Miscibility compositional window in terpolymers with common monomers using @RAND in spreadsheet

The compositional window for which two terpolymers with common monomers are miscible can be calculated using a spreadsheet such as Quatrapro V6.0 for Windows. The results are presented as a function of compositional mismatch. The van Laar mixing rule or binary interaction model is used to obtain the compositional window of miscibility. The ones in the entire compostional range (n×m×k×1 or n ⁴) of the terpolymer. The compositional mismatch was defined as the variable. In this approach the compositional window for miscibility can be computed quicker (cN or n)