| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 고분자 합성 |
| 제목 | Synthesis and Characterization of poly (urethane-methyl methacrylate) Hybrid Emulsion with variable DMPA content and NCO/OH ratio |
| 초록 | Abstract Poly(urethane-methyl methacrylate) hybrid emulsions were synthesized to investigate their thermo-mechanical, solvent-resistance and chemical resistance properties. In the synthesis, dimethylol propionic acid was used to impart hydrophilicity to the hybrid polymers and methyl methacrylate monomer was added to the polyurethane prepolymer after the neutralization with triethylamine to improve the mechanical properties. After dispersion of the neutralized prepolymer, chain extension was carried out with ethylene diamine. Consequently, poly(urethane-methyl methacrylate) hybrid emulsions were prepared via soap-free emulsion polymerization of methyl methacrylate using potassium peroxydisulfate as initiator at 70℃. Solvent-resistance, tensile strength, and 100% modulus properties of hybrid emulsions were tested and compared. In these experiments, methyl methacrylate percentage was kept constant (30%) and DMPA and NCO/OH ratio of the hybrid emulsions were varied. The crystallinity of each samples was investigated with differential scanning calorimetry patterns. The viscosity of PU-MMA hybrid emulsion with variable DMPA contents was investigated with viscometor. |
| 저자 | 염지윤, 이정민, 김중현 |
| 소속 | 연세대 |
| 키워드 | polyurethane hybrid; methylmethacrylate; viscosity; NCO/OH ratio |
