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- W1990611345 abstract "Abstract In this paper, the well-defined diblock copolymers consisting a linear polyethylene (LPE) and a poly(ethylene oxide) (PEO), LPE- b -PEO, were synthesized by combining the ethylene living coordination polymerization with fluorinated bis(phenoxyimine) titanium catalyst and the living ring-opening polymerization of ethylene oxide initiated by hydroxyl-terminated polyethylene (LPE–OH) as a macromolecular initiator. We describe two methodologies for the self-assembly of LPE- b -PEO, namely temperature-induced self-assembly and crystallization-driven self-assembly. Transmission electron microscopy (TEM), atomic force microscopy (AFM) and dynamic light scattering (DLS) are employed to characterize the morphology, structure and hydrodynamic radius ( R h ) of the self-assembled micelles. LPE- b -PEO is dissolved to form a molecular solution in trichlorobenzene (TCB) at 140 °C, while self-assembly could be driven when the crystallization of LPE blocks is induced by cooling to form diamond-shaped micelles with a mono-layer crystallized LPE lamella core. The resultant diblock copolymers can self-assemble into spherical micelles composed of a molten LPE core and a soluble PEO corona in DMF at 140 °C, that is above the melting temperature ( T m ) of the LPE block. As the temperature decrease, the morphology changes from spherical to platelet-like micelle with a double-layer crystallized LPE lamella core sandwiched by solvent-swollen PEO corona. Furthermore, the confined crystallization of LPE block in nanosized self-assembled micelle core is investigated by differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXRD)." @default.
- W1990611345 created "2016-06-24" @default.
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- W1990611345 date "2013-03-01" @default.
- W1990611345 modified "2023-09-30" @default.
- W1990611345 title "Temperature-induced and crystallization-driven self-assembly of polyethylene-b-poly(ethylene oxide) in solution" @default.
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- W1990611345 doi "https://doi.org/10.1016/j.polymer.2013.01.044" @default.
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