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 OMNISEC, 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.

OMNISEC

OMNISEC

The world’s most advanced multi-detector GPC/SEC system

More details
Measurement Molecular structure, Molecular size, Molecular weight
Molecular weight range 200Da - 10MDa
Minimum sample mass (polystyrene) 100ng
Minimum sample mass (BSA) 100ng
Technology Gel Permeation Chromatography, Size Exclusion Chromatography (SEC), Light Scattering, Static Light Scattering

Empyrean Nano Edition

Empyrean Nano Edition

Versatile X-ray scattering platform

More details
Measurement Molecular weight, Particle shape, Particle size, Surface area, Protein aggregation, Protein stability, Phase identification, Phase quantification, Pore size distribution
Goniometer configuration Vertical goniometer, Θ-Θ
Particle size range 1 - 100 nm
Technology X-ray Diffraction (XRD), X-ray Scattering

Zetasizer range

Zetasizer range

The world’s most widely-used systems for nanoparticle, colloid and biomolecular particle sizing and particle charge measurements

More details
Measurement Molecular size, Molecular weight, Particle size, Zeta potential
Temperature range 0°C - 120°C
Particle size range 0.3nm - 10µm
Technology Light Scattering, Dynamic Light Scattering, Electrophoretic Light Scattering, Static Light Scattering
Dispersion type Wet
Sample cell type Cuvette
Molecular measurement type Chromotography, Batch measurement

OMNISEC

OMNISEC

The world’s most advanced multi-detector GPC/SEC system

Empyrean Nano Edition

Empyrean Nano Edition

Versatile X-ray scattering platform

Zetasizer range

Zetasizer range

The world’s most widely-used systems for nanoparticle, colloid and biomolecular particle sizing and particle charge measurements

More details More details More details
Measurement Molecular structure, Molecular size, Molecular weight Molecular weight, Particle shape, Particle size, Surface area, Protein aggregation, Protein stability, Phase identification, Phase quantification, Pore size distribution Molecular size, Molecular weight, Particle size, Zeta potential
Molecular weight range 200Da - 10MDa    
Minimum sample mass (polystyrene) 100ng    
Minimum sample mass (BSA) 100ng    
Goniometer configuration   Vertical goniometer, Θ-Θ  
Particle size range   1 - 100 nm 0.3nm - 10µm
Temperature range     0°C - 120°C
Technology Gel Permeation Chromatography, Size Exclusion Chromatography (SEC), Light Scattering, Static Light Scattering X-ray Diffraction (XRD), X-ray Scattering Light Scattering, Dynamic Light Scattering, Electrophoretic Light Scattering, Static Light Scattering
Dispersion type     Wet
Sample cell type     Cuvette
Molecular measurement type     Chromotography, Batch measurement

OMNISEC

Zetasizer Advance Range

Empyrean Nano Edition

OMNISEC Zetasizer Advance Range Empyrean Nano Edition

The world’s most advanced multi-detector GPC/SEC system

Light Scattering for every application

Versatile X-ray scattering platform

More details More details More details
Measurement type
Molecular structure
Molecular size
Molecular weight
Technology
Gel Permeation Chromatography
Size Exclusion Chromatography (SEC)
Dynamic Light Scattering
X-ray Diffraction (XRD)