| 학회 |
한국화학공학회 |
| 학술대회 |
2005년 봄 (04/22 ~ 04/23, 여수대학교) |
| 권호 |
11권 1호, p.85 |
| 발표분야 |
고분자 |
| 제목 |
Synthesis and Properties of Polyurethane/Clay Nanocomposite by the Clay Modified with Polymeric MDI |
| 초록 |
Polyurethane (PU)/clay nanocomposite was synthesized from the polyol, polymeric 4,4’ diphenylmethane diisocyanate (PMDI), and the clay modified with the PMDI. To achieve the clay modified with the PMDI, silanol group of the clay and NCO group of the PMDI were reacted for 24 hours at 50℃ to form urethane linkage. FT-IR analysis of the clay modified with the PMDI demonstrated that the NCO characteristic peak was observed in the clay after modification reaction with the PMDI. From the result of X-ray pattern, it was suggested that the clay layers were exfoliated from the PU/clay nanocomposite. From the results of the mechanical property, the maximum values of the flexural and tensile strength were observed when the 3 wt % of the clay based on PMDI was added into the PU/clay nanocomposites. The Tg and ΔCp of the PU/clay nanocomposite decreased with an increase in the modified clay content. We suggested that the decrease in the ΔCp with the modified clay content might be due to the increase of steric hindrance by the exfoliated clay layers. |
| 저자 |
한성재1, 서원진1, 김우년1, 최건형2, 최성희2, 이영범2, 김상범3
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| 소속 |
1고려대, 2한국가스공사, 3경기대 |
| 키워드 |
polyurethane; clay modification; nanocomposite; exfoliation; polymeric 4; 4’diphenylmethane diisocyanate (PMDI)
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| E-Mail |
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| 원문파일 |
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