環氮丙烷化學於水性聚氨酯架橋改質等 應用研究

The Azetidine Chemistry for Aqueous-based Polyurethane and Other Applications

王世杰(Shih-Chieh Wang)

指導教授 ： 陳幹男

淡江大學/理學院/化學學系博士班/博士(2007年)

https://doi.org/10.6846/TKU.2007.00221

摘要

本論文是以水性聚氨酯樹脂改質為主要目的。傳統水性聚氨酯樹脂分散液屬於線型高分子，且平均分子量並不大，所以樹脂薄膜對於有機溶劑的抵抗性並不佳，所表現的機械強度亦不如傳統溶劑型聚氨酯樹脂，因此，本研究目標乃在合成一系列含環氮丙烷官能基之架橋劑、含三元次乙亞胺官能基之架橋劑、含單元次乙亞胺與異氰酸酯官能基架橋劑與含三元環氧基架橋劑等，並引入水性聚氨酯樹脂當中，使其扮演常溫型架橋劑，進而達到樹脂改質之目的。
各架橋劑的合成，以核磁共振光譜儀與紅外線光譜儀鑑定其產物之確切化學結構；其於聚氨酯內的交聯反應，以模型反應加以驗證之。經架橋硬化所形成網狀交聯形態的聚氨酯樹脂薄膜，其各種性質之變化與比較。在物理性質方面，以膠含量、吸水率、對水損失率、吸乙醇率、對乙醇損失率、接觸角及硬度進行分析比較。在機械性質方面，則以抗張應力與抗張應變進行探討。最後於熱性質分析方面，以熱重分析與動態機械分析加以探討。

關鍵字

環氮丙烷 ； 聚氨酯 ； 自行架橋

並列摘要

In this research, the modification of aqueous-based polyurethane (PU) dispersion is the main target. Because the traditional aqueous-based PU resin is linear polymer and because it has low average molecular weight which causes the traditional aqueous-based PU exhibits poor organic solvent resistant and low mechanical performance.
In this research, a series of azetidinyl-containing curing agent, triaziridinyl-containing curing agent, mono-aziridinyl and mono-isocyanate containing curing agent and tri-oxirane-containing curing agent are synthesized and introduced into aqueous-based PU dispersion to act as the latent curing agent at ambient temperature.
The chemical structures of these synthesized curing agents are identified by FT-IR and FT-NMR. The curing reaction between curing agent and PU is explained by the modeling reaction. The physical properties (such as gel content, water-uptake, degree of alcohol swollen, contact angle, hardness etc.), the tensile strength, the thermal properties of these cured PU resins are evaluated in this research.

並列關鍵字

azetidine ； polyurethane ； self-curing

參考文獻

63. 蕭世明, 中興大學化學工程研究所碩士論文, (2001)

14. H. -J. Ling, G. –N. Chen, K. –N. Chen, Adv. Eng. Materials, 2, 114 (1999)

54. T. Saegusa, Y. Kimura, S. Sawada and S. Kobayashi, Macromolecules, 7, 956 (1974)

55. T. Saegusa, S. Kobayashi, Y. Kimura and H. Ikeda, J. Macromol. Sci., Chem., A9, 641 (1975)

27. E. Testa, L. Fontanella, G. F. Cristiani, and T. Mariani, Helv. Chim. Acta, 42, 2370 (1959)