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HWAHAK KONGHAK,
Vol.34, No.4, 471-476, 1996
Vol.34, No.4, 471-476, 1996
가교 4-비닐피리딘 고분자와 알킬할라이드의 4차화 반응의 속도론적 연구
A Kinetic Study on the Quaternization of Cross- linked Poly(4-vinylpyridine) with an Alkyl Halide
3%, 5%, 10%의 가교도를 갖는 폴리(4-비닐피리딘) 구형입자를 합성하여, 알킬할라이드와의 4차화 반응에 대하여 연구하였다. 4차화 반응속도는 폴리(4-비닐피리딘)구형입자의 가교도가 증가할수록, 알킬할라이드의 알킬기가 클수록 반응속도는 감소하였으나, 사용된 용매의 극성이 증가할수록 반응속도는 증가하였다. 특히 4차화 반응이 어느 정도 진행된 후에는 반응속도가 급격히 감소하는 것을 알 수 있었으며, 이에 대한 적절한 모델을 제시하였다.
Poly(4-vinylpyridine) resin beads with 3%, 5%, and 10% crosslinkings were prepa- red, and then the quaternization by alkyl halides was investigated. The quaternization rate de- creased with increasing the degree of crosslinking and the size of alkyl halide, however, increased with increasing the dielectric constant of solvent. Particularly the reaction rate steeply decreased as the quaternization more or less proceeded and this phenomenon could be interpreted through the proposed model.
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