Preparation of associating multiblock copolymer electrolytes mediated by radical addition–fragmentation chain transfer (RAFT) technique has been evaluated and reported in this investigation. The synthesization of copolymers was performed at room temperature in 1,4-dioxane using redox catalyst: tert-butyl hydroperoxide and ascorbic acid as initiator. The copolymers are composed of a large hydrophilic block formed with acrylic acid and ethyl acrylate and a short hydrophobic segment of lauryl acrylate. A symmetrical RAFT chain transfer agent was used in order to incorporate a greater number of blocks by chain extension of macroagent, triblock and pentablock copolymers. Once obtained, the resultant polymers were thoroughly characterized by nuclear magnetic resonance, size exclusion chromatography, differential scanning calorimetry and rheometry with the aim to determine the structure–property relationship. The influence of hydrophobic length was demonstrated and played a significant role in the rheological properties of copolymers.

中文翻译：

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多嵌段缔合共聚物的合成、表征和流变性能的 RAFT 技术

本研究评估并报告了由自由基加成-断裂链转移 (RAFT) 技术介导的缔合多嵌段共聚物电解质的制备。共聚物的合成在室温下在 1,4-二恶烷中使用氧化还原催化剂：叔丁基过氧化氢和抗坏血酸作为引发剂进行。该共聚物由丙烯酸和丙烯酸乙酯形成的大亲水嵌段和丙烯酸月桂酯的短疏水链段组成。使用对称的 RAFT 链转移剂以通过大分子试剂、三嵌段和五嵌段共聚物的链延长来引入更多的嵌段。一旦获得，所得聚合物通过核磁共振、尺寸排阻色谱、差示扫描量热法和流变测定法，目的是确定结构-性能关系。疏水长度的影响被证明并在共聚物的流变性能中发挥了重要作用。