Compositional Window of Miscibility Terpolymer System with Common Monomers

The methylmethacrylate-alphamethylstyrene-acrylonitrile terpolymer system is an attractive component in compatible blends with acrylonitrile butadiene styrene (ABS). The compositional window of terpolymer and terpolymer miscibility is of interest during manufacture and during blending. The common monomers in the terpolymer A, terpolymer B are a-methylstyrene, acrylonitrile, and methyl methacrylate. The B 

and Z are the compositional mismatch [12,13] between a components in polymer A versus the same component in polymer B. 

In a Quattro Pro spreadsheet values for X were generated using random number generator between (-1,+1). The RAND key is used and the range is confined to (-1,1) with the values generated being fractional numbers. The same for Y and Z, making sure that 

In a similar manner, the blend of terpolymer A, styrene-methyl methacrylate-acrylonitrile, and polymer B, a different terpolymer with monomers styrene, methyl methacrylate, and acrylonitrile, can be studied using the binary interaction model and miscibility window obtained  

FIGURE 3.2 Miscibility of terpolymer-terpolymer with common monomers predicted by binary interaction model. 

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