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1액형 폴리우레탄 상도용 자동차 도료 물성 변화에 관한 연구
김재익,남준현,이재우 한국공업화학회 2003 응용화학 Vol.7 No.1
The isocyanate functional group can be blocked through one of the several methods. Commonly, one thinks of a blocked isocyanate as one in which the isocyanate group is reacted with an active hydrogen compound. Oxime blocked isocyanate, particularly using butanone oxime are widely used for cross linking hydroxy-functional resins. For example, Oxime blocked 1,6-diisocyanatohexane and 1-isocyanato-3-aminomethyl-3,5,5-trimethylcyclohexane with a combination of hydroxy-functional acrylic and polylic and polyester resins give etch resistant and mar resistance clear top coats that can be cured at 130℃∼150℃. However, Oxime blocking agent cured catings tend to yellow during curing and exposure. So this paper attempts to reduce yellowing and improve environmental etch resistance (acid rain spotting), scratch trsistance, long term durability etc.
김재익,류승훈 慶熙大學校 材料科學技術硏究所 1999 材料科學技術硏究論集 Vol.12 No.-
Surface modification of polypropylene using ultraviolet/ozone was studied. In this study, the effect of UVO treatment tune and ozone flow rate on the degree of surface modification was evaluated. From contact angle and FTIR-ATR analysis it was observed that oxygen functional groups increased with UVO treatment time and ozone flow rate. Polar surface energy increased with treatment time and ozone flow rate and tended to level off at certain point. It was attributed to the saturation of surface by polar groups. It was identified that UVO could be an effective method to modify the surface of PP.
Surface Composition Change of UV/Ozone Modified Polypropylene
Kim, J. I.,Ryu, S. H. 한국고무학회 2002 엘라스토머 및 콤포지트 Vol.37 No.1
UV 조사시간과 오존유량을 변화시키면서 폴리프로필렌을 UV/오존 산화하였으며 이의 표면특성을 접촉각과 XPS를 이용하여 살펴보았다. 산화된 표면의 노화거동을 공기, 물, 에틸렌 글리콜 하에서 살펴보았으며, 또한 lap shear 실험을 통하여 접착력을 관찰하였다. 극성표면 에너지와 접착력은 UV/오존 처리시간과 오존유량이 증가함에 따라 증가함을 알 수 있었다. 물에서 노화실험을 한 경우 극성표면 에너지의 변화가 없었으나, 공기 하에서 실시한 경우 2-3일 이내에 급격히 감소하여 처리하지 않은 폴리프로필렌의 값에 근접하였다. Polypropylene is oxidized with UV/ozone as a function of UV treatment time and ozone flow rate and its surface characteristics are investigated using contact angle measurements and XPS. The aging behavior of oxidized surface is investigated under air, water and ethylene glycol as the aging media. Adhesion strength is also investigated using a lap shear test. Polar surface energy increases with increasing UV/ozone treatment time as well as ozone flow rate. No polar surface energy change is observed under water aging, while under air aging it decreases significantly within 2-3 days and reaches the close value as that of the untreated PP. Adhesion strength increases with increasing UV/ozone treatment time as well as ozone flow rate.