Paul Flory (1910-2005) was a prominent American chemist known for his significant contributions to the field of polymer science. He is particularly famous for his work on the theories of polymer behavior and the development of new techniques for studying polymer materials. Flory was awarded the Nobel Prize in Chemistry in 1974 for his work in the development of the theory of macromolecules, which laid the groundwork for understanding the chemistry and physics of polymers.
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Paul Flory developed a lattice treatment of polymer solutions that accounts for the reduced mixing entropy of connected chain segments. A chain contributes many segments but remains one translating molecule.
This distinction helps explain why long-chain mixtures can separate under small unfavourable contact energies. Flory–Huggins solution theory connects molecular connectivity with the balance between mixing entropy and interaction energy.[ref]
Thermodynamics of High Polymer Solutions by Paul J. Flory. Lattice counting and combinatorial entropy
Portrait of Paul Flory
. Unidentified Associated Press photographer; press image labeled 1973; existing 3:4 crop by Materialscientist. Public domain in the United States: publication without copyright notice, 1931–1977. Source usage terms, via Wikimedia Commons. Source.