Numerous factors affect various mechanical effects of polymers, in- clouding molecular weight, processing, extent and allocation of crystallinity, the composition of polymer, and use temperature.
In general, the mechanical properties of polymers can be described in very much the same way as in the case of metals or other standard crystalline materials, in particular via the moduli of elasticity and different other classes of strength measures, such as the yield and tensile strengths.
Obtaining the classification of a semi-crystalline polymer means that the material exhibits arranged and tightly packed molecular chains. The regions of crystallinity are called spherulites and can vary in shape and size with undeveloped areas living between the crystalline areas.
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