頁籤選單縮合
題 名 | 聚胺基甲酸酯樹脂/聚矽酸奈米微粒有機-無機混成材料之性質=Properties of Organic-Inorganic Hybrids Prepared from Polyurethane Resins and Polysilicic Acid Nanoparticles |
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作 者 | 高毓斌; 李文昭; | 書刊名 | 中華林學季刊 |
卷 期 | 47:3 2014.09[民103.09] |
頁 次 | 頁311-323 |
分類號 | 440.34 |
關鍵詞 | 奈米微粒; 聚胺基甲酸酯樹脂; 聚矽酸; 有機-無機混成材料; 樹脂薄膜; Nanoparticles; Organic-inorganic hybrids; Polyurethane resins; Polysilicic acid; Resin film; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以聚四甲基醚二醇(Polytetramethylene glycol; PTMG)及異佛爾酮二異氰酸酯(Isophorone diisocyanate, IPDI)為原料,在NCO/OH官能基莫耳比1.5/1.0及2.0/1.0條件下合成聚胺基甲酸酯樹脂(Polyurethane resin; PU),另以偏矽酸鈉藉由水解及縮合反應製備聚矽酸(Polysilicic acid; PSA)奈米微粒,並將此PU樹脂與PSA微粒混合製備PU/PSA有機-無機混成材料,探討PSA添加對PU樹脂性質之影響。由結果顯示,PU樹脂合成時採用NCO/OH莫耳比2.0者,其樹脂薄膜之耐溶劑重量保留率、引張強度、儲存模數及玻璃轉移溫度均高於莫耳比1.5者。添加1%及3%PSA微粒可提高NCO/OH莫耳比2.0之PU薄膜之引張強度,然對莫耳比1.5之PU樹脂則無明顯影響。動態熱機械分析(Dynamic mechanical analysis; DMA)顯示,添加PSA微粒對PU樹脂薄膜之黏彈性並無明顯影響,然可提高莫耳比1.5者之儲存模數。熱重分析(Thermal gravimetric analysis; TGA)顯示,PU樹脂之熱裂解可區分成三階段,添加PSA微粒使各階段起始熱裂解之溫度往高溫側偏移,且隨PSA微粒添加量增加,熱抵抗性能提高。 |
英文摘要 | Polyurethane resins (PU) were synthesized by reacting polytetramethylene glycol (PTMG) with isophorone diisocyanate (IPDI) with the NCO/OH molar ratio of 1.5/1.0 and 2.0/1.0. Nanoparticles of polysilicic acid (PSA) were prepared from sodium metasilicate by hydrolysis and condensation. PU resins were blended with PSA nanoparticles to make organic inorganic hybrids, and the influence of PSA on the properties of PU resins was investigated. The results showed that PU films with the NCO/OH molar ratio of 2.0 had higher weight retention of solvent-resistance, tensile strength, storage modulus, and glass transition temperature than that of 1.5. Adding 1% and 3% of PSA nanoparticles could increase the tensile strength of PU films with NCO/OH molar ratio of 2.0, while it was useless for that of 1.5. Dynamic mechanical analysis (DMA) results showed that the viscoelastic behavior of PU films had not significant influenced by PSA nanoparticles. However, the storage modulus of PU films with the NCO/OH molar ratio of 1.5 could be increased. Thermal gravimetric analysis (TGA) results showed that the thermal degradation of PU resins included three stages. Adding PSA nanoparticles led the onset temperature of each stage of thermal degradation shifted to higher temperature. The more PSA nanoparticles added the higher heat-resistance would be. |
本系統中英文摘要資訊取自各篇刊載內容。