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題 名 | 多元醇液化柳杉為基質PU樹脂之薄膜性質及填縫膠合性能=Properties of Films and Performances of Gap-filling Adhesion of Polyurethane Resins Made from Polyhydric Alcohol Liquefied Cryptomeria japonica |
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作 者 | 高毓斌; 李文昭; | 書刊名 | 林業研究季刊 |
卷 期 | 33:3 2011.09[民100.09] |
頁 次 | 頁79-89 |
分類號 | 467.41 |
關鍵詞 | 填縫膠合; 液化柳杉; 聚胺基甲酸酯樹脂; 樹脂薄膜; Gap-filling adhesion; Liquefied Cryptomeria japonica; Polyurethane resins; Films; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究將多元醇液化柳杉與 Desmodur L 及 Desmodur N兩種異氰酸酯在不同 NCO/ (OH+COOH) 官能基莫耳比條件下混合調配聚胺基甲酸酯樹脂 (Polyurethane resins; PU resins),分 析其所製作 PU 樹脂薄膜之物理、機械性質及熱性質,並探討此 PU 樹脂應用於木材填縫膠合之可 行性。由試驗結果得知,以 Desmodur N 為原料者之薄膜有較佳耐溶劑性及較大的拉伸變形量,以 Desmodur L 為原料者則有較大之彈性係數。DSC分 析顯示常溫硬化之 PU 樹脂在熱掃描過程均出現 放熱現象,其中以 Desmodur L 為原料者放熱現象較明顯,其放熱峰高度及溫度範圍均較大;TGA 分析顯示以 Desmodur N 為原料者有較佳之耐熱性,其熱裂解重量損失主要發生在 300-400℃,而以 Desmodur L 為原料者則發生在 200-350℃,然不同 NCO/(OH+COOH) 莫耳比 PU 樹脂均呈現相似之 熱裂解現象。將 PU 樹脂應用於填縫膠合時,以 Desmodur L 為原料且採用 NCO/(OH+COOH) 莫耳 比1.5者具有最佳之溫水浸水及反覆煮沸浸水膠合強度。 【關鍵詞】填縫膠合、液化柳杉、聚胺基甲酸酯樹脂、樹 |
英文摘要 | In this study, polyhydric alcohol liquefied Cryptomeria japonica was blended with different isocyanate (i.e. Desmodur L and Desmodur N) with various NCO/(OH+COOH) molar ratios to prepare polyurethane resins. The physical, mechanical and thermal properties of PU films were analyzed and the feasibility of gap-filling adhesion of these PU resins was also investigated. The results show that films madewith Desmodur N had the better solvent-resistance and had a larger tensile deformation. However, films that using Desmodur L as the raw material a higher elastic modulus. DSC analysis shows that room temperature cured PU resins appeared an exothermic phenomenon during the period of heat-scanning. While, using Desmodur L as the raw material had an exothermic peak with larger height and broader temperature range. TGA analysis shows that using Desmodur N as the raw material had a better heat-resistance; their weight loss due to thermo-degradation mainly occurred at 300-400℃, but it occurred at 200-350℃ for those using Desmodur L as the raw material. However, the PU resins with various molar ratios of NCO/ (OH+COOH) had similar thermal degradation behavior. When PU resins were used for gap-filling adhesion, using Desmodur L as the raw material with the NCO/(OH+COOH) molar ratio of 1.5 had the best bonding strength after warm water and repetitive boiling water soaked. |
本系統中英文摘要資訊取自各篇刊載內容。