Schematic illustration of polymer interfacial diffusion. (IMAGE)
Caption
Even when their chemical compositions are identical, two linear polymers do not mix at the interface (left). When one is changed into a ring polymer, however, the interface mixes over a much broader region through a “threading” effect in which the linear chain passes through the ring (right). The only difference between the two cases is the molecular topology.
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© ACS Central Science, originally published in ACS Central Science
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