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作 者:刘丹[1] 曾少敏[1] 胡虔[1] 徐祖顺[1,2]
机构地区:[1]湖北大学材料科学与工程学院 [2]功能材料绿色制备与应用省部共建教育部重点实验室,湖北武汉430062
出 处:《高分子材料科学与工程》2010年第4期21-24,共4页Polymer Materials Science & Engineering
基 金:湖北省科技厅创新团队基金资助
摘 要:以异佛尔酮二异氰酸酯(IPDI)、聚碳酸酯二醇(PCDL)、3,3′,4,4′-二苯甲酮二酐(BTDA)和聚醚胺(ATA)为原料,采用A2+B3法合成了具有高度支化结构的聚氨酯-酰亚胺(HBPUI)。通过红外光谱(FT-IR)对结构进行了表征。采用旋转黏度计、差式扫描量热分析(DSC)、热重分析(TGA)、电子拉力机对产物的性能进行了测试。结果表明,与线性聚氨酯-酰亚胺(LPUI)相比,HBPUI具有较低的黏度和较高的Tg;HBPUI的热分解温度达到300℃以上,与高度支化聚氨酯相比,热稳定性得到明显提高;力学测试表明,HBPUI的拉伸强度随硬段含量和[A2]/[B3]的增大而增大,而断裂伸长率呈下降趋势。Highly branched poly(urethane-imide) (HBPUI) was synthesized via A2+B3 approach using isophorone diisocyante (IPDI),polycarbonatediol (PCDL),3,3',4,4'-benzophen-onetetracarboxylic dianhydride (BTDA) and poly(oxyalkylene) triamine (ATA) as materials. The structure of the products was characterized by Fourier transform infrared spectroscopy(FT-IR). The properties were measured by rotational rheometer,differential scanning calorimetry(DSC),thermal gravimetric analysis(TGA) and tensile tests. The HBPUI shows lower viscosity but a higher Tg than that of line poly(urethane-imide)(LPUI). Thermal gravimetric analysis indicates that the thermal degradation of poly(urethane-imide) occurs above 300 ℃,which is higher in comparison with conventional highly branched polyurethane(HBPU),confirming that the introduction of imide function improves the thermal stability of HBPU. Tensile tests reveal that the tensile strength of HBPUI is obviously improved by increasing the content of hard segment and the molar ratio of [A2]/[B3]. however,the elongation at break displays a opposite trend.
分 类 号:TQ323.8[化学工程—合成树脂塑料工业]
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