Simple method to analyze the molecular weight of polymers using cyclic voltammetry

Hae Young Kim, Jinhee Lee, Sua Song, Inah Kang, Sang Youl Kim, Byung Kwon Kim

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In this study, we have developed a novel electrochemical method based on cyclic voltammetry to measure the molecular weight of polymers. As the molecular weight of a polymer increases, the viscosity of the corresponding polymer solution also increases. This hinders the diffusion of redox species in the solution, resulting in a proportional decrease in the steady-state current. These changes allow us to measure the molecular weight of a polymer in solution more rapidly and easily than when using conventional methods. Herein, we have verified the proposed method by applying it to measure the molecular weight of poly(methyl methacrylate) in solutions.

Original languageEnglish
Article number129305
JournalSensors and Actuators, B: Chemical
Volume330
DOIs
StatePublished - 1 Mar 2021

Bibliographical note

Funding Information:
This work was supported by the Basic Science Research Program through the National Research Foundation of Korea, which is funded by the Ministry of Science and ICT (NRF-2018R1C1B6008668). This work was also directly supported by the National Research Foundation of Korea (NRF-2015R1A2A1A10055222 and NRF-2019R1H1A2039753).

Funding Information:
This work was supported by the Basic Science Research Program through the National Research Foundation of Korea, which is funded by the Ministry of Science and ICT ( NRF-2018R1C1B6008668 ). This work was also directly supported by the National Research Foundation of Korea ( NRF-2015R1A2A1A10055222 and NRF-2019R1H1A2039753 ).

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

  • Cyclic voltammetry
  • Dynamic viscosity
  • Molecular weight detection
  • Poly(methyl methacrylate)
  • Stokes-Einstein equation

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