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題 名 | 光劣化塗膜之紅外線光譜分析技術之比較 |
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作 者 | 張上鎮; 顧文君; | 書刊名 | 林業試驗所研究報告季刊 |
卷 期 | 6:1 1991.03[民80.03] |
頁 次 | 頁45-56 |
分類號 | 474.33 |
關鍵詞 | 光劣化; 光譜分析; 技術; 紅外線; 塗膜; |
語 文 | 中文(Chinese) |
中文摘要 | 塗料之功能為保護與美化木質製品,但是卻很容易受光影響而產生化 學變化,本試驗以三種紅外線光譜分析技術,即傳統穿透透明塗膜、穿透溴化鉀 圓板、衰減全反射(MIR),分析受光影響後之硝化棉與聚胺基甲酸酯塗料的化學 變化。試驗結果得知,傳統以紅外光穿透透明塗膜與穿透溴化鉀圓板二種分析方 法適用於分析經過長時間光劣化塗膜之化學變化,而衰減全反射則為一靈敏之非 破壞性分析技術,適用於偵測塗膜於光劣化初期時所產生輕微的表面化學變化, 並可分析傳統穿透式分析技術所無法分析的不透明塗膜之化學結構變化。此外, 三種紅外線光譜分析技術之優點及其特性亦於文中詳細討論與比較。 |
英文摘要 | Although clear coatings perform protection and decoration function, they are susceptible to photodegradation after exposure to ultraviolet light. In order to improve the photostablilty of clear coatings the light-induced degradation mechanisms should be elucidated. Infared spectroscopy has played an important role in the analysis of protective coatings. Therefore, in this study three different infrared sample preparations including transmission film, KBr disc and multiple internal reflectance (MIR) were applied to monitor the variations of infrared spectra of nitrocellulose and polyurethane coatings degraded by ultraviolet light (λ>275nm). Experimental results indicate that MIR is an excellent non- destructive surface analytical technique for early detection of subtle chemical changes occurring at top surface of coatings after a short-term exposure period. The others are insensitive for the detection of the early indications of coating deterioration, but are useful for monitoring the surface changes in composition after exposure to ultraviolet light for longer periods. The nature of the infrared analytical data provided by these three different techniques is compared in details in the study. |
本系統中英文摘要資訊取自各篇刊載內容。