Ultra-high modulus polyolefins

Abstract
The factors that determine the production of ultra-high modulus linear polyethylene by tensile drawing and hydrostatic extrusion are discussed. In both cases the molecular mass and molecular mass distribution are important, and for low molecular mass polymers the initial crystallization can also play a critical role. The similarities and the differences between the two types of process are indicated. Following a brief discussion of the structure of these unusual materials, the dynamic mechanical behaviour and other physical properties are considered. It is of especial interest that there is a link between the creep and recovery behaviour and the drawing process.

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