Designed specifically and exclusively for the characterization of polyolefins, the Viscotek High Temperature GPC (HT-GPC) system brings advanced triple detector technology to this demanding application. The HT-GPC operates up to 160°C to handle even the toughest polypropylene samples and is engineered in a modular format for flexibility, reliability and easy maintenance.
The system is available in four detector configurations:
- Conventional Calibration – using RI (refractive index) detection with column calibration
- Light Scattering – using RI + light scattering (LALS) detection for direct molecular weight measurement without column calibration.
- Universal Calibration – using RI + Viscometer detection to give true molecular weights plus branching data.
- Triple Detection – using RI + Viscometer + light scattering (LALS) for direct molecular weight measurement and branching data.
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In the full triple detector configuration the Viscotek HT-GPC system will provide absolute molecular weight without extrapolation or correction, molecular size (Rg and Rh), intrinsic viscosity and branching in a single GPC/SEC experiment.
All detectors reside within a temperature-controlled oven compartment which has space for four analytical GPC columns. The HT-GPC also features an in-line, self-cleaning filter system.
In all the configurations, the Vortex autoprep/autosampler is a significant new development in sample preparation and delivery for high temperature GPC. It consists of an integrated autosampling device and heated multivial stirrer so the sample is dissolved and automatically injected with temperature control to 160°C. This increases efficiency, enhances precision and promotes safety by removing the operator from the sample preparation process. The Vortex eliminates the need to transfer hot sample from a preparation vial to an autosampler vial and the HT-GPC filters the sample automatically on injection.
The whole process of sample preparation, sample injection, data acquisition and data calculation is handled by the advanced OmniSEC software. OmniSEC has full polymer branching calculations capability. Analysts can study the polyolefin long chain branching by using the intuitive and powerful Branching View function. This provides a fully interactive graphical user interface to the Zimm-Stockmayer branching calculations.
What makes the Viscotek HT-GPC unique?
- Automation
- Intuitive and powerful software
- Detection
- Modular construction
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Separation theory:
Separation theory
How are the macromolecules separated?
Calculation types:
Conventional Calibration
For relative molecular weight measurements using a single RI or UV detector.
Universal calibration
For accurate molecular weight of polymers, branched polymers and copolymers
Triple Detection (Absolute Molecular Weight)
Direct measurement of molecular weight, molecular size and structure for all proteins and polymers.
Detector theory:
RI detector theory
The standard concentration detector for GPC/SEC
Light Scattering Detector theory
For absolute molecular weight measurements and triple detection of macromolecules
Viscometer Detector theory
Needed for universal calibration and triple detection.
Product details: Product details:
Columns
Malvern offers a comprehensive range of GPC/SEC columns as part of the Viscotek product portfolio.
Standards
Polymer standards for multi-detector and column calibration
For flere detaljer og pris, kontakt venligst MD Scientific via e-mail: info@md-scientific.dk eller telefon: 7027 8565.
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