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Material properties of plastics

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Testing of Material Properties of a Product

  • During the manufacture of a finished product or a semi-finished product, the processed polymer is subject to a variety of mechanical, thermal, and chemical loadings and normally forms orientations for the polymer chains and fillers. Therefore, the mechanical properties of a polymer differ at various points of the component.
  • To compare material properties of an end product produced by injection molding, extruding, or compression molding, a sampling plan for the specimen is defined. This sampling plan is based on the forming process of the end product and defines the number, form, size, and direction of sampling of the specimen.
  • After appropriate conditioning, the specimens taken are tested to the test standards also used in molding materials or to specific information found in the product specification.
  • Regular specimen sampling from ongoing production ensures that specific material properties remain constant in one product within predefined tolerances and over longer production periods.
  • ZwickRoell supplies reliable universal testing machines and extensometers for tensile, flexure and compression tests, together with pendulum impact testers, hardness testing machinesextrusion plastometers and HDT/Vicat testers in manual and fully automated versions. Thus, the statistical scatter of your results is significantly reduced.

Quasi-static tests

Tensile Tests on Plastics
ISO 527-1, ISO 527-2
to Tensile Tests on Plastics
Tensile Tests on Plastics
ASTM D638
to Tensile Tests on Plastics
3-point flexure test plastics
ISO 178
to 3-point flexure test plastics
3-point flexure test plastics
ASTM D790
to 3-point flexure test plastics

Tests at increased and high strain rates

Notched Charpy impact test on plastics
ISO 179-1, ISO 179-2
to Notched Charpy impact test on plastics
Izod impact test plastics
ASTM D256
to Izod impact test plastics
Notched Izod impact strength plastics
ISO 180
to Notched Izod impact strength plastics
Tensile impact test plastics
ISO 8256, ASTM D1822
to Tensile impact test plastics
Tensile tests at high strain rates
ISO/CD 22183, ISO 18872, SAE J 2749
Crash simulation
to Tensile tests at high strain rates
Plastics puncture test
ISO 6603-2, ISO 7765-2, ASTM D3763
to Plastics puncture test
Dynstat flexure and impact bending test
DIN 53435
The Dynstat flexure test, the Dynstat impact bending test, and the notched impact bending test to DIN 53435 are used in the characterization of material properties for components made of plastics.
to Dynstat flexure and impact bending test

Creep tests

Creep test plastics
ISO 899-1, ISO 899-2, ASTM D2990, ISO 16770
to Creep test plastics

Rheological and thermal properties, hardness

Melt flow index test plastics
ISO 1133-1, ISO 1133-2, ASTM D1238
Determination of Melt Mass Flow Rate (MFR) and Melt Volume Flow Rate (MVR)
to Melt flow index test plastics
Determination of HDT VST plastics
ISO 306, ASTM D1525, ISO 75, ASTM D648
Determination of heat deflection temperature (HDT) and Vicat softening temperature (VST)
to Determination of HDT VST plastics
Hardness tests plastics
ISO 7619-1, ISO 868, ASTM D2240, ISO 2039-1/-2, ASTM D785, ISO 19278
to Hardness tests plastics

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