1 SUPPORTING INFORMATION Tuning the mechanical properties of nanostructured ionomer films by controlling the extents of covalent crosslinking in core-shell nanoparticles Somjit Tungchaiwattana a , Robert Groves b , Peter A. Lovell a , Orawan Pinprayoon a and Brian R. Saunders a, * a Polymer Science and Technology Group, The School of Materials, The University of Manchester, Grosvenor Street, M1 7HS, UK. b Synthomer Ltd, Temple Fields, Harlow, Essex, CM20 2BH, U.K. Fig. S1. TEM images of deposited nanoparticles. Their identities are shown in each figure. The arrows in (c) show coalesced nanoparticles. The scale bars are 200 nm. (f) C100(2) (e) C50(2)S(1) (d) C75(4)S(0) (c) C100(4) (a) C50(0.5)S(1)H (b) C75(4)S(1) Electronic Supplementary Material (ESI) for Journal of Materials Chemistry This journal is © The Royal Society of Chemistry 2012