Chemically resistant isoporous crosslinked block copolymer structure

A method of preparing a self-assembled multiblock crosslinked polymer material, comprising:

• a) forming an isoporous structure comprising macropores and mesopores, from a multi-block copolymer material, wherein the multi-block copolymer material comprises polymer chains, wherein polymer chain comprises a first distinct block which is a poly(4-vinylpyridine);
• and
• wherein the forming includes allowing the multi-block copolymer material to self assemble into a bulk layer having a thickness of 2 microns to 500 microns and a second layer having a thickness of 5 nm to 500 nm, wherein the bulk layer comprises macropores having a size of 200 nm to 100 microns, wherein the second layer comprises mesopores having a size of 1 nm to 200 nm, and wherein a portion of macropores and/or mesopores are isoporous;
• and
• b) then crosslinking a portion of the first distinct block with a second distinct block which is a poly(4-vinylpyridine);
• wherein the first and second distinct blocks are on different polymer chains;
• and wherein the crosslinking agent is selected from the group consisting of (a) a molecule having two α,β-unsaturated carbonyl groups, bonded through their respective β-carbons, to a C1-C12 unsaturated or saturated carbon chain;
• and (b) a molecule having one α,β-unsaturated carbonyl group bonded from the β carbon to a C1-C12 unsaturated or saturated carbon chain comprising a CH2—I group.