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Mechanical, processing and resistance characteristics of polymers

Different tests are used to determine whether a material is rigid, tough, hard, soft, stretchable, brittle and resistant to certain media.
Different stresses (high or low temperature and exposure to certain chemical agents) can affect the mechanical properties of polymeric materials.

Some tests can be performed on the granulate or finished product, while for others the standards require the production or injection moulding of standard test pieces.

You can choose from a wide range of test methods:

Mechanical characteristics:

impact characteristics – Charpy, Izod, Dynstat;
tensile strength;
flexural strength;
Rockwell hardness;
Shore hardness.

Identification of polymers:

DSC – Determination of melting point Tm;
DSC – glass transition Tg;
IR analysis – material identification;
TGA – thermogravimetry #;
filler/inorganic residue content.

Processing characteristics:

density;
melt mass and volume flow rate (MVR, MFR);
viscosity;
shrinkage.

Resilience and durability:

Vicat softening temperature;
ball drop test;
moisture absorption;
resistance to mechanical stress;
abrasion resistance;
scratch resistance.

Media exposure:

resistance to cleaning and abrasive agents, petroleum derivatives, organic solvents, inorganic acids and bases, cosmetic preparations, oily components, various liquids.

Climate tests:

exposure to temperature;
exposure to relative humidity;
combined (cyclic and constant) exposures.

Technical cleanliness:

impurity mass, determination of the largest particles, classification into size classes.

Flammability:

plastic flammability;
burning rate;
glow wire test.

Artificial ageing:

resistance to UV ageing #.

Dimension measurements:

before and after temperature exposure;
microscopic measurements;
roughness measurements.

Electrical characteristics:

surface resistance;
volume resistance;
CTI index.

Emissions:

Odour analysis (Odour test);
fogging #;
VOC number #;
FOG number #.

_{#Some methods are implemented in collaboration with external contractors. In this case, the information will be shown on the offer.}


	List of flexible scope of accredited methods LP-004

New approved methods according to VW standards on polymer components and composites

Test	Standard
Burning behavior	TL 1010
Flammability of non-metallic materials	TL 1011
Plastic and elastic deformability	PV 3307
Permanent deformation under compression	PV 3330
Change in colour of the material at the point of impact with the dropping ball	PV 3966
Ball drop test (low temperature)	PV 3989
Resistance of seals to constituents of blowby gases	PV 3936
Abrasion behavior	PV 3906
Effect of hydrolysis on vehicle decorative material	PV 3959
Resistance in a damp heat environment	PV 3986
Peel test via floating rollers	PV 2034
Resistance to environmental cycling conditions (80 °C/-40 °C)	PV 1200


	Volkswagen Approval Certificate No 0130


	Volkswagen Approval Certificate No 0131

Test examples:

Impact toughness testing (Charpy)

Chemical agent exposures

Testing on a tearing machine

Sample preparation for FT-IR spectrophotometric analysis

We are available for additional questions and information:
Marjetka Lotrič, Head of sales – testing department
E: marjetka.lotric@lotric.si
M: +386 (0)31 640 252

Case study: change of properties of ABS materials under the influence of artificial ageing


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