 규칙적으로 배열된 신디오탁틱 폴리 메타크릴산 (syn-PMAA)은 불규칙한 배열의 에이탁틱 폴리 메타크릴산 (at-PMAA)보다 PLP 유도체와 복합체를 잘 형성하였다. atPMAA 는 수소결합을 통해 물 용매하에서 PLP 와 고분자 복합체를 형성함이 이미 밝혀졌으며 이렇게 생성된 복합체는 소수성 효과에 의해 안정화한다. 물/다이옥산(1/1) 용매에선 물을 용매로 한 시스템에서보다 소수성도가 감소하며 이 결과 syn-PMAA 가 PLP 유도체와의 공간구조적 복합체를 형성하는데 기여한다.
