This application note describes the use of the Agilent 390-MDS multi-detector suite for GPC triple detection of polyvinyl butyral (PVB). PVB is an important material with a wide range of applications requiring strong binding, optical clarity, excellent surface adhesion, toughness and flexibility. The most well-known application of PVB is in laminated safety glass, for example, in the windscreens of vehicles. In such products, PVB is used as an interface layer between two sheets of toughened glass. The interface layer absorbs the energy of impacts, binding broken shards of glass together and distributing the force of the impact over a wide area. The use of laminated glass has greatly reduced injuries resulting from automobile accidents. As it is the viscoelastic properties of PVB that contribute to its performance in glass laminates, the molecular weight distribution of the material must be closely monitored to ensure optimum performance. Gel permeation chromatography (GPC) with triple detection, employing a light scattering detector and viscometer, may be used to determine accurate molecular weights for polymers such as PVB. Three PVB materials were analyzed using these techniques, one of which did not perform as expected in application testing.
This document details the analysis of Polyvinyl Butyral (PVB) using Gel Permeation Chromatography (GPC) with triple detection. The technique employs a light scattering detector and a viscometer to determine accurate molecular weights for polymers like PVB, which is critical for ensuring the performance of materials used in laminated safety glass.
| Columns | 2x Agilent PLgel 5 pm MIXED-C, 300 x 7.5 mm |
|---|---|
| Injection Volume | 100 pL |
| Eluent | THF (stabilized) |
| Flow Rate | 1.0 mL/min |
| Detector Temp | 40 °C |
The 390-MDS is designed for applications using organic solvents.
The 390-MDS can be linked with any liquid chromatography system.