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題名 | 溶膠-凝膠法製備聚胺基甲酸酯/矽氧有機-無機混成材料之性質=Properties of Polyurethane Resin/Silica Organic-Inorganic Hybrids Prepared with Sol-Gel Process |
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作者 | 高毓斌; 李文昭; Kao, Yu-pin; Lee, Wen-jau; |
期刊 | 中華林學季刊 |
出版日期 | 20150900 |
卷期 | 48:3 2015.09[民104.09] |
頁次 | 頁295-304 |
分類號 | 467.4 |
語文 | chi |
關鍵詞 | 有機無機混成材料; 聚胺基甲酸酯; 樹脂薄膜; 溶膠-凝膠法; Organic-inorganic hybrids; Polyurethane resins; Resin films; Sol-gel process; |
中文摘要 | 聚胺基甲酸酯樹脂(Polyurethane resins; PU)為重要的有機合成樹脂之一,其加工性良好,且具備多樣化之性能,然有耐熱性不足之缺點;而無機材料則具備高熱抵抗定性。溶膠-凝膠製程為結合有機-無機材料的一種方法,本研究將透過溶膠-凝膠法製備PU-矽氧混成材料,並探討無機矽氧對PU樹脂性能之影響。研究中將聚四甲基醚二醇(Polytetramethylene glycol; PTMG)與異佛爾酮二異氰酸酯(Isophorone diisocyanate, IPDI)於NCO/OH官能基莫耳比2/1條件下反應合成PU樹脂,再將此PU樹脂與四乙基矽氧烷(Tetraethoxysilane; TEOS)以不同重量比例混合製作PU-矽氧有機-無機混成材料。由試驗結果得知,TEOS可在PU樹脂中進行水解及縮合反應而形成Si-O-Si結構。隨矽氧結構重量比提高,PU/矽氧混成樹脂薄膜之拉伸強度降低,破壞伸長率增加。DMA結果顯示PU/矽氧混成樹脂薄膜具備半結晶構造,在TEOS添加量5%時有較大之剛性。TGA結果顯示矽氧結構可提高PU樹脂之熱安定性。 |
英文摘要 | Polyurethane resin (PU) is one of the most important organic synthetic resins which is easily be procesing and has varietal properties. However, it has the drawback of insufficient heat resistance. On the other hand, inorganic materials have the characteristic of high heat resistance. Sol-gel process is a method to combine the organic and inorganic materials. In this study, the PU/silica hybrids were prepared by the sol-gel process and the influence of inorganic silica on the properties of PU resin were investigated. PU resin was synthesized by reacting polytetramethylene glycol (PTMG) with isophorone diisocyanate (IPDI) with the NCO/ OH molar ratio of 2/1. The PU/silica organic-inorganic hybrids were made by mixing PU resin and tetraethoxysilane with different weight ratios. The results showed that TEOS could undergo a hydrolysis and condensation reaction to form the Si-O-Si structure in PU solution. Increasing the weight ratio of silica, the tensile strength of PU/silica organic-inorganic hybrids films decreased, whereas the tensile elongation increased. DMA results showed that PU/silica hybrid films had the semicrystalline structure and had a higher stiffness when 5% of TEOS added. TGA results showed that the thermal stability of PU resins could be improved as the structure of silica increased. |
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