中文摘要：

在羟基／异氰酸酯基官能团比4：1的条件下，通过超支化聚合物Boltom H20（HPE）与Upy（ureidopyrimidinone）的反应，合成了带有四重氢键单元的改性超支化聚合物HPE-1．采用核磁共振仪及红外分析仪测定了HPE-1的结构．由于分子间强的相互作用，HPE-1在熔融状态下可拉丝，而HPE不能．由于分子中含有亲水的羟基和疏水的Upy基元，HPE-1在水中能够自组装成球状聚集体．在酸性溶液中聚集体变大，而在碱性溶液中聚集体破坏，这为制备敏感性材料提供了途径．

英文摘要：

A hyperbranched polymer （HPE-I） with quadruple hydrogen bonding units was prepared through reacting Boltoru H20 （HPE） with ureidopyrimidinone （Upy） at hydroxyl and isocyanate group ratio of 4 ： 1. The structure of HPE-I was characterized by l H-NMR and IR. The melting HPE-I can form long fibers under pulling due to the strong interaction of the molecules, but HPE can＇t. With both hydrophilic hydroxyl groups and hydrophobic Upy units ,HPE-I self-assembled into spherical aggregates in water. The aggregate become larger in acidic solutions, but dissociate under basic conditions, which provides a way for preparing sensitive material.