Degradation mechanism of building coating materials using accelerated UV exposure in controlling degradation factors

Research Project

Project/Area Number	26630253
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Building structures/Materials
Research Institution	The University of Tokyo
Principal Investigator	Kitagaki Ryoma 東京大学, 工学(系)研究科(研究院), 講師 (20456148)
Project Period (FY)	2014-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000) Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000) Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords	塗膜 / 紫外線劣化 / 熱移動
Outline of Final Research Achievements	(1) Development of deterioration testing equipment which can control the deteriorating factors separately including UV.(2) Gas permeability and diffusion coefficient of coatings are measurable with Thermal desorption system (3) Most building coatings are thought to be glass formation as rubber formation polymer where gas permeates and diffuses not depending on Fick’s law and Henry’s law. (4) Gas permeability and diffusion in building coatings transit behavior depending on temperature and humidity condition.(5) Interaction between gas species in diffusion process of building coatings is observed using TDS measurement.(6) Free volume theory should be introduced for understanding gas diffusion transition in building coatings under several temperature and humidity condition.