Influence of crystallinity on the morphology of poly(ethylene oxide) containing diblock copolymers

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Abstract

Low-molecular-weight poly(ethylene oxide)-polyalkane (PEO-PA) diblock copolymers have been examined between the order-disorder transition and PEO melting temperature using small-angle neutron scattering (SANS), differential scanning calorimetry (DSC), and dynamic mechanical spectroscopy (DMS). Crystallization imposes layered ordering with polymer stems oriented perpendicular, or tilted, relative to the microdomain interface, thereby disrupting conventional amorphous microdomain morphologies. This effect can be used to switch the high symmetry bicontinuous ordered G phase to lower symmetry cylinders or lamellae.

Original languageEnglish (US)
Pages (from-to)121-130
Number of pages10
JournalMacromolecular Symposia
Volume117
DOIs
StatePublished - May 1997

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