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題 名 | 聚四亞甲基醚二醇/液化柳杉製備聚胺基甲酸酯樹脂之性質=The Properties of Polyurethane Resins Prepared from Polytetramethylene Glycol and Liquefied Cryptomeria japonica |
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作 者 | 高毓斌; 陳奕君; 李文昭; 李文昭; | 書刊名 | 林產工業 |
卷 期 | 34:2 2015.06[民104.06] |
頁 次 | 頁89-99 |
分類號 | 467.4 |
關鍵詞 | 柳杉; 液化木材; 聚胺基甲酸酯樹脂; 樹脂薄膜; 熱分析; Cryptomeria japonica; Liquefied wood; Polyurethane resins; Resin films; Thermal analysis; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究將柳杉(CryptomeriajaponicaDon.;Japanesecedar)木粉以多元醇為溶劑進行液化處理,並利用重量混合比10/0、8/2、6/4、4/6之聚四甲基醚二二醇(Polytetramethyleneglycol;PTMG)/液化柳杉為多元醇原料,異佛爾酮二異氰酸酯(Isophoronediisocyanate;IPDI)為異氰酸酯原料,將多元醇與異氰酸酯在NCO/OH莫耳數比1.5/1及2.0/1條件下以二階段法製備聚胺基甲酸酯樹脂(Polyurethaneresins;PU)。由試驗結果顯示,NCO/OH莫耳數比1.5/1所得PU樹脂液之粘度大於2.0/1者。當PTMG/液化柳杉重量比由10/0調整為8/2時,PU樹脂液之粘度明顯提高;然液化柳杉比例再增加,粘度明顯降低。PU樹脂薄膜中液化柳杉含量較高者,其分子結構中醯胺比例較多,乙酸乙酯溶出試驗之重量保留率較高,但拉伸強度及破壞伸長率較低。DMA分析顯示,含液化柳杉之PU樹脂薄膜具備較高的相轉移溫度,但內部分子結構中存在微相分離現象。PU樹脂之熱裂解行為可區分為三個階段,添加液化柳杉使PU樹脂之起始熱裂解偏移至較高溫側,但第一階段熱裂解之重量損失及損失速率提高。 |
英文摘要 | Wood powders of Cryptomeria japonica were liquefied with polyhydric alcohol as a solvent. The mixtures of polytetramethylene glycol (PTMG) and liquefied C. japonica with the weight ratio of 10/0, 8/2, 6/4 and 4/6 were used as the raw material of polyol and isophorone diisocyanate (IPDI) was used as the isocyanate. Polyurethane resins (PU) were prepared by reacting polyol with isocyanate with the molar ratio of NCO/OH as 1.5/1 and 2.0/1 by a two-step method. The experimental results showed that PU resin prepared with the NCO/OH molar ratio of 1.5/1 had the viscosity higher than that of 2.0/1. When the weight ratio of PTMG/liquefied C. japonica changed from 10/0 to 8/2, the viscosity of PU resin increased significantly. However, the viscosity obviously decreased in further increasing of the liquefied C. japonica. The PU films containing higher amount of liquefied C. japonica had more amide in their molecular structure and larger weight retention after ethyl acetate dissolving test. However, the tensile strength and break elongation decreased. DMA results showed that PU films containing liquefied C. japonica had a higher phase transition temperature but existed a micro-phase separation in the internal molecular structure. The thermal degradation behavior of PU resin could be separated in three stages. The addition of liquefied C. japonica led the initial thermal degradation shifted to higher temperature but had larger weight loss and faster weight loss rate at the first stage of thermal degradation. |
本系統中英文摘要資訊取自各篇刊載內容。