建築用ゴム系材料の変動するオゾン濃度下での劣化の評価

概要

論文の詳細を見る
This paper deals with the ozone degradation of rubber sheet for roof covering under fluctuating concentration. The ozone degradation under constant concentration can be expressed by the following equation. t=10^B/X^A ∴ X^A・t=10^B, where t=time to failure, cracking or rupturing, hrs X=ozone concentration, pphm A,B=material constants. The effect of fluctuation ozone concentration may be expressed by the integration of ozone concentration with time. The material constants, A and B were determined by the test under constant ozone concentration. Then the test under fluctuating concentration, following sine curves. Comparing both results obtained by the test and calculation, It is concluded that the effect of fluctuating ozone concentration can be estimated by the integration of ozone concentration with time.
社団法人日本建築学会の論文
1991-10-30