Copolymerisation

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polymer copolymerisation kineticsCopolymerisation

Dec 9, 2020•Download as PPTX, PDF•Research Article| June 01 1944

The Mechanism of Copolymerization

Turner Alfrey, Jr.;

G. Goldfinger

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J. Chem. Phys. 12, 205–209 (1944)

https://doi.org/10.1063/1.1723934

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The mechanism of catalytic copolymerization of two monomers A and B is treated with the the aid of steady state approximation. Two initiation and two termination rates are assumed, one for each monomer. Four propagation rates are considered, corresponding to the four possibilities of addition, namely, addition of monomer A to a chain ending in A* or to a chain ending in B* and addition of monomer B to a chain ending in A* or to a chain ending in B*. Over‐all rate and number average molecular weight are calculated. The composition of the polymer and the number distribution curves of groups of submolecules a and of submolecules b are calculated as functions of the monomer composition and two rate constant ratios. These last results are of general character and independent of the nature of the initiation and termination processes provided that the average degree of polymerization is ``high.''

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5 likes•2,711 views

SHUBHAMPRASAD61

polymer copolymerisation kinetics

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CopolymerisationDec 9, 2020•Download as PPTX, PDF•5 likes•2,711 viewsSHUBHAMPRASAD61polymer copolymerisation kineticsCopolymerisationDec 9, 2020•Download as PPTX, PDF•

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Dear Muhammad Amjad, please read the book of Odian "Principles of Polymerization". Free radical (co)polymerization goes through 4 steps: initiation, propagation, chain transfer, and termination. For the copolymerization, reactivity ratios is the governing tool for the preferential selectivity of addition reaction of the propagating chains towards both monomers. Styrene and acrylates are conventional monomers, well studied in copolymerization, so their data concerning reactivity are tabulated in polymerization textbooks. My Regards