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The Viscotek HT-GPC is a complete GPC system designed specifically for the molecular weight and structure characterization of polyolefins, with no bulk filtration of sample, and with the ability to handle other polymers, such as polythiophene, PEEK and PVF that require temperatures from approximately 100°C up to 160°C to stay in solution.
The HT-GPC system includes a high temperature RI, for use as a concentration detector, a light scattering detector for absolute molecular weight determination and a viscometer for intrinsic viscosity determination and branching. All of these detectors are optionally so the system can be customized to conventional and universal calibration systems. It also features a temperature controlled column chamber and automated filtering of the sample at high temperature, to ensure safe handling.
The HT-GPC pump passes mobile phase through the GPC/SEC chromatography columns, following by the injector. After injection, the sample is filtered through a self-cleaning filter before flowing to the columns. The columns are maintained at the same temperature as the injector and detectors. After eluting from the column, the dissolved polymer molecules, now separated by size, enter the light scattering and RI detectors. Light scattering detection is used to determine the absolute molecular weight of the sample, and refractive index detection is used to measure its concentration.
Finally, the sample passes through the viscometer for intrinsic viscosity determination and branching and then on to waste.
When you purchase a Malvern product we understand that this is just the first stage of a working relationship that will last for the lifetime of the instrument. Some customers just need to ask an occasional question or to download a software upgrade, whilst others require a comprehensive support contract with priority call out and fixed cost of ownership. Whatever your situation Malvern will provide the right support for you.
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In this paper we will review and present some of the old and new issues and practical solutions to implementing reliable, robust absolute molecular weight and structural determinations in HT-GPC of polyethylene.
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User manual for the Viscotek SEC-MALS 20 instrument
User manual for the Viscotek Y501D instrument used with Dilute Solution Viscometry (DSV) systems
(Webinar - Recorded)
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