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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.

Related products

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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Exploring the role of SEC-MALS in protein and polymer characterization Webinar - Recorded (English)

Size exclusion chromatography (SEC) is a chromatographic technique for the characterization of proteins and biopharmaceuticals, as well as natural and synthetic polymers. Traditional systems comprised a single concentration detector (Conventional Cal...

Product:
Viscotek SEC-MALS,Viscotek 270max,Viscotek TDAmax,Viscotek RImax
Date recorded:
October 17 2014
Language:
English

Keywords: Polymer solutions English Molecular structure Molecular size Molecular weight Gel Permeation Chromatography Static Light Scattering Size Exclusion Chromatography Food additives Rubbers and elastomers Specialty and novel polymers Membrane proteins Polysaccharides Webinar - Recorded GMT Time Protein aggregation Proteins Bioformulation development Antibodies and derivatives Viscotek 270max Viscotek RImax Viscotek TDAmax Viscotek SEC-MALS 

Powerful protein SEC made simple! Webinar - Recorded (English)

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

Product:
Viscotek range,Viscotek RImax,Viscotek DSV,Viscotek 270max,Viscotek TDAmax,Viscotek SEC-MALS
Date recorded:
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 - Recorded Eastern Time Protein aggregation Proteins Biopharmaceutical development Viscotek 270max Viscotek DSV Viscotek RImax Viscotek TDAmax Viscotek SEC-MALS 

Interfacing Viscotek detectors with Waters SEC systems and Waters Empower® software Technical Note (English)

This technical note describes how to connect Viscotek detectors to Waters systems, in particular the Waters Alliance® system, and how to use OmniSEC in combination with Empower® to run trouble-free separation sequences.


Keywords: English Technical Note Molecular structure Molecular size Molecular weight Gel Permeation Chromatography Static Light Scattering Size Exclusion Chromatography Membrane proteins Protein aggregation Proteins Biopharmaceutical development Antibodies and derivatives Viscotek 270max Viscotek HT-GPC Viscotek RImax Viscotek TDAmax Viscotek detectors 

Measuring protein molecular weight using the Viscotek SEC-MALS 20 connected to a Waters Empower® SEC system Application Note (English)

In this application note, we show that Malvern’s OmniSEC software can now communicate with Waters Empower® for the seamless exchange of sample sequences. A selection of proteins was used to demonstrate the measurement of protein molecular weight, oli...


Keywords: English Application Note Molecular structure Molecular size Molecular weight Gel Permeation Chromatography Static Light Scattering Size Exclusion Chromatography Membrane proteins Protein aggregation Proteins Biopharmaceutical development Antibodies and derivatives Viscotek 270max Viscotek HT-GPC Viscotek RImax Viscotek TDAmax Viscotek detectors 

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 
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