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Amphiphilic block copolymer synthesis via RAFT polymerization and their self-assembly behavior

Zhao, Wei

2014

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  • Título:
    Amphiphilic block copolymer synthesis via RAFT polymerization and their self-assembly behavior
  • Autor: Zhao, Wei
  • Assuntos: Addition polymerization ; Amphiphilic block copolymer ; Amphiphilic block copolymer Self-assembly RAFT polymerization ; Block copolymers ; RAFT polymerization ; Self-assembly
  • Descrição: Nanoscience and nanotechnology have gained great attention in the past few decades due to their potential applications in various fields. Compared to the widely investigated inorganic and organic nanomaterials, studies on the properties and applications of highly functional nanostructured polymeric materials such as nanoparticles are relatively sparser, mainly due to the limitation of the current preparation methods that do not provide the materials quantities required for in depth studies of their properties and for their applications. Finding a simple and feasible method for the production of well-defined polymeric nanomaterials in a relatively large scale is therefore highly desirable. Broadly, there are two main strategies for the bottom-up preparation of polymeric nanoparticles with multiple functionalities: self-assembly of block copolymers in a selective solvent and heterogeneous polymerization. For block copolymer synthesis, living/controlled radical polymerization techniques such as the RAFT process are highly versatile methods to prepare polymers with well-controlled macromolecular architectures, predetermined molecular weight and narrow molecular weight distribution. In this work, we have investigated two methods to prepare amphiphilic block copolymers with controlled architecture in both homogeneous and heterogeneous systems by RAFT polymerization and established their self assembly behaviors in either selective solvent (aqueous) or in situ by polymerization-induced self assembly (PISA). Nano-objects with various morphologies were obtained by both of the above strategies. A deep analysis of the various reaction pathways, including side reactions, involved in the synthesis process of the polymeric chains provides a crucial understanding of the prevailing mechanisms in particle formation. Source: TROVE
  • Data de criação/publicação: 2014
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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