Simple solid-state 1H NMR methods are applied to the design of tailored chain architectures that maximize interfacial contacts in block copolymers whose individual chemical components have a Tg difference equal to 200 K. Using a combination of variable temperature static, MAS, and spin-diffusion measurements, quantitative determination of bulk rigidity, the amount of low-Tg component partitioned in both soft and hard phases, and the amount of high-Tg component partitioned in each phase is possible. We show that the synthesis conditions can be changed to vary the partitioning of each gradient copolymer component in a systematic way by introducing variations in chain topology, and propose that the interphase between the hard and soft domains is responsible for differential partitioning.

Simple solids NMR experiments reveal routes to tailored interfaces in copolymers

255th National Meeting (2018)

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