【摘要】 粘合剂在现代生活和生产中广泛应用，具有可生物降解、可再生、可逆粘接性能的粘合剂是该领域的研究热点。本文利用相对分子质量为2000左右，碳酸酯含量（CU）分别为28%、33%、45%、51%和66%的聚（碳酸酯-醚）二元醇和乙基纤维素为原料，通过羟基与2-脲基-4[1H]-嘧啶酮异氰酸酯（UPy-NCO）的偶联反应，分别合成了UPy封端的聚（碳酸酯-醚）（UPPC）和UPy侧链官能化的乙基纤维素（UEC）。进一步，通过溶液共混制备了基于四重氢键作用的UPPC/UEC超分子复合物并研究了UPPC的序列结构和含量对超分子复合物粘接性能的影响。当UPPC的质量分数为70%,碳酸酯含量为33%时，超分子复合物（UPPC33%₇/UEC₃）对钢片的粘接强度最高可达7.4 MPa,是单组分UPPC33%粘接强度的3倍。此外，UPPC33%₇/UEC₃对钢片表现出良好的热可逆粘接特性，重复使用6次后粘接强度仅下降10%。更多还原

【Abstract】 Adhesives are indispensable in modern life and production, and adhesives that are biodegradable, sustainable, and reversible adhesive have gained significant momentum. Herein, 2-urea-4[1H]-pyrimidinone terminated poly（carbonate ether）（UPPC） and functionalized ethyl cellulose（UEC） were synthesized via the coupling reaction between 2-urea-4[1H]-pyrimidinone isocyanate（UPy-NCO） and poly（carbonate ether） diol（M_n around 2000, carbonate unit content=28%, 33%, 45%, 51%, and 66%） or ethyl cellulose（M_n=11700）. Through solution blending, supramolecular complexes composed of UPPC and UEC were successfully prepared, and the effects of the structure and content of UPPC on the adhesion properties of the supramolecular complexes were studied. When the content of UPPC33% is 70wt%, the supramolecular complex UPPC33%₇/UEC₃ displays a high adhesion strength of 7.4 MPa on steel, which is three times that of UPPC33%. In addition, UPPC33%₇/UEC₃ displayed reversible adhesive properties in response to heat, and its adhesion strength decreased by only 10% after repeated use for 6 consecutive times.更多还原