The structural mechanism of polymer nanocomposites filled with organoclay on a suprasegmental level was studied. Within the framework of this mechanism, the nanocomposites elasticity modulus is defined by local order domains (nanoclusters), with sizes similar to natural nanocomposites (polymers). Densely-packed interfacial regions which form in nanocomposites at nanofiller introduction is the physical basis of decrease in the size of nanoclusters.
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The kinetic modelling of styrene with controlled radical polymerization, initiated by 2,2’-asobis(isobutirnitrile) and proceeded by a reversible chain transfer mechanism was carried out and accompanied by «addition-fragmentation» in the presence of dibenzyltritiocarbonate. An inverse problem of determining of the unknown temperature dependences of single elementary reaction rate constants of the kinetic scheme was solved. The adequacy of the model was revealed by comparing the theoretical and experimental values of polystyrene’s molecular-mass properties. The influence of the process controlling factors on polystyrene’s molecular-mass properties was studied.
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