A model graft copolymer material consisting of polystyrene (PS) chains grafted onto a poly(ethyl acrylate) backbone was studied by small-angle neutron scattering (SANS) and neutron reflectivity. This 28 wt% PS graft material exhibited a lamellar phase morphology; it also produced abnormal butterfly isointensity patterns in SANS when uniaxially strained. It is believed that the polydispersity in structure of the copolymers is critical in producing the unexpected lamellar morphology.
Посилання на статтю:
Small-angle neutron scattering and neutron reflectometry study of a model graft copolymer / W. D. Dozier* and P. Thiyagarajan // Polymer. – 1994. – Vol 35. – P. 3116-3118.