Equilibrium phase compositions of heterogeneous copolymers | Zendy

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Equilibrium phase compositions of heterogeneous copolymers

Author(s) -

Bauer Barry J.

Publication year - 1985

Publication title -

polymer engineering and science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.503

H-Index - 111

eISSN - 1548-2634

pISSN - 0032-3888

DOI - 10.1002/pen.760251706

Subject(s) - copolymer , materials science , polymer , spinodal , phase (matter) , chemical composition , monomer , thermodynamics , distribution function , molar mass distribution , phase diagram , polymer chemistry , chemistry , organic chemistry , composite material , physics

The products of random copolymerizations are heterogeneous in chemical composition, having a distribution of the fraction of each monomer in the copolymer. Polymer molecules with the same composition and molecular weight can be treated as separate components in a polymer blend. The spinodal limit is a simple function of chemical heterogeneity. The equilibrium number of phases, phase volumes, and average composition can be calculated from the condition that the chemical potential of a polymer species is equal in every phase. Phase diagrams are calculated for various hypothetical chemical distributions as well as a distribution characteristic of a random acrylonitrilebutadiene copolymerization to high conversion.

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