Polyarylethers mechanical properties

Table II contains the mechanical properties and the glass-transition temperatures of the styrenic interpolymers, the various polyarylethers, and their 50/50 blends.

The composition dependence of the flexural strength of the aMS/AN-copolymer blend with polyarylether K appears in Figure 13. As the composition of the copolymer increases, the strength first increases, reaches a maximum, and then decreases. It actually exhibits a minimum at about 80% < MS/AN. This behavior can only substantiate earlier suggestions regarding the possible immiscibility of these systems. All of the other mechanical properties indicate that mixtures with polyarylether K may not be miscible but are mechanically compatible. Finally, it is interesting to note that at least one of the pendant chemical groups present on K exists on either of the a-methyl styrene interpolymers. It... 

Detailed properties of the commercial polyarylethers introduced by Union Carbide are beyond the scope of this paper but can be found in the accompanying paper by M. E. Sauers, L. A. McKenna, and C. N. Merriam. Provided here is a basic mechanical property profile of the three polyethers commercially manufactured by Union Carbide. 

Polysulfone PSU is a typical amorphous polyarylether and it shows high heat resistance, nice dimensional stability, and good mechanical properties. However, it has low stress crack resistance and high melt viscosity, which could be overcome by blending with Polyamine PA, a partially crystalline polymer [83]. 

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