Dynamics of Multi-component Polymer Melts

bidisperse melts birefringence blend components blend composition block copolymers calculated chain segments Chapter characteristic relaxation constraint release decreased deformed detector deuterated deuterium dichroism and birefringence DiMarzio dynamic moduli elastomer entropy Equation experimental results flow cell following a step Frac friction coefficient function increasing interac isotopically labeled linear viscoelastic log t(sec longer chains M/L blends magnitude measured miscible blend modulus molecular weight monodisperse monomeric friction coefficient observed obtained oligomers optical orientation correlations orientation relaxation orientational coupling effects orientational coupling interactions packing entropy parameter PEO chains PEO/PMMA blends plateau modulus PMMA PMMA chains poly(ethylene propylene polybutadiene polydispersity polyisoprene polymer chain polystyrene relaxation curves reptation rheological RHP model predictions Rouse model S/M blends Section segmental relaxation shorter component signal step strain step strain experiments stress relaxation superposition principle t-PB and d-PB t-PEP temperature dependence tensor terminal relaxation theoretical theory tion triblock viscoelastic volume fraction