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Pro041

Quantitative evaluation of synergistic effect of ultraviolet radiation and temperature in outdoor environment used of weathering reference materials



Title: Quantitative evaluation of synergistic effect of ultraviolet radiation and temperature in outdoor environment used of weathering reference materials
Author(s): Y. Takane
Paper category : conference
Book title: RILEM International Symposium on Environment-Conscious Materials and Systems for Sustainable Development
Editor(s): N. Kashino and Y. Ohama
Print-ISBN: 2-912143-55-1
e-ISBN: 2912143640
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 59 - 66
Total Pages: 8
Nb references: 5
Language: English


Abstract: The weatherability of polymeric building materials are affected by ultraviolet ray, temperature, moisture etc... In some cases, they influenced synergistically, so that it is very difficult to evaluate the exposure environment quantitatively. In order to evaluate the synergistic effect of exposed conditions, polyethylene, polycarbonate and poly(ethylene terephthalate) films are exposed in outdoors as reference materials. These specimens are collected and replaced with new ones each month. These short-term exposure tests were repeated more than 1 year in several places in Japan. The results of these tests were analyzed by multiple regression analysis, which uses ultraviolet radiation, ambient temperature, and humidity as a factor and by Koike & Tanaka's model, which is able to calculate the synergistic effect of ultraviolet radiation and ambient temperature. From these analyses, it is recognized that the values of reference materials could express the synergistic effect of ultraviolet radiation and temperature so that it shall be adopted as a new concept of exposure stage.


Online publication: 2004-11-24
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143640.007