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    高翔, 罗静, 钱佳怡, 梁雪, 张一帆, 李小杰, 陈明清. 聚乙二醇型超支化聚酯胺的制备及表征[J]. 功能高分子学报, 2020, 33(2): 187-193. doi: 10.14133/j.cnki.1008-9357.20190225002
    引用本文: 高翔, 罗静, 钱佳怡, 梁雪, 张一帆, 李小杰, 陈明清. 聚乙二醇型超支化聚酯胺的制备及表征[J]. 功能高分子学报, 2020, 33(2): 187-193. doi: 10.14133/j.cnki.1008-9357.20190225002
    GAO Xiang, LUO Jing, QIAN Jiayi, LIANG Xue, ZHANG Yifan, LI Xiaojie, CHEN Mingqing. Preparation and Characterization of Hyperbranched Poly(amino-ester) with Poly(ethylene glycol)[J]. Journal of Functional Polymers, 2020, 33(2): 187-193. doi: 10.14133/j.cnki.1008-9357.20190225002
    Citation: GAO Xiang, LUO Jing, QIAN Jiayi, LIANG Xue, ZHANG Yifan, LI Xiaojie, CHEN Mingqing. Preparation and Characterization of Hyperbranched Poly(amino-ester) with Poly(ethylene glycol)[J]. Journal of Functional Polymers, 2020, 33(2): 187-193. doi: 10.14133/j.cnki.1008-9357.20190225002

    聚乙二醇型超支化聚酯胺的制备及表征

    Preparation and Characterization of Hyperbranched Poly(amino-ester) with Poly(ethylene glycol)

    • 摘要:Mn=250的聚乙二醇二丙烯酸酯为A2单体(含有两个A基因的单体,其余类推),N-乙基乙二胺为B'B2单体,利用丙烯酸酯基和胺基的迈克尔加成聚合反应,一锅法合成了表面含丙烯酸酯键、骨架含聚乙二醇(PEG)、内部含叔胺的具有三维椭球状结构的超支化聚酯胺,并研究了其聚合动力学。利用咪唑对超支化聚酯胺进行改性,并初步研究了咪唑改性的超支化聚酯胺的pH响应性和水溶性。利用核磁共振氢谱、红外光谱、凝胶渗透色谱、GPC-MALLS多角度激光散射系统表征了超支化聚酯胺的分子结构和化学组成。结果表明:聚乙二醇链段的引入能够赋予超支化聚酯胺水溶性;咪唑的引入有利于提高超支化聚酯胺的pH响应性。

       

      Abstract: Hyperbranched poly(amino-ester)s with the surface containing acrylate bonds, backbone containing poly(ethylene glycol) (PEG), and interior containing tertiary amines have been synthesized via an one-step route associated with the Michael addition polymerization of trifunctional amine, 1-amino-2-(ethylamino)ethane (B'B2-type monomer), and a double molar diacrylate, poly(ethylene glycol) diacrylate (A2-type monomer). The hyperbranched poly(amino-ester) was modified with imidazole by Michael addition reaction of acrylate in hyperbranched poly(amino-ester)s and amine in imidazole. The polymerization kinetics of hyperbranched poly(amino-ester) was studied by 1H-NMR. The chemical structures of these hyperbranched polymers were confirmed by 1H-NMR, GPC and FT-IR. Results showed that the molecular weight of the hyperbranched poly(amino-ester) modified with imidazole was 1.42×103, and the polydispersity index(PDI) was 1.05. The water solubility and pH responsiveness of the hyperbranched polymers were investigated by Zeta potential analyzer. Results demonstrated that the hyperbranched polymers showed excellent water solubility due to the presence of PEG backbone. Additionally, the hyperbranched poly(amino-ester) modified with imidazole has numerous tertiary amines which make the polymer carry more charges than the hyperbranched poly(amino-ester), therefore offering it with more sensitive pH responsiveness.

       

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