两亲性杂侧链聚合物刷的合成及其乳化功能

发布时间：2018-03-05 04:31

本文选题：聚合物刷　切入点：耦合法　出处：《高分子学报》2017年09期 　论文类型：期刊论文

【摘要】：报道了一种随机高密度接枝亲水、疏水聚合物侧链的刷形两亲性聚合物.首先,结合可逆加成-断裂链转移(RAFT)聚合和后修饰方法,得到含叠氮侧基的聚甲基丙烯酸缩水甘油酯(PGMA-N3)作为主链;再分别合成端炔基聚苯乙烯(PS)和端炔基聚环氧乙烷(PEO),然后通过铜催化的叠氮-炔环加成反应,将疏水性PS和亲水性PEO同时高效的接到PGMA主链上,制得两亲性杂侧链的聚合物刷.由凝胶渗透色谱(SEC)分析得知,在主链叠氮基团与两侧链总炔基的摩尔投料比为1∶1的条件下,PS和PEO的接枝效率很高,都大于90%.通过调节主链长度和2种侧链的投料比,获得不同组成的聚合物刷.通过等质量的甲苯/水混合体系,考察两亲性聚合物刷的乳化能力,发现主链聚合度为100,PS∶PEO比例为70∶30的聚合物刷表现出最佳的乳化性能.
[Abstract]:A brush-amphiphilic polymer with random high density grafted hydrophilic and hydrophobic side chains is reported. Firstly, the method of polymerization and post-modification is combined with reversible addition-break chain transfer (Raft) polymerization. Poly (glycidyl methacrylate) containing azide side group (PGMA-N3) was obtained as the main chain, and then the end alkynyl polystyrene (PSN) and the alkynyl terminated poly (ethylene oxide) (PEOO) were synthesized, respectively, and then the copper-catalyzed azido-acetylene cycloaddition reaction was carried out. The hydrophobic PS and hydrophilic PEO were efficiently connected to the main chain of PGMA at the same time, and the polymer brushes of amphiphilic hetero-side chain were prepared. The grafting efficiency of PS and PEO is higher than 90 when the molar ratio of azide group to total alkynyl of the two chains is 1: 1. By adjusting the length of the main chain and the feed ratio of the two kinds of side chains, the grafting efficiency of PS and PEO is higher than 90%. The emulsifying ability of amphiphilic polymer brushes was investigated by using a mixture of toluene and water with different compositions. It was found that the polymer brushes with a main chain polymerization degree of 100% PS: PEO ratio of 70: 30 exhibited the best emulsifying properties.
【作者单位】：高分子物理与化学国家重点实验室中国科学院化学研究所;中山大学材料科学与工程学院聚合物复合材料及功能材料教育部重点实验室;
【基金】：国家自然科学基金(基金号51533009)重点资助项目广东省引进创新创业团队(基金号2013S086)资助项目
【分类号】：O631

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