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Carboxylation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, H. Tanaka
Carboxylation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, H. Tanaka
William MacKnight
No abstract provided.
Sulfonation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, D. Rahrig, R. W. Lenz
Sulfonation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, D. Rahrig, R. W. Lenz
William MacKnight
Polypentenamer has been sulfonated using a 1:1 complex of sulfur trioxide and triethyl phosphate in chloroform. A range of polymers containing from 1.9 to 19. l mo! % sulfonate groups was prepared by this reagent and isolated in the form of sodium salts. These materials are initially free from covalent cross-links but cross-linking occurs with aging unless the polymers are stabilized with a free-radical scavenger such as hydroquinone. The unsaturated bonds in these materials can be removed by hydrogenation with pÂtoluenesulfonyl hydrazide. The hydrogenated derivatives are crystalline and no longer require a stabilizer to inhibit cross-linking. Both the unsaturated and …