Bifunctional RAFT Agent Directed Preparation of Polymer/Graphene Oxide Composites,Macromolecular Rapid Communications

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Bifunctional RAFT Agent Directed Preparation of Polymer/Graphene Oxide Composites
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2021-09-10 , DOI: 10.1002/marc.202100460
Tina Hsia ₁ , Jing Wan ₁ , Bo Fan ₁ , San H Thang ₁

Affiliation

Polymer/graphene oxide (GO) composites, which combine the physical properties of GO and the processability of polymers, are of increasing interest in a variety of applications ranging from conductive foams, sensors, to bioelectronics. However, the preparation of these composites through physical blending demands the polymers with functional groups that interact strongly with the GO. Here the design and synthesis of a new bifunctional reversible addition–fragmentation chain transfer (RAFT) agent are demonstrated, which allows the synthesis of polymers with predetermined molecular weights and low dispersibilities (Ð), while having functionalities at both polymer termini that allow strong binding to GO. To access polymers with diverse thermal and mechanical properties, acrylonitrile–styrene–acrylate (ASA) copolymers with different types of acrylates, both short and long side chains, are synthesized under the control of the bifunctional RAFT agent. Furthermore, the strong binding between GO and the synthesized polymers is verified and explored to prepare polymer/GO composites with diverse tensile strengths and conductivity in the range of semiconductors. Overall, this novel RAFT agent is expected to expand the utility of polymer/GO composites by providing well-defined polymers with tunable properties and strong binding with GO.

中文翻译：

双功能RAFT剂定向制备聚合物/氧化石墨烯复合材料

聚合物/氧化石墨烯 (GO) 复合材料结合了 GO 的物理特性和聚合物的可加工性，在从导电泡沫、传感器到生物电子学的各种应用中越来越受到关注。然而，通过物理共混制备这些复合材料需要具有与 GO 强烈相互作用的官能团的聚合物。这里展示了一种新的双功能可逆加成-断裂链转移 (RAFT) 试剂的设计和合成，它允许合成具有预定分子量和低分散性的聚合物 ( Ð)，同时在聚合物的两个末端都具有允许与 GO 强结合的功能。为了获得具有不同热性能和机械性能的聚合物，在双功能 RAFT 试剂的控制下合成了具有不同类型丙烯酸酯的丙烯腈 - 苯乙烯 - 丙烯酸酯（ASA）共聚物，包括短侧链和长侧链。此外，GO与合成聚合物之间的强结合得到验证和探索，以制备在半导体范围内具有不同拉伸强度和导电性的聚合物/GO复合材料。总体而言，这种新型 RAFT 试剂有望通过提供具有可调性质和与 GO 强结合的明确定义的聚合物来扩展聚合物/GO 复合材料的实用性。

更新日期：2021-11-04

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