| 학회 | 한국고분자학회 |
| 학술대회 | 2003년 봄 (04/11 ~ 04/12, 연세대학교) |
| 권호 | 28권 1호, p.209 |
| 발표분야 | 고분자 구조 및 물성 |
| 제목 | Effects of Blowing Agents on the Properties of Polyurethane Foams |
| 초록 | Rigid polyurethane foams (PUF) were prepared from polyether polyols, polymeric 4,4’-diphenylmethane diisocyanate (PMDI) having functionality of 2.9, distilled water as blowing agent, amine catalysts, and silicone surfactant. When the OH value of trifunctional polyols increased from 290 to 670, the density of the PUF samples increased from 116.1 to 129.2 kg/m3 at 1.0 php water content. When the OH value of trifunctional polyols increased from 290 to 670, the compressive strength of the PUF samples increased from 0.92 to 1.48 MPa at 1.0 php water contents. When the functionality of polyols with OH values of 400 increased from 3 to 4, the compressive strength of the PUF samples increased from 1.17 to 1.26 MPa at 1.0 php water content. But when the functionality of polyols with OH values of 490 increased from 4~5 to 6, the flexural strength of PUF samples decreased from 2.19 to 1.82 MPa at 1.0 php water content. The reactivity of forming PUF increased with an increase in catalyst and water contents. The compressive strength, and glass transition temperature of PUF increased with an increase in NCO Index, in spit of a little increase of density, because of an increase in degree of crosslinking of PUF. ACKNOWLEDGEMENT : This study was supported by research grants from the Carbon Dioxide Reduction and Sequestration R&D center (CDRS), 21C Frontier R&D Program, Daejeon, Korea. |
| 저자 | 서원진;한재성;승유택;신민철;김우년 |
| 소속 | 고려대 |
| 키워드 | NCO Index; crosslinking; OH value; functionality |
