PSL-Rheotek RPV-1 systems

Polymer, Pulp and Ink viscometers

Determination of Dilute Solution Viscosity using glass capillary viscometers.

The PSL Rheotek range of manual and automated polymer viscometers are suitable for determining the solution viscosity of a wide range of polymers. Solution viscosity can be described as the increase in viscosity of a solvent when a polymer is dissolved in that solvent.
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Determination of Dilute Solution Viscosity using glass capillary viscometers.

The PSL Rheotek range of manual and automated polymer viscometers are suitable for determining the solution viscosity of a wide range of polymers. Solution viscosity can be described as the increase in viscosity of a solvent when a polymer is dissolved in that solvent. There are several ways to represent this, including:
 
  • Relative Viscosity
  • Specific Viscosity
  • Reduced Viscosity (viscosity number)
  • Inherent Viscosity (logarithmic viscosity number)
  • Intrinsic Viscosity (limiting viscosity number)
  • K­Value
  • Average degree of polymerization


All of the above properties are determined by measuring the viscosity of a known concentration of polymer dissolved in a solvent. The solution viscosity of a polymer changes with respect to molecular size and weight.

Precision
The precision of solution viscosity results will be dependent upon the variability of the actual polymer itself as well as the variability of the measurement process. Measurement variability can occur in a number of different areas, including preparation of the concentration, control of sample dissolution, temperature of measurement, flow time measurements and calculation of results. RPV­ viscometer systems are designed to minimize measurement variability from each step of the solution viscosity analysis. However, it should be noted that there will always be a degree of variability within the polymer itself.




 
PSL-Rheotek RPV-1 models
 
Model Standards Description Image
Polymer ASTM D789, ISO 307, ASTM D4603, ISO 1628­5, ASTM D1243, ISO 1628­2, ASTM D2857, ISO 1628­1 Standard Polymer Viscometer System

Automated polymer viscometer configured with one to four measuring positions. Each position has a unique RPV filling station for sample introduction, nlR meniscus detection for precise flow time measurements as well as an in­situ solvent cleaning & drying system. Suitable for most types of polymers dissolved in acids, organic solvents and water, including PET, PA, PVC, PVA, PC, cellulose acetate and bio­polymers. (For high temperature polymer application e.g. PP & PE see RPV­1 HT).
Pulp SCAN CM 15:99, ISO 5351 & ASTM D1795 Intrinsic Viscosity (Martin's formula) TAPPI T230 Viscosity of Pulp (Capillary viscometer method) IEC 60450, ASTM D4243 (Measurement of the Average Viscometric Degree of Polymerization of New & Aged Electrical Papers & Boards) Standard Pulp, Cellulose & MCC Viscometer System

Automated pulp viscometer configured with one to four measuring positions with built in nitrogen purge system. Each position has a unique RPV filling station for sample introduction, nlR meniscus detection for precise flow time measurements as well as an in­situ solvent cleaning & drying system. Suitable for Microcrystalline cellulose (MCC), pulp, cellulose and electrical papers dissolved in CED.
RSS ISO 307, ASTM D4603, ISO 1628­5, ASTM D1243, ISO 1628­2, ASTM D2857, ISO 1628­1 Polymer Viscometer with Smart Sampler

Automated polymer viscometer configured with a XYZ auto sampler with one or two measuring positions. Samples are automatically loaded, reducing operator exposure to solvents as well as allowing for greater efficiency.
Auto - PET,PA,PVC ASTM D4603, ISO 1628­5, ISO 307, ASTM D1243, ISO 1628­2, ASTM D2857, ISO 1628­1 Fully automated polymer viscometer with integrated sample preparation, sample dissolution blocks and solution viscosity measurement.
AutoPulpIVA ASTM D1795, ISO 5351, SCAN 15:99 Automated pulp and cellulose viscometer suitable for determining the intrinsic viscosity of samples dissolved in cupriethylenediamine (CED solution). AutoPulpIVA systems are configured with two measuring positions with integrated sample preparation, CED delivery, sample stirring, flow time measurement, in­situ cleaning and reporting of results. The advantages of full automation is that CED is delivered directly to the sample vial, under a blanket of nitrogen, as well as ensuring that all samples are treated in exactly the same way, minimizing the variability of results.
HT PPPE ISO 1628 Part 3, ASTM D1601, ASTM D4020 Polymer Viscometer for high temperature

Automated high temperature polymer viscometer specially adapted for measuring polythylenes (PE) and polypropylenes (PP) at 135ºC dissolved in decahydronapthalene (Decalin). Suitable for measuring low, medium and high density samples.
Ink Ink Automated polymer viscometer suitable for measuring inks and pigments configured with up to four measuring positions. Each position has an injection port for sample introduction, nlR meniscus detection for precise flow time measurements and a solvent & drying cleaning system.





Specific details
 
Model Positions AS ISP CED SB RS Sol
Polymer 1,2,4           2,3
Pulp 1,2,4            
RSS 1,2 yes         2,3
Auto - PET,PA,PVC 2 yes yes        
AutoPulpIVA 2 yes yes yes yes   2
HT PPPE 1,2 yes yes     yes 2
Ink 4           3

AS - Auto sampler
ISP - Integrated sample preparation
CED - Auto delivery of Cupriethylenediamine solution
SB - Stirring block
RS - Reaction station
Sol - Solvent
PPPE - Polypropylene / Polyethylene in Decalin
  • Dilute Solution Viscosity
  • Cellulose, CED Pulp
  • PET, PA, PVC
  • HDPE, PP in Decalin
  • Ink viscosity
  • Auto sampler

This product is compliant with the following test methods:

  • ASTM D445
  • ASTM D446
  • IP71
  • ISO 3104
  • ISO 3105
  • ASTM D2857
  • ASTM D4243
  • ASTM D4603
  • ASTM D789
  • IEC 60450
  • ISO 1628­1
  • ISO 1628­2
  • ISO 1628­5
  • ISO 307
  • ISO 5351
  • SCAN 15:99