Broadband dielectric spectroscopy 1 Cooperativity 1 Dendrimers 1 Dielectric properties 1 Dielectric relaxation 1 Dielectric relaxation spectra 1 Electrical conductivity 1 Ethylene 1 Ethylene oxides 1 Glass transition 1 Macromolecular cooperativity 1 Molecular orientation 1 Poly(epichlorohydrin-co-ethylene oxide) 1 Polyepichlorohydrin 1 Protonic conductivities 1 Segmental dynamics 1 Thermoanalysis 1 broadband dielectric spectroscopy 1 dielectric relaxation spectra 1 electrical and protonic conductivity macromolecular cooperativity 1 poly(epichlorohydrin-co-ethylene oxide) 1 segmental dynamics 1