Cover Image, Volume 50, Issue 2


original image

Block-selective polydispersity strongly influences the structure formation in block copolymer/homopolymer blends, as presented by Michael R. Bockstaller and colleagues on page 106. In particular, block-selective polydispersity decreases the solubility of homopolymer within the narrowdisperse block of the copolymer and drives the segregation of the filler to the center of the narrowdisperse host copolymer domain. This gives rise to a pronounced increase of the domain period with increasing amount of homopolymer and promotes the formation of phase coexistence regimes. The picture presents a processed electron micrograph revealing gyroid/lamellar coexistence.