U. Maschke et al., ELASTIC COHERENT NEUTRON-SCATTERING FROM MIXTURES OF TRIBLOCK COPOLYMERS AND HOMOPOLYMERS IN THE HOMOGENEOUS BULK STATE, Macromolecules, 26(23), 1993, pp. 6197-6202
The coherent elastic scattering structure factor for mixtures of tribl
ock copolymers and homopolymers in the homogeneous bulk state is descr
ibed using the random-phase approximation and incompressibility constr
aint. Mathematical expressions have been developed for the small q-reg
ion as well as for the large q-limit. Small-angle neutron scattering e
xperiments were performed on mixtures of triblock copolymers made of d
euterated and hydrogenated poly(dimethylsiloxane) (PDMS) blocks and de
uterated PDMS homopolymers. The experimental results are in good agree
ment with the theoretical predictions.