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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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Viscotek range The leading multi-detector GPC/SEC systems and detectors. Image
Measurement
Molecular structure, Molecular weight, Molecular size, Protein aggregation, Rheology and viscosity
Accuracy
Technology
Dilute Solution Viscometry, Size Exclusion Chromatography, Gel Permeation Chromatography, Static Light Scattering
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Powerful protein SEC made simple! Webinar - Live (English)

This webinar will discuss how Malvern’s protein SEC measurement capabilities within the Viscotek range have developed and improved in the last year. We will also introduce the new features that are included in the latest release of OmniSEC, i...

Product:
Viscotek range,Viscotek RImax,Viscotek DSV,Viscotek 270max,Viscotek TDAmax,Viscotek SEC-MALS
Date:
September 30 2014
Language:
English

Keywords: English Viscotek range Molecular structure Molecular size Molecular weight Gel Permeation Chromatography Static Light Scattering Size Exclusion Chromatography Webinar - Live Eastern Time Protein aggregation Proteins Biopharmaceutical development Viscotek 270max Viscotek DSV Viscotek RImax Viscotek TDAmax Viscotek SEC-MALS 

Using Multi-Detection GPC/SEC to Determine Impact of Sterilization on Medical-Grade Polymers Article (English)

This article gives an introduction to multi-detection GPC/SEC and presents data that shows how the technique is being used to determine the impact of sterilization on medical grade poly(L-lactide).


Keywords: Polymer solutions English Article Molecular structure Molecular weight Gel Permeation Chromatography Size Exclusion Chromatography Specialty and novel polymers Injectables Viscotek TDAmax 

Characterization of Single Wall Carbon Nanotubes (SWNTs) by combining Dynamic Light Scattering and Raman Spectroscopy Whitepaper (English)

The combination of DLS and Raman spectroscopy offers the ability to measure the length, diameter, and chirality of carbon nanotubes in a single experiment. These parameters can be used with existing empirical knowledge of nanotubes to pre...


Keywords: English Whitepaper Molecular structure Particle size Dynamic Light Scattering Raman spectroscopy Electronic displays Batteries Fuel cells Solar cells Carbon nanotubes Zetasizer Helix 

Polymer solution characterization part 3: Branching out! Intrinsically useful views on polymer structure Webinar - Recorded (English)

Most scientists can easily understand polymer molecular weight differences but often intrinsic viscosity, a harder concept to grasp, is a more useful measure of a polymer in solution. This webinar describes in simple terms what intrinsic ...

Product:
Viscotek TDAmax,Viscotek 270max,Viscotek RImax,Viscotek TDA 305,Viscotek SEC-MALS,Viscotek RImax
Date recorded:
June 24 2014
Language:
English

Keywords: Polymer solutions English Molecular structure Molecular size Molecular weight Gel Permeation Chromatography Static Light Scattering Size Exclusion Chromatography Food additives Bulk (commodity) polymers Rubbers and elastomers Polymers from renewable sources Polysaccharides Webinar - Recorded Eastern Time Proteins Viscotek 270max Viscotek RImax Viscotek TDAmax Viscotek SEC-MALS Viscotek TDA 305 

Overcoming the negative effect of protein structure on molecular weight measurement by Size Exclusion Chromatography – Two protein case studies with Anthrolysin and Bcl-2 Application Note (English)

A description of how advanced GPC/SEC detection can overcome inaccuracy in the measurement of molecular weight caused by deviation in the structure of the sample protein from that of the protein standards or interaction with the chromatography column...


Keywords: English Application Note Viscotek range Molecular structure Molecular weight Gel Permeation Chromatography Static Light Scattering Size Exclusion Chromatography Viruses and vaccines Protein aggregation Proteins 
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