DOSY Experiments to Monitor Block Copolymer Polymerization

Authors

  • Thania S. Jiménez-Martínez Grupo Comex
  • Saúl Romero-Manig Grupo Comex
  • Nuria Esturau-Escofet Universidad Nacional Autónoma de México
  • Manuel Briseño-Terán Grupo Comex

DOI:

https://doi.org/10.29356/jmcs.v55i2.839

Keywords:

Diffusion Ordered NMR Spectroscopy, Pulsed-field-gradient NMR, Block copolymer, Molecular weight.

Abstract

Block copolymers are a class of polymeric materials made by the covalent bonding of at least two macromolecular chains each with a different chemical nature. The performance of these materials is highly dependent on the physical and chemical properties of the constituting blocks, especially with regard to their chemical composition and molecular weight distribution. Usually, the block copolymer molecular weight is determined using Size-Exclusion Chromatography (SEC). In addition to traditional techniques, Diffusion Order SpectroscopY (DOSY) was introduced in the early 90s to obtain polymer composition and molecular weight information. In the present work, we have successfully used DOSY as a method to monitor block copolymer polymerization as well as to account for the SEC results of a typical analysis.

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Author Biographies

Saúl Romero-Manig, Grupo Comex

Centro de Investigación en Polímeros

Nuria Esturau-Escofet, Universidad Nacional Autónoma de México

Facultad de Química, Unidad de Servicios y Apoyo a la Investigación

Manuel Briseño-Terán, Grupo Comex

Centro de Investigación en Polímeros

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Published

2019-04-22

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