| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
고분자합성 |
| 제목 |
Characteristics of polyurethane dispersions for various NCO/OH ratio |
| 초록 |
Polyurethane dispersions (PUDs) were synthesized at various NCO/OH ratio to alter the hard segment content. After reacting polyols having -OH groups with isophorone diisocyanate having -NCO groups at both ends, dimethylol propionic acid were added as a hydrophilic monomer to synthesize prepolymer. All samples were neutralized using triethylamine, and finally PUDs were prepared chain extended with ethylenediamine after the aqueous dispersion process. The viscosity and particle size of PUDs were measured to confirm the effect of NCO/OH ratio. The mechanical and thermal properties of the cast PUD films were also analyzed, which showed that average particle size, tensile strength, thermal degradation stability, and Tg of PUDs increased with the increase of NCO/OH ratio. On the other hand, the viscosity and elongation at break of PUDs increased with the decrease of NCO/OH ratio. |
| 저자 |
김은진1, 권용록1, 김정수1, 장영욱2, 김동현1
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| 소속 |
1한국생산기술(연), 2한양대 |
| 키워드 |
polyurethane dispersion; NCO/OH ratio; hard segment; mechanical properties; thermal properties
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| E-Mail |
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