CAJ | 학술논문

以异佛尔酮二异氰酸酯(IPDI)、聚碳酸酯二醇(PCDL)、二乙醇胺(DEA)、蓖麻油(C．O．)、二羟甲基丙酸(DMPA)为原料,二丁基二月桂酸锡(DBTDL)为催化剂,合成了单端封闭的聚氨酯预聚体,然后将其接枝到一代树枝状大分子聚酰胺-胺(1 G PAMAM)上,合成了一种新型树枝状水性聚氨酯.通过单因素分析法优化出最佳的合成条件：DBTDL 的用量为0．08％,预聚反应温度为80℃,扩链反应温度为75℃, DMPA用量为6％,产物具有良好的水分散性.利用红外光谱(FT-IR)和热失重分析仪(TGA)对产物进行了表征,并用 X 射线衍射(XRD)分析了胶膜的结晶度,还对胶膜的耐水性能和拉伸强度进行了测试,结果表明,制备的树枝状水性聚氨酯的吸水率为12．1％,拉伸强度为16．2 MPa,热分解温度为205℃.
이이불이동이이청산지(IPDI)、취탄산지이순(PCDL)、이을순알(DEA)、비마유(C．O．)、이간갑기병산(DMPA)위원료,이정기이월계산석(DBTDL)위최화제,합성료단단봉폐적취안지예취체,연후장기접지도일대수지상대분자취선알-알(1 G PAMAM)상,합성료일충신형수지상수성취안지.통과단인소분석법우화출최가적합성조건：DBTDL 적용량위0．08％,예취반응온도위80℃,확련반응온도위75℃, DMPA용량위6％,산물구유량호적수분산성.이용홍외광보(FT-IR)화열실중분석의(TGA)대산물진행료표정,병용 X 사선연사(XRD)분석료효막적결정도,환대효막적내수성능화랍신강도진행료측시,결과표명,제비적수지상수성취안지적흡수솔위12．1％,랍신강도위16．2 MPa,열분해온도위205℃.
The polyurethane prepolymer was prepared in which the isophorone diisocyanate (IPDI),polycarbon-ate glycol (PCDL),diethanolamine (DEA),castor oil (C.O.)and 2,2-dimethylol propionic acid (DMPA)were as raw materials,the dibutyltin dilaurate(DBTDL)was as catalyst.The polyurethane prepolymer was grafted on 1 .0 generation of polyamide-amine (PAMAM),and then a new type of dendritic waterborne polyurethane was synthesized.The synthesis conditions were optimized by single factor analysis method.The optimum condi-tions were that the prepolymerization reaction temperature was 80 ℃,the temperature of chain extension reac-tion was 75 ℃,the dosage of DBTDL was 0.08% and the dosage of DMPA was 6%.The product took on good water dispersibility.The products were characterized by Fourier transform infrared spectroscopy (FT-IR)and thermogravimetric analysis (TGA),its crystallization degree was determined by XRD and the water resistance and tensile strength of the film were tested too.The results showed that its bibulous rate was 12.1%,the ten-sile strength was 16.2 MPa and the thermal decomposition temperature was 205 ℃.