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Precise Control of Both Dispersity and Molecular Weight Distribution Shape by Polymer Blending

Whitfield, Richard ; Truong, Nghia P. ; Anastasaki, Athina

Angewandte Chemie (International ed.), 2021-08, Vol.60 (35), p.19383-19388 [Periódico revisado por pares]

Weinheim: Wiley Subscription Services, Inc

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  • Título:
    Precise Control of Both Dispersity and Molecular Weight Distribution Shape by Polymer Blending
  • Autor: Whitfield, Richard ; Truong, Nghia P. ; Anastasaki, Athina
  • Assuntos: Block copolymers ; Chemical synthesis ; Dispersion ; dispersity ; Molecular weight ; Molecular weight distribution ; molecular weight distribution shape ; polymer blending ; Polymers
  • É parte de: Angewandte Chemie (International ed.), 2021-08, Vol.60 (35), p.19383-19388
  • Notas: These authors contributed equally to this work.
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  • Descrição: The breadth and the shape of molecular weight distributions can significantly influence fundamental polymer properties that are critical for various applications. However, current approaches require the extensive synthesis of multiple polymers, are limited in dispersity precision and are typically incapable of simultaneously controlling both the dispersity and the shape of molecular weight distributions. Here we report a simplified approach, whereby on mixing two polymers (one of high Đ and one of low Đ), any intermediate dispersity value can be obtained (e.g. from 1.08 to 1.84). Unrivalled precision is achieved, with dispersity values obtained to even the nearest 0.01 (e.g. 1.37→1.38→1.39→1.40→1.41→1.42→1.43→1.44→1.45), while maintaining fairly monomodal molecular weight distributions. This approach was also employed to control the shape of molecular weight distributions and to obtain diblock copolymers with high dispersity accuracy. The straightforward nature of our methodology alongside its compatibility with a wide range of polymerisation protocols (e.g. ATRP, RAFT), significantly expands the toolbox of tailored polymeric materials and makes them accessible to all researchers. Tuning dispersity and molecular weight distribution shape significantly impacts polymer properties. Herein, we report a straight‐forward approach, wherein blending just two polymers allows for unrivalled precision in tuning molecular weight distributions.
  • Editor: Weinheim: Wiley Subscription Services, Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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