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The physical and even the chemical properties of a polymer in a final manufactured product can be closely related to the polymer structure.

Types of polymer structure:

  • Linear
  • Random branched
  • Comb structure
  • Starburst polymers or dendrimers
  • Copolymers
  • Cross-linked

Multi-detector SEC, such as the TDA, can be used to determine a number of the factors that determine structure:

  • Branching ratio
  • Branching frequency
  • Molecular density / Intrinsic Viscosity
  • Copolymer composition
  • Backbone modification

Structure is determined using a combination of an intrinsic viscosity detector that is sensitive to density, and a light scattering detector that provides molecular weight. These parameters are used to construct a Mark – Houwink plot from which a range of structural information can be deduced.

Application example:
Acrylonitrile-butadiene copolymers, commonly called nitrile rubbers (NBR), are used widely for adhesive compounding, and gloves used for examination and cleaning.

The composition of the copolymers, the polymer cross-linking and branching as well as the molecular weight of NBR affect the macroscopic properties of NBR such as flexibility and puncture resistance.

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General Instrument Care of the Viscotek TDAmax GPC/SEC system Technical Note (English)

This technical note details information about maintaining Viscotek GPC/SEC systems to maximize reliability, prevent damage, reduce downtime, recognise imminent issues and minimise service visits

From 0 to 60 – Novel polymer applications in the automotive industry Webinar - Recorded (English)

There is a strong global trend in automotive design that features a continuous increase in the use of conventional, performance, and novel polymeric materials. This is a result of weight savings, design flexibility, and ease of fabrication offered by...

Viscotek HT-GPC,Viscotek systems,Viscotek TDAmax,Viscotek DSV,Viscotek range
Date recorded:
September 3 2015

Principles of Triple Detection GPC/SEC Whitepaper (English)

Triple detection GPC/SEC combines measurements from multiple detectors to offer not only increased amounts of data, but also information, which is available thanks to the combination of different detectors and would not be obtainable using the indivi...

Characterization of IgG monomers & their aggregates Application Note (English)

Two antibody samples were characterized using column calibration and multi-detection SEC, and the results compared to show how multi-detection SEC provides more accurate data and a more complete characterization of the protein mixtures under study.

Differentiation of polymer branching and composition using the Mark–Houwink plot Application Note (English)

Here, we will show how to separate the effects of a structural difference induced by a compositional change to a polymer (e.g. substitution) and the structural change induced by polymer chain branching, using OMNISEC.

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