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<p>Segregation of polymer chains of different molecular weights is a well-known process. A traditional experimental approach of studying phase segregation of thin films composed of polymer blends with identical chemical compositions but different molecular weights, was focused on functionalization of chemical group or modification of end-group. In this study however, a different approach was proposed, in which polystyrene with a bimodal molecular weight distribution but no additional chemicaldoi:10.26434/chemrxiv.14054033.v3 fatcat:ne3phtdbmnh73foqdgwdinqvla