Skip to main content
RISE logo

Molecule weight distribution

RISE can characterize pulp, carboxymethylcellulose, polyacrylate, starch, biocides, lignin, black liquor, hemicellulose.

Cause

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.

 

Ordering

Ordering is via contact person

Facts

Service

Molecule weight distribution in cellulose samples

Instrument

Weights

Metrology Area

Mass / Weight

Innovation area

Bioeconomy, Pulp and paper

Delivery level

Non-accredited

Price

Price on tender

Delivery time

Analysis results are delivered by e-mail, normally within 15 workdays from the arrival of the samples. Results from samples requiring special preparation, might take longer time.

Preparations

No preparation needed

Supports the UN sustainability goals

9. Industry, innovation and infrastructure

Contact person

Christina Wedin

Coordinator

Read more about Christina

Contact Christina
CAPTCHA This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

* Mandatory By submitting the form, RISE will process your personal data.

Related

Service

Viscose fiber characterization

Fiber characterization such as linear density, fiber strength or tenacity and elongation of staple fibers and filaments from viscose and particle size show the condition of the fiber.
Test & demo

Viscose plant - development of dissolving cellulose

To develop and optimize regenerated cellulose, RISE has two viscose pilots, one on a micro scale and one for larger volumes of viscose solution. The pilots consist of six parts which together correspond to an actual manufacturing …
Test & demo

Spinning pilot - manufacture thread on a lab scale

Increased population in the world results in increased consumption of textiles. This means that the textile raw material needs to be optimized and its process developed to make them more sustainable so that the consumption of the …
Service

Analyzes of pulp for dissolving

To see if a cellulose pulp is suitable for dissolving, it needs to be characterized and tested, which RISE can help you with.
Service

Light microscopy quickly shows small details

With light microscopy, you can quickly get an overview of the problem and all images are displayed in color. It is often used in connection with product development, problem solving and support to end customers. To gain an underst…
Service

Analyzes for raw material control

When you buy new chemicals, it can be good to know that the new one is as good as the old chemical. We can help you analyze a number of chemicals.
Service

Gas chromatography-mass spectrometry identifies many materials

Materials and processes need to identify their products. Using gas chromatography-mass spectrometry facilitates the work and it is often used in connection with problem solving and environmental issues. The instrument is very usef…
Service

Scanning electron microscopy sees surface structure and elements

Processes are often warm and humid that create good environments for bacteria, precipitates and other undesirable phenomena that contribute to disruption and degradation of end products. Scanning electron microscopy (SEM/XDS) has …