Polymer property characterization

PRT GmbH offers a variety of polymer analysis. Please contact us for your specific needs. The flexibillity and experience within PRT GmbH will assist you in obtaining your desired results. Our integrated aproach comprises all the essential elements of catalytic and free-radical polymerization technologies.

Particle size distribution
Particle size distribution can be analysed by laser diffraction
Alternatively, sieve analysis can be done

Melt Flow Index

For industrial standardization the melt flow index (MFI), melt flow rate (MFR), melt volume rate (MVR), and melt density/viscosity can be analysed with the Davenport Melt Flow Indexer MFI-10.


The method complies with BS 2782 Part 7: Method 720A, ISO 1133 and ASTM 1238 Methods A and B


Temperature range:  40 – 400 °C

Molecular weight

The molecular weight can be analysed using Lauda Intrinsic viscosity analysis.


The molecular weight can be determined using the Mark-Houwink relationship. With inhouse developed techniques, the intrinsic viscosity (Staudinger Index) can be evaluated up to viiscosity average molecular weights of 7×106 g/mol in case of UHMWP

PRT can convert intrinsic viscosity data to moleczlar weight for PE and PP especially


We can do pore size analysis of particles using a Micromeretics Autopore III 9410 mercury porosimeter.


Pore Size range:  0.006~360 µm
Pressure Range: 0 – 4081 Bar 
Intrusion Resolution: < 0.1 µl/g

Differential Scanning Calorimetry (DSC)

Crystallinity and melting point of polymers can be analyzed

Strain-Stress Analysis

Prepared specimen can be analzed; alternatively:PRT can prepare specimen from powders by sinter-pressing

Gas & Liquid feed

Mass flow controlled feed

  • Mass flow controlled gas feed
  • Mass flow controlled liquid feed


Controlled evaporator mixer feed for liquid co-monomer feed


liquid feeds
HPLC controlled high pressure feed


Standard gas feeds and utilities

  • vacuum systems
  • Nitrogen for flushing
  • Pressure controll systems


Multi purpose batch reactors
PRT GmbH provides stainless steel jacketed multipurpose batch reactors for olefin polymerization. Our reactor systems are mounted in mobile stainless steel frames. The combination of the reactor, feed supply, injection and temperature control makes such a system a mobile plug-and-play tool.

Volume range 0.5 – 20 L
Pressure range UHV -250 bara
Temperature range 10-220 ?C

The reactor itself can be optionally equiped with:

  • Bottem valve for sampling
    (when internal heater is not present)
  • Interchangable stirrers
  • Elevator system for easy handling
  • Stirrer speed control
  • Multistage safety system

Feed purification

Gas/Liquid Purification
PRT builds gas and liquid purification systems for labscale reactor systems and pilot plants. The purification on the bases of copper catalysts and molecular sieves gives selective high purity gas quality results.

Components: hydrogen, nitrogen, ethylene, propylene and/or solvent (Hexane, etc)


outlet pressure:  60 bar
Throughput: 3-30 kg/day
Quality: polymerization grade
Outlet pressure range up to 100 bara


The purification unit can be optionally equiped with a feed control system.

Click here for some examples of a single component purification systems

Data acquisition and control

Data acquisition
PC, Webbased

PC, Webbased, pneumatic valves, 19″ rack

Image. Screenshot

Temperature control

Water system

  • Normal water system
  • Pressurized water system
  • Isoperibolic heating system where the jacket temperature is kept constant
  • Isothermal heating system where the reactor temperature is controlled

Thermal fluid systems
oil heating systems


Internal heating system
Isothermal calorimetric heating system, where the temperature is controlled and the heat production is measured.


Electrical heating system
for regeneration of purification

Online analysis

IR analysis

Online Infra-red gas analysis for main reactor components and composition control
Micro GC analysis
oil heating systems


Internal heating system
semi-online analysis. Connected to DAQ system for composition control

Catalyst preparation



Compleet systems

All systems described in this section can be combined to a complete labscale reactor system or pilot plant.