Tg of Acrylic Copolymers

It is possible by calculation to predict the Tg of a copolymer given the copolymer composition and the Tg of the homopolymers of the acrylic monomers used. [Pg.61]

WrTi2 is the weight fraction of monomer 2 in the copolymer Tgmi is the Tg of a homopolymer of monomer 1 in °K Tgm2 is the Tg of a homopolymer of monomer 2 in °K [Pg.61]

An acrylic copolymer of composition 70% methyl methacrylate (Tg 105°C) and 30% butyl acrylate (Tg -56°C) would have the following T, [Pg.61]

The above example illustrates the effect, on the final copolymer Tg, of using a soft monomer (butyl acrylate) and a hard monomer (methyl methacrylate) in combination. [Pg.61]

The above equation assumes a linear relationship between weight composition and Tg. This is normtdly the case with acrylic polymers. However, some monomer combinations do show differences between the calculated and theoretical values of T . [Pg.61]

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