No abstract

No abstract

ABSTRACT:The proposed technique allows determination of variation in a macromolecular coil structure of dimethyl diallyl ammonium chloride, characterized by its fractal dimension, during polymerization. It is shown that this one factor, unaccounted for in conventional theories, determines the most important characteristics of a polymerization process: rate, output of a finite product, and molecular weight. Further, the methods of fractal kinetics allow the quantitative description of synthesis of polymers and, in particular, give the correct shape of the conversion degreetime kinetic curve.

The N-pentafluorophenyl-exo-endo-norbornene-5,6-dicarboximide (2a) and N-phenyl-exo-endo-norbornene-5,6-dicarboximide (2b) monomers were synthesized and polymerized via ring-opening metathesis polymerization (ROMP) using bis(tricyclohexylphosphine) benzylidene ruthenium(IV) dichloride (I) and tricyclohexylphosphine [1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2ylidene][benzylidene] ruthenium dichloride (II). Both catalysts were used to synthesize random and block high molecular weight copolymers which were further hydrogenated using a Wilkinson's catalyst. Then, the saturated copolymers were modified by reacting with sodium 4-hydroxybenzenesulfonate dihydrate to generate new ionomers with fluoro-sulfonic acid pendant groups.

No abstract