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Poly(2-ethyl-2-oxazoline)/Poly(acrylic acid) 계의 수소결합 특성 및 이용

The Properties and Applications of Hydrogen Bonding in Poly(2-ethyl-2-oxazoline)/Poly(acrylic acid) System

김진희 장우진 구윤모^†

Jin-Hee Kim Woo-Jin Chang Yoon-Mo Koo^†

인하대학교 응용화학부, 인천 402-751

School of Chemical Engineering, Inha University, Incheon 402-751, Korea

HWAHAK KONGHAK, August 2001, 39(4), 477-480(4), NONE

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Abstract

본 연구에서는 pH 변화에 따른 Poly(2-ethyl-2-oxazoline)[PEO(x)]과 Poly(acrylic acid)[PAA]의 수소결합 특성을 고찰하였다. PEO(x)와 PAA는 산성 조건(pH 4.3 이하)하에서 PAA의 수소와 PEO(x)의 산소간에 수소결합으로 안정한 복합체를 형성하여 침전하였다. PEO(x)와 PAA 혼합용액을 수성이상계에 적용하기 위한 최적 반응비는 질량이 1:1.5이었고, 이 고분자 혼합용액은 수소결합을 제거한 상태에서 dextran 용액과 수성이상계를 형성하였다.

The properties of hydrogen bonding between poly(2-ethyl-2-oxazoline)[PEO(x)] and poly(acrylic acid)[PAA] were investigated. PEO(x) and PAA formed stable complexes and precipitated due to hydrogen bonding between hydrogen of PAA and oxygen of PEOx in acidic conditions(below pH 4.3). Optimum reaction ratio of PEO(x) and PAA was determined as mass ratio 1 : 1.5 for applications in aqueous two phase system. The mixtures of the polymers formed aqueous two phase system with dextran solution after breaking hydrogen bonding. This properties can be used for the recovery of a target product.

Keywords

Poly(2-ethyl-2-oxazoline) Poly(acrylic acid) Hydrogen Bond Aqueous Two-Phase System

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