Living polymerization of 2-(dimethylamino)ethyl methacrylate (DMAEMA) which contains tertiary amino functional group was achieved by group-transfer polymerization(GTP). The resulting polymer had the controlled molecular weight and narrow molecular weight distribustion. Di-, and triblock copolymers were prepared easily by sequential addition of 2-(dimethylamino)ethyl methacrylate (DMAEMA) and methyl methacrylate (MMA) or butyl methacrylate (BMA) using mono- and difunctional initiator at room temperature. The resulting polymers, as a class of non-ionic polymeric surfactant, exhibited excellent surface activity and lowered the surface tension of their aqueous solutions. Their molecular weight and composition could be controlled by regulating the ratio of monomer to initiator and the feed ratio of two monomers, respectively. The extent of the surface tension lowering was affected by molecular weight and composition of block copolymers. The optimum composition for the highest surface activity was varied with molecular weight. The lowest $\gamma$ value reached to 23.1 dyn/cm in the ABA type triblock copolymer of 1,000 (g/mol) of molecular weight. Polymer reactions of poly(DMAEMA) with iodomethane and with 1,4-butane sultone were studied. The degree of conversion of the amine pendant group determined by $^1$H NMR was quantitative in both cases. Different amphiphilic triblock copolymers of hydrophobic n-butyl methacrylate (BMA) and hydrophilic 2-methacryloyloxyethyltrimethyl ammonium iodide were prepared by the reaction of precursor polymer and iodomethane. The precursor polymers were obtained by Group-Transfer Polymerization (GTP) of BMA with 2-(dimethylamino)ethyl methacrylate (DMAEMA) using a difunctional initiator at room temperature. Their molecular weight and composition could be controlled by regulating the monomer to initiator ratio and the feed ratio of two monomers. From quantitative quaternarization of poly(DMAEMA) segments of precusor polymers by iodomethane, the target polymers were prepared. These amphiphilic triblock copolymers exhibited excellent surface activity and lowered the surface tension of their aqueous solutions. The lowest $\gamma$ value reached to 27.4 dyn/cm.
그룹 전이 중합을 통하여 삼중 아민 기능기를 가지는 모노머인2-(다이메틸아미노)에틸 메타아크릴레이트를 리빙중합할 수 있었다. 생성된 고분자는 그 분자량 조절이 가능하였으며 작은 분자량 분포를 보여주었다. 상온에서 단일 과 양쪽성 개시제를 이용하여 2-(다이메틸아미노)에틸 메타아크릴레이트의 중합체를 친수성기로 가지며 소수성기로서 부틸 메타아크릴레이트 중합체를 포함하는 디, 와 트리블락 공중합체를 쉽게 합성할 수있었다. 이 고분자들은 비이온성 고분자 계면활성제로서 뛰어난 표면활성을 보였고 물에 녹았을때 그수용액의 표면장력이 23.1 dyn/cm까지 떨어지는 것으로 관찰 되었다. 이런 블락 공중합체들의 분자량과 조성은 단량체와 개시제의 비율 그리고 두 단량체의 비율을 바꾸어 조절할 수 있었다. 본 연구에서는 첫째 지금까지 거의 연구가 되어있지 않았던 고분자 계면활성제에 있어서 친수성 블록의 길이 변화에 따른 표면활성의 변화를 연구하였고 둘째 친수성 블록의 간단한 유기반응들을 연구하였으며 세째 이러한 간단한 유기반응을 통한 새로운 작용기의 도입에 대해서 연구하였다.
