화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2018년 가을 (10/10 ~ 10/12, 경주컨벤션센터)
권호 43권 2호
발표분야 고분자합성
제목 Waterborne polyurethane dispersions prepared using different molecular weights of diols and their effect on gloss of the resulting film.
초록 Waterborne polyurethane (WPU) coating films with low gloss can be prepared using additives (e.g., matting agents such as silica). However, the matting agents tend to disperse imperfectly due to the incompatibility between the additives and WPU dispersion, leading to inhomogeneity of gloss. Furthermore, the gloss increases due to disappearance of the agents after a period of use. In this study, a series of WPU dispersions were synthesized using diols with different molecular weights via prepolymer emulsification process. The resulting polymer films were characterized with respect to surface morphology, light transmittance, water absorption, tensile strength, gloss, etc. Overall, the increase in molecular weight of diol from 1000 to 2000 increased the flexibility of the resulting WPU film with decreased gloss. However, when the molecular weight of the diol was increased from 2000 to 3000, the gloss increased again.
저자 바타라이서우랍1, 이성일2, 김종수1, 이연식1
소속 1전북대, 2룩스폴리(주)
키워드 Waterborne polyurethane; prepolymer emulsion; low gloss coating; surface morphology
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