3 years ago

Tricontinuous Nanostructured Polymers via Polymerization-Induced Microphase Separation

Tricontinuous Nanostructured Polymers via Polymerization-Induced Microphase Separation
Stacey A. Saba, Marc A. Hillmyer, Bongjoon Lee
Nanostructured tricontinuous block polymers allow for the preparation of single-component materials that combine multiple properties. We demonstrate the synthesis of a mesoporous material from the selective orthogonal etching of a microphase-separated tricontinuous block polymer precursor. Using the synthetic approach of polymerization-induced microphase separation (PIMS), divinylbenzene (DVB) is polymerized from a mixture of poly(isoprene) (PI) and poly(lactide) (PLA) macro-chain transfer agents. In the PIMS process in situ cross-linking by the DVB arrests structural coarsening, resulting in a disordered block polymer morphology that we posit exhibits three nonintersecting continuous domains. Selective etching of the PI domains by olefin cross metathesis and PLA domains by hydrolytic degradation produces a mesoporous polymer with two independent pore networks arising from the different etch mechanisms.

Publisher URL: http://dx.doi.org/10.1021/acsmacrolett.7b00677

DOI: 10.1021/acsmacrolett.7b00677

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