Polyarylethers blends

Polymer Compatibilization Blends of Polyarylethers with Styrenic Interpolymers... 

More or less similar behavior has been observed (8) in the blends of the copolymer or the terpolymer with the following bis-A polycarbonate, polyvinyl chloride, poly (ethyl methacrylate), and a terpolymer made from methyl methacrylate, N,N -dimethyl acrylamide, and N-phenyl-maleimide. Because of this unique miscibility characteristic of the a-methyl styrene interpolymers, an attempt was made at compati-bilizing polyarylethers with the interpolymers by attaching pendant chemical groups known to exist in systems with which the interpolymers are miscible. 

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... 

During the last 40 years, ABS blends with most polymers have been patented. For example, wdth PVC in 1951, PC (introduced in 1958) in 1960, polyamide (PA-6) a year later [Grabowski, 1961a], polysulfone (PSF) in 1964, CPE in 1965, PET in 1968, polyarylether sulfone (PAES) and styrene-maleic anhydride (SMA) in 1969 (the blend is one of two resins called high heat ABS — the other being ABS in which at least a part of styrene was replaced with p-methylstyrene), polyethersulfone (PES) in 1970, polyarylates (PAr) in 1971, polyurethane in 1976, polyarylether (PPE or PAE) in 1982, with polyphenylene sulfide (PPS) in 1991, etc. 

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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