Basic vs. Complex Test

Choosing and testing a plastic when only a few existed that could be used for specific products would prove relatively simple if the selection were limited, but the variety 

For the product designer, however, a simple basic test, such as a tensile test, will help determine which plastic is best to meet the performance requirements of a product. At times, a complex test may be required. The test or tests to be used will depend on the product s performance requirements. 

To ensure quality control material suppliers and developers routinely measure such complex properties as molecular weight and its distribution, crystallinity and crystalline lattice geometry, and detailed fracture characteristics (Chapter 6). They use complex, specialized tests such as gel permeation chromatography (2, 3), wide- and narrow-angle X-ray diffraction, scanning electron microscopy, and high-temperature pressurized solvent reaction tests to develop new polymers and plastics applications. 

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