ISO 1628 Part 2 PVC testing

Determination of the solution viscosity of PVC – K-value

The PSL Rheotek Polymer Testing Laboratory (based in the United Kingdom) is equipped with RPV-1 and RPV-2 viscometers for testing the solution viscosity of a wide range of polymers.

For PVC testing, the laboratory can provide a quick turnaround of sample testing using the RPV-2 AutoPVC configuration.

Samples tested will typically be PVC resins in powder form.

Testing of PVC samples dissolvable in Cyclohexanone will be carried out in full compliance with ISO1628 Part 2 and reduced viscosity and K-value will be reported. Alternatively, samples can be tested to ASTM D1243 and Inherent Viscosity will be reported. In particular, samples will be prepared on a weight to weight basis using the integrated sample preparation system.

An optional PVC control standard can be run for each viscometer measuring position for each batch of samples measured. These can also be supplied for internal customer quality control purposes.

Test Report

For each sample preparation, the test report will include the following information:

  • Sample ID and description
  • Details of the viscometer configuration used for testing
  • Concentration (including exact sample and solvent weight)
  • Dissolution conditions (temperature and time)
  • Average solvent flow time and interim flow times with precision obtained
  • Average solution flow time and interim flow times with precision obtained
  • Glass capillary viscometer* (type, size, serial number & constant)
  • Testing temperature (including verification of temperature by certified reference thermometer*)

All calculated results, including:

  • Relative viscosity, Reduced viscosity, K-value
  • Inherent viscosity (Logarithmic Viscosity Number) to 3 significant places

 * calibrated in accordance with ISO 17025

Technical consultation

For each set of results submitted, PSL Rheotek will provide one-hour email or telecom technical support to discuss methodology and/or results reported.

 

How to submit your samples:

Please send your samples to:

PSL Rheotek USA – 12692 Sandy Drive, Suite 115, Granger, IN 46530, USA

PSL Polymer Testing Laboratory – Russell House, Burnham Business Park, Burnham-on-Crouch, Essex. CM0 8TE. UK

Approximately 5g of sample (or larger amount as it will be more representative of the variability of should be sent together with the following information:

Sample ID, % of inert insoluble material if greater than 0.5%, approximate dissolution temperature and time as well as any custom 

PVC solution Viscosity Test Fee code:

T-DSV-PVC-1 testing of samples in accordance with ISO 1628 Part 2

T-DSV-PVC-2 testing of samples in accordance with ASTM D1243

PVC Standards:

20507/3 ISO 1628-2 and DIN 53726 PVC K-value solution viscosity polymer reference sample – produced by the PSL Rheotek polymer testing laboratory (pack of 3)

20507/10 ISO 1628-2 and DIN 53726 PVC K-value solution viscosity polymer reference sample – produced by the PSL Rheotek polymer testing laboratory (pack of 10)

20511/3 ASTM D1243 PVC solution viscosity polymer reference sample - produced by the PSL Rheotek polymer testing laboratory (pack of  3)

20511/10 ASTM D1243 PVC solution viscosity polymer reference sample - produced by the PSL Rheotek polymer testing laboratory (pack of 10)

 

The PSL Polymer Testing Laboratory can provide analysis of the following types of polymers:

PET – ASTM D4603 – ISO 1628 – ASTM D2857

PA – ASTM D789 – ISO 307

PVC – ASTM D1243 – ISO 1628

PP/PE (including UHMW) – ASTM D4020 - ASTM D1601 – ISO 1628

Pulp, cellulose – ASTM D1795 – Tappi T230 – ISO 5351

Any other type of polymer that can be dissolved in organic or inorganic liquids

 

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