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Towards Tailored Porous Polymers Using Solvent Effects in Catalytic Degradation

DOI: 10.1002/mame.v298.12 DOI Help

Authors: Kyra L. Sedransk (University of Cambridge) , James Mcgregor (University of Sheffield) , Jonathan Mitchell (University of Cambridge) , Geoffrey D. Moggridge (University of Cambridge)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Macromolecular Materials And Engineering , VOL 298 , PAGES 1344 - 1349

State: Published (Approved)
Published: December 2013

Abstract: The potential for tailored synthesis of porous materials using catalytic degradation of block copolymers has been shown, employing an adaptable one-pot method. Carefully selected solvent systems help to control the pore size and molecular weight of the product. In the degradation of PS–PB–PS, 2nd Generation Grubbs' catalyst creates scissions in the PB carbon–carbon double bonds resulting in the formation of a porous structure. Critically, methanol is used to maintain the integrity of the polymeric structure during this etching. Catalyst deactivation effected by methanol can be limited through using an excess of 1-hexene; thereby introducing a competitive metathesis process. Altering the ratio of the co-solvents employed further controls the degradation of PS–PB–PS and hence the resulting pore structures.

Journal Keywords: block copolymers; metathesis; porous polymer; second Generation Grubbs' catalyst; solvent effects

Subject Areas: Chemistry, Materials

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Added On: 12/04/2017 08:56

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