Gel Permeation Chromatography Analysis of Polysiloxanes

Gel permeation chromatography (GPC) is at the center of the characterization of polymers. This characterization method is performed across the duration of the material’s lifecycle. This process follows the material after the first polymerization, before and after it is purified, after post-polymerization modification, in the final product, and after degradation, failure, and/or aging.

The main aim of using GPC to analyze polymers is to characterize their molar mass distributions and molecular weights. Identifying the molecular weight is driven by a number of motivations, such as estimating how the properties of a product will be impacted and understanding the effectiveness of a reaction.

Along with molecular weight, researchers aim to understand changes in the sample’s structure, compositional changes, solution viscosity, branching, and size. The OMNISEC multi-detection GPC system delivers this data with the highest degree of sensitivity.

A fusion of light scattering, refractive index, viscometer, and UV/vis spectrometer detectors are used in the OMNISEC to deliver a more thorough characterization compared to the relative molecular weight results achieved when using RI detection alone.

Polysiloxanes are a complex material to investigate using GPC, because when the most widespread polysiloxane, polydimethylsiloxane (PDMS), is analyzed in the regular organic solvent for GPC, THF, the RI peaks are very small and are not found in the light scattering detectors.

The PDMS signals in both of these detectors are significant when analyzed in toluene. This is caused by the material’s refractive index increment (dn/dc) (please read this article for additional information on the dn/dc value).

Polysiloxanes are commonly employed in a variety of applications because they are hydrophobic, show high chemical stability, are unreactive, have strong electrical insulation, and can be used to produce various types of material, for example adhesives, foams, gels, lubricants, and elastomers. The chemical functionality integrated into a polysiloxane can be selected to impart particular properties to the polysiloxane.

Download the Full Whitepaper

This information has been sourced, reviewed and adapted from materials provided by Malvern Panalytical.

For more information on this source, please visit Malvern Panalytical.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Malvern Panalytical. (2022, December 21). Gel Permeation Chromatography Analysis of Polysiloxanes. AZoM. Retrieved on February 22, 2024 from https://www.azom.com/article.aspx?ArticleID=19702.

  • MLA

    Malvern Panalytical. "Gel Permeation Chromatography Analysis of Polysiloxanes". AZoM. 22 February 2024. <https://www.azom.com/article.aspx?ArticleID=19702>.

  • Chicago

    Malvern Panalytical. "Gel Permeation Chromatography Analysis of Polysiloxanes". AZoM. https://www.azom.com/article.aspx?ArticleID=19702. (accessed February 22, 2024).

  • Harvard

    Malvern Panalytical. 2022. Gel Permeation Chromatography Analysis of Polysiloxanes. AZoM, viewed 22 February 2024, https://www.azom.com/article.aspx?ArticleID=19702.

Ask A Question

Do you have a question you'd like to ask regarding this article?

Leave your feedback
Your comment type
Submit
Azthena logo

AZoM.com powered by Azthena AI

Your AI Assistant finding answers from trusted AZoM content

Azthena logo with the word Azthena

Your AI Powered Scientific Assistant

Hi, I'm Azthena, you can trust me to find commercial scientific answers from AZoNetwork.com.

A few things you need to know before we start. Please read and accept to continue.

  • Use of “Azthena” is subject to the terms and conditions of use as set out by OpenAI.
  • Content provided on any AZoNetwork sites are subject to the site Terms & Conditions and Privacy Policy.
  • Large Language Models can make mistakes. Consider checking important information.

Great. Ask your question.

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.