【摘要】 用“二步法”合成了含二氮杂奈酮结构聚氨酯-酰亚胺(PUI-DHPZ)嵌段聚合物。通过TG、力学强度以及溶解性分析测试,研究了PUI-DHPZ聚合物试样的性能及二酐含量对其的影响。结果表明,PUI-DHPZ聚合物具有良好的热性能,其中半寿温度比聚氨酯(PU)提高了51℃;拉伸强度随二酐含量变化呈现出先增大后减小的趋势,以PUI-DHPZ-50拉伸强度最大,扯断伸长率呈单一下降趋势;聚合物在强极性有机溶剂中有较好的溶解性能。更多还原

【Abstract】 In this paper,a series of novel polyurethane-imides containing phthalazinone moieties were synthesized by two-step method.The thermal property,mechanical property and solvable property were investigated by several means.The results of TG showed that the thermal property of the samples is improved obviously beyond PU,and T5% has a increase of 51℃.With the change of the contents of the imide-chain,the tensile strength is advanced in the first stage and then decreased,but the breaking elongation is single reduced.The PUI-DHPZ can soluble in strong polar solvents.更多还原