| 聚氨酯预聚体合成研究 |
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| 引用本文： | 丁马太.聚氨酯预聚体合成研究[J].厦门大学学报(自然科学版),1987(5). |
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| 作者姓名： | 丁马太 |
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| 作者单位： | 厦门大学化学系 |
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| 摘 要： | 研究了聚氨酯预聚体合成过程中,TDI滴加速度、NCO/OH(当量比)和PPG分子量等因素的影响.实验表明,适当延长TDI滴加时间,控制NCO/OH略大于2/1,均有利于制备粘度较小的预聚体;而适当提高NCO/OH,降低PPG分子量,则有利于聚氨酯涂层抗张强度,定伸强度、硬度等物理机械性能的提高,文中着重就实验结果作出理论解释。
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Studies on Synthesis of Urethane Prepolymera |
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| Ding Matai.Studies on Synthesis of Urethane Prepolymera[J].Journal of Xiamen University(Natural Science),1987(5). |
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| Authors: | Ding Matai |
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| Institution: | Dept. of Chem. |
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| Abstract: | Influences of drop-velocity of TDI, NCO/OH(equivalent ratio) and the molecular weight of PPG in the synthesis Process of urethane-prepolymers were studied. Experimental results show that it is to the advantage of the reduction of viscosity of prepolymers to prolongate appropriately the drop-time of TDI or to control NCO/OH to be a little more than 2/1. The results also show that to increase NCO/OH or to reduce the molecular weight of PPG is advantageous for the enhancement of physico-mechanical properties of polyurethane material. Theoretical explanations of the results observed were proposed emphatically. |
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| Keywords: | Polyurethanc Toluene diisocyanate Polypropylene glycol Addition Polymerization Condensation Polymerization |
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