초록

본 연구는 상용제로서 사용될 수 있는 block copolymer를 제조하기 위하여 분자구조적 측면에서의 상용기구를 고찰하고 S-B block copolymer를 합성하였다. 각 반응 조건에 따라 합성된 block copolymer를 분석하였으며 특히 미세구조와 반응조건의 관계를 규명하고 상용제 자체의 열특성 및 가공특성등을 조사하였다.합성된 block copolymer의 응용을 위하여 수소화 반응에 대하여 문헌적 고찰을 하였으며 형태학을 이용한 기능성 재료의 이론과 응용에 대해서도 조사하였다.

Abstract ▼

To synthesize a block copolymer useful as a compatibilizer, we investigated polymer-polymer compatibilizing system from the molecular design point of view. As a test, we synthesized S-B block copolymers in many different reaction conditions. Synthesized block copolymers were analyzed. Generally we c

To synthesize a block copolymer useful as a compatibilizer, we investigated polymer-polymer compatibilizing system from the molecular design point of view. As a test, we synthesized S-B block copolymers in many different reaction conditions. Synthesized block copolymers were analyzed. Generally we could synthesize the block copolymer by adding monomers separately. Reduction of scarvenger level and the purification of the second monomer were important to produce a narrow molecular weight distribution. The microstructure of polybutadiene block could be contolled by the solvent. Using cyclohexane solvent produces 1,4 structure dominating polybutadience. 1,2 structure is prevalent if THF is used. Microstructure could be controlled depending on the ratio of mixed solvents. As we can expect, thermal behavior of S-B block copolymer varied with the styrene contents. Thermo-mechanical experiments showed a glass transition temperature more obviously than thermal analysis. Viscosity curve of S-B block copolymer exhibited a yield behavior at low frequency. The variation of modified Cole-Cole plot(G' vs G" curve)with the temperature was also observed. Viscosity decreased with temperature but storage modulus increased with temperature. Temperature influence on storage modulus was evident at low frequency range.This report is a partial result of our continuous study. Further results about the characteristics of S-B block copolymer, PSt-PE block copolymer and its applications will be reported in the future.

목차 Contents

• 제1장 서 론...17
• 제1절 고분자간의 상용성...17
• 1. 상용성의 정의 및 이론적 배경...17
• 2. 고분자 상용제의 설계 및 합성...20
• 제2절 Styrene-butadiene block copolymer의 합성...23
• 1. Styrene-butadiene copolymer의 음이온 중합...23
• 2. Styrene-butadiene copolymer의 응용-수소화...27
• 제2장 실 험...32
• 제1절 실험장치...32
• 제2절 시약 및 정제...33
• 제3절 제 측정...35
• 1. 분자량 및 분자량 분포...35
• 2. 미세구조...35
• 3. 유변학적 특성 측정...35
• 4. Thermo-mechanical properties...37
• 5. 열분석...37
• 제3장 결과 및 토론...38
• 제1절 중합조건과 중합결과...38
• 제2절 미세구조...43
• 제3절 열분석...49
• 제4절 유동특성...54
• 제4장 Block copolymer의 형태학과 이의 응용...60
• 제5장 결 론...68
• 참 고 문 헌...70