PMSE 323 |
| Multi detector (or triple detection) gel permeation chromatography with concentration, viscometry and light scattering detection is an excellent technique for polymer analysis. Accurate molecular weights are determined independent of column calibration. In addition, it can provide not only significantly improved molecular weight information compared to conventional GPC, but also molecular sizes can be measured to yield complex structural details, such as the size of polymer chains in solution and the presence of branching on the backbone. However, multi detector GPC systems involve a significant increase in the complexity of the GPC experiment in terms of both data handling and equipment and as a result, triple detection systems have traditionally been complex, unreliable and expensive, leading to restricted use. This paper describes the PL-GPC 50 integrated GPC instrument, which is optimally configured for triple detection. The dual angle (45° and 90°) light scattering detector, four-capillary bridge viscometer, refractive index detector, pump and injection valve are all housed within a single unit. Use of the viscometer in conjunction with the refractive index detector allows the PL-GPC 50 to be used for GPC-viscometry applications employing the universal calibration approach. The instrument is also fitted with a PL-LS 45°/90° dual angle light scattering detector, which can be used with the refractive index detector for GPC light scattering or combined with the refractive index detector and viscometer for triple detection type analysis. This makes the PL-GPC 50 a cost-effective, fully-featured and software-controlled system for polymer analysis. In addition, the Cirrus GPC software suite, which is included, complements the PL-GPC 50 to provide a wealth of calculation options. |
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Joint PMSE/POLY Poster Session
6:00 PM-8:00 PM, Tuesday, 12 September 2006 Moscone Center -- Hall D, Poster
Division of Polymeric Materials: Science & Engineering |