经两步法合成了螺环原碳酸酯膨胀单体3,9-二羟甲基-3,9-二乙基-1,5,7,11-四氧杂螺环[5.5]十一烷,用2,4-甲苯二异氰酸酯(TDI)与聚丙二醇(PPG)合成端异氰酸酯基的聚氨酯预聚物,并使二者共聚制备新型膨胀单体预聚物.采用红外光谱、核磁共振、元素分析对产物进行了表征.将该膨胀单体预聚物加入到N,N'-(4,4'-二苯甲烷)双马来酰亚胺(BDM)/3,3'-二烯丙基4,4'-二苯丙烷(DABPA)共混体系中,减少了BMI/DABPA体系固化过程中的体积收缩.
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