Molecule weight distribution

Purpose

RISE can analyze the molecular weight distribution in cellulose samples of the type bleached pulps, viscose solution and viscose threads. The instrument used is an integrated high temperature system for GPC analysis and is equipped with a RI detector.

It is possible to analyze the molecular weight distribution of cellulose in bleached pulp samples, viscose solutions and in viscose threads. The sample is dissolved and analyzed at a temperature of 70 oC. The method provides safe and reproducible values.

Method

The method is well suited for changes in driving style or equipment of one or more process steps. One gives a measure of how the pulp quality was obtained in a process change. A reference before the process change is recommended to see the difference over the molecular weight distribution before and after.

For example, a shift toward a lower average of the molecular length indicates that the strength properties have deteriorated. By dissolving viscose threads before analysis, we can similarly see if the strength of the thread has been affected as a result of the molecular weight distribution changing. If necessary, it can also be supplemented with a viscosity detector and a light scattering detector.

We can also help you to characterise lignin, lignosulfonate, biocides and black liquor.

Advantageously, multiple samples are sent due to time-consuming startup.

Deliveries

Analysis results are delivered by short report.