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Remarks on copolymer sequence distributions
Author(s) -
Strate Gary Ver
Publication year - 1970
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1970.070141007
Subject(s) - comonomer , crystallinity , copolymer , monomer , polymer , polymer chemistry , sequence (biology) , thermodynamics , materials science , melting point , constant (computer programming) , polymer science , chemistry , physics , composite material , computer science , biochemistry , programming language
Distribution functions for the unit X in copolymers of the typeare given. These functions have been used to calculate the expected degree of crystallinity using the Flory theory of copolymer crystallinity. The calculations indicate that differences can be expected between polymers prepared from XA and XX on the one hand and A and X on the other when the kinetics constants of the polymer‐forming reactions are identical. In addition, it has been shown that the Flory results carry over to the terpolymer case with the propagation probability given in its terpolymerization form. The addition of more than one comonomer can lead to increased or decreased crystallinity with a given constant melting point, depending on whether the noncrystallizable monomers tend to alternate or “block” with one another.