陰離子型水性聚氨酯之製備與性質探討

本研究目的為建立水性聚氨酯合成並加以探討物性之資料庫。研究依多元醇分為兩種系統：其一、以不同分子量之聚丙二醇相混，其二、以聚四亞甲基醚二醇及聚酯相混。兩種系統皆利用丙酮法合成陰離子型水性聚氨酯，並分別探討兩種不同水性聚氨酯之物理性質。在機械性質測試中，以不同分子量之聚丙二醇相混之水性聚氨酯，其延伸率會隨大分子量的聚丙二醇添加比例增加而下降，斷裂力量則反之；以聚四亞甲基醚二醇及聚酯相混之水性聚氨酯則沒有明顯趨勢。水性聚氨酯使用粒徑分析儀測量粒徑尺寸，可觀察到粒徑大小與添加的多元醇分子量大小成正比關係；使用熱重分析儀分析，其兩系統之初始裂解溫度皆落在200℃~220℃之間，最後使用差示掃描量熱儀儀器測量以聚四亞甲基醚二醇及聚酯相混之水性聚氨酯，其熔點大約為17℃~21℃且會因聚酯比例上升而出現結晶峰。

關鍵字

水性聚氨酯；陰離子型；丙酮法；聚丙二醇；聚四亞甲基醚二醇

並列摘要

The synthesis of waterborne polyurethane and the properties of it are discussed in this study. A database is further established according to the results which had collected during the research. The study is divided into two systems based on polyol: one is mixed with polypropylene glycol of different molecular weight, and the other is mixed with polytetramethylene ether glycol and polyester. Both systems use an acetone method to synthesize anionic waterborne polyurethanes and explore the physical properties of two different waterborne polyurethanes.. In the mechanical property test, the elongation of the water-based polyurethane mixed with polypropylene glycol of different molecular weights will decrease with the increase of the proportion of the polypropylene glycol with a large molecular weight, and the breaking strength will be reversed; And there is no clear trend for the other aqueous polyurethanes. The particle size was measured by dynamic light scattering, it can be observed that the particle size is proportional to the molecular weight of the added polyol. The analysis of the thermogravimetric analysis shows that the initial cracking temperatures of both systems fall between 200 °C and 220°C. and finally using a differential scanning calorimeter instrument to measure the waterborne polyurethane mixed with polytetramethylene ether glycol and polyester, the melting point of which is about 17 ° C ~ 21 ° C and crystallization peak will appear due to an increase in the proportion of polyester.

並列關鍵字

Waterborne polyurethane ； Anionic ； acetone method ； Polypropylene glycol ； Polytetramethylene ether glycol

參考文獻

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