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Side-Chain Length and Dispersity in ROMP Polymers with Pore-Generating Side Chains for Gas Separations.


ABSTRACT: Bottlebrush polymers with flexible backbones and rigid side chains have shown ultrahigh CO2 permeability and plasticization resistance for membrane-based gas separations. To date, this class of polymers has only been studied with polydisperse side chains. Herein, we report gas transport properties of a methoxy (OMe) functionalized polymer synthesized via ring-opening metathesis polymerization (ROMP) with uniform side-chain lengths ranging from n = 2 to 5 repeat units to elucidate the role of both side-chain length and dispersity on gas transport properties and plasticization resistance. As side-chain length increased, both Brunauer-Emmett-Teller (BET) surface area and gas permeability increased with minimal losses in gas selectivity. Increased plasticization resistance was also observed with increasing side-chain length, which can be attributed to increased interchain rigidity from longer side chains. Controlling the side-chain length provides an effective strategy to rationally control and optimize the performance of ROMP polymers for CO2-based gas separations.

SUBMITTER: Benedetti FM 

PROVIDER: S-EPMC9326822 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature

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Side-Chain Length and Dispersity in ROMP Polymers with Pore-Generating Side Chains for Gas Separations.

Benedetti Francesco M FM   Wu You-Chi Mason YM   Lin Sharon S   He Yuan Y   Flear Erica E   Storme Kayla R KR   Liu Chao C   Zhao Yanchuan Y   Swager Timothy M TM   Smith Zachary P ZP  

JACS Au 20220707 7


Bottlebrush polymers with flexible backbones and rigid side chains have shown ultrahigh CO<sub>2</sub> permeability and plasticization resistance for membrane-based gas separations. To date, this class of polymers has only been studied with polydisperse side chains. Herein, we report gas transport properties of a methoxy (OMe) functionalized polymer synthesized via ring-opening metathesis polymerization (ROMP) with uniform side-chain lengths ranging from <i>n</i> = 2 to 5 repeat units to elucida  ...[more]

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