| 학회 |
한국고분자학회 |
| 학술대회 |
2007년 가을 (10/11 ~ 10/12, 일산킨텍스) |
| 권호 |
32권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Effect of Ionic Group Position in Waterborne Polyurethanes |
| 초록 |
Waterborne polyurethanes have been designed based on the different positions and concentrations of ionic groups and different molecular weights of polyol. It was found that dispersions containing ionic groups at the chain termini (called terminal ions) gave the smallest dispersion size, highest dispersion stability and viscosity, whereas hard ions containing ionic groups in hard segments gave the greatest water swelling and lowest dispersion stability. It was demonstrated that highly stable dispersions of high solid content can be obtained at low ionic content by simply incorporating the ionic groups at flexible chain ends. The results were interpreted in terms of high mobility and low free energy of chain ends. The tensile properties and dynamic mechanical properties showed similar values. These results showed that the concentration and position of ionic group do not have an influence on the mechanical properties. |
| 저자 |
이수경, 김병규
|
| 소속 |
부산대 |
| 키워드 |
Waterborne polyurethane; Terminal ion
|
| E-Mail |
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