Abstract

The coherent elastic scattering structure factor for mixtures of triblock copolymers and homopolymers in the homogeneous bulk state is described using the random-phase approximation and incompressibility constraint. Mathematical expressions have been developed for the small q-region as well as for the large q-limit. Small-angle neutron scattering experiments were performed on mixtures of triblock copolymers made of deuterated and hydrogenated poly(dimethylsiloxane) (PDMS) blocks and deuterated PDMS homopolymers. The experimental results are in good agreement with the theoretical predictions

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