Abstract
Studies using transmission electron microscopy, differential scanning calorimetry, and X‐ray diffraction showed correlations between the crystallization behavior of the polydimethylsiloxane (PDMS) block and the morphology of the block copolymer poly(butadiene‐b‐dimethylsiloxane) (PB‐PDMS). When the PDMS component existed as spheres dispersed in a PB matrix, the crystallization rate of the PDMS block was lower than when the PDMS phase existed in rod or cylinder form.