INVESTIGATION ON THE SURFACE ORIENTATION OF CYLINDRICAL MICRODOMAINS IN STYRENE-BUTADIENE-STYRENE TRIBLOCK COPOLYMERS BY SCANNING FORCE MICROSCOPY TRANSMISSION ELECTRON-MICROSCOPY

Citation
E. Gattiglia et al., INVESTIGATION ON THE SURFACE ORIENTATION OF CYLINDRICAL MICRODOMAINS IN STYRENE-BUTADIENE-STYRENE TRIBLOCK COPOLYMERS BY SCANNING FORCE MICROSCOPY TRANSMISSION ELECTRON-MICROSCOPY, Macromolecular rapid communications, 16(12), 1995, pp. 919-925
Citations number
27
Categorie Soggetti
Polymer Sciences
ISSN journal
10221336
Volume
16
Issue
12
Year of publication
1995
Pages
919 - 925
Database
ISI
SICI code
1022-1336(1995)16:12<919:IOTSOO>2.0.ZU;2-5
Abstract
The orientation of the microdomains at the free surface of solvent-cas t films of a polystyrene-block-polybutadiene-block-polystyrene tribloc k copolymer with cyclindrical morphology was studied by coupling trans mission electron and scanning force microscopies (SFM-TEM). It was fou nd that the cylinders of polystyrene, which are assembled in grains ra ndomly oriented in the bulk, tend to reorient with the main axis perpe ndicular to the surface. SFM investigation indicates that the hexagona l symmetry of the cylinders is also maintained at the free surface whi ch is characterized by protrusions and corrugation with size and chara cteristic distances closely related to the cylindrical morphology visi ble in the bulk. Good quantitative agreement between TEM and SFM measu rements is observed.