<abstract abstract-type="toc"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <graphic position="anchor" id="ga" xlink:href="ark:/27927/pgjn2m4b42" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" />A crystalline/crystalline iPP/iPB alloy was synthesized to illustrate the sequential two-stage polymerization mechanism and active site distribution during this process.</p> </abstract>