Abstract
Small angle x-ray analyses show that the shear-induced hexagonal perforated layer phase in a poly(ethylene oxide)- -polystyrene diblock copolymer consists of trigonal ( ) twins and a hexagonal ( ) structure, with trigonal twins being majority components. Transmission electron microscopy reveals that the hexagonal structure is generated through sequential intrinsic stacking faults on the second layer from a previous edge dislocation line, while the trigonal twins are formed by successive intrinsic stacking faults on neighboring layers due to the plastic deformation under mechanical shear.
- Received 8 March 2001
DOI:https://doi.org/10.1103/PhysRevLett.86.6030
©2001 American Physical Society