Abstract
Graft copolymers consisting of poly(oxytetramethylene) primary chain and distinctly engineered molecularly uniform oligo(N-alkylurethane) side chains with two constitutional units were synthesized and investigated by thermal and dynamic mechanical analysis. Microphase-separated systems with semicrystalline oligourethane hard domains and exhibiting the characteristic properties of thermoplastic elastomers were observed for graft copolymers either with a spacer between the polyether backbone and the side chain or with specifically interacting graft end groups. The properties were correlated with contributions of special side chain interactions and main chain-side chain coupling to the segregation and packing of the oligourethane branches.
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