Color Appearance of the Polymer Thin Films on Several Base-plates.

Research Project

Project/Area Number	03808007
Research Category	Grant-in-Aid for General Scientific Research (C)
Allocation Type	Single-year Grants
Research Field	家政学
Research Institution	CHIBA UNIVERSITY
Principal Investigator	MAEJIMA Masako Chiba University,Faculty of Education,Professor, 教育学部, 教授 (70101219)
Project Period (FY)	1991 – 1992
Project Status	Completed (Fiscal Year 1992)
Budget Amount *help	¥1,800,000 (Direct Cost: ¥1,800,000) Fiscal Year 1992: ¥100,000 (Direct Cost: ¥100,000) Fiscal Year 1991: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywords	Polymer thin film / Interferance color / Base-plate / Surface geometry / Croma / 分光反射率 / 屈折率 / 干渉効果 / 膜厚 / 変角測色 / 入射角
Research Abstract	We examined the color of thin films of poly(methyl methacrylate) and styren-acryl copolymer on several base-plates of different surface structures. This study would contribute to find the optimum using condition and suitable design of the polymers. Obtained c^values(croma, c^=(a^<2>+b^<2>)^<1/2>) of samples on each base-plate are as follows: /silicon wefer 7.6 - 52.7, /stainless steel(polished) 13.2 - 26.7, /stainless(half polished) 10.1 - 22.7, /stainless(non-polished) 3.2 - 8.7, /aluminum plate(non-polished) 0.8 - 1.7,/paper(black,flannel-like) 13.5 - 39.5. These c^values coincide with the tendency of visual inspection. The base-plate of regular reflection presents effective croma. The cracks or roughness in the surface invite lower values of c^. Increase of the air in the surface geometry of the base-plate brings out the reverse interferance colors. Spectral reflectance(/silicon wefer) was analyzed by the thin film reflectance equation: R(lambda)=B^2+C^2+2BCcos((4pind/lambda)+eta(lambda)).We propose to adopt the correction for the reflectance of the base-plate for better mutual fitting.