Surface morphology studies of multiblock and starblock copolymers of poly(a-methyl styrene) and poly (dimethyl siloxane)

Conference · Thu Dec 30 23:00:00 EST 1993

OSTI ID:141667

Chen, X; Gardella, Jr, J A ^[1]; Kumler, P L ^[2]

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1. State Univ. of New York, Buffalo, NY (United States)
2. State Univ. of New York College, Fredonia, NY (United States)

Surface morphology and compositions of multiblock and starblock copolymers of poly(a-methyl styrene) (PMS) and poly(dimethyl siloxane) (PDMS) were investigated by cross-sectional transmission electron microscopy, angle- and energy-dependent ESCA, and infrared spectroscopy. The extent of surface segregation of PDMS was determined for multiblock and starblock copolymers to depth of 210{angstrom}. No surface excess was with high PDMS bulk concentrations (60 wt%) have a highly oriented lamellar morphology in the near air surface region, and the topmost air surface region (27 {angstrom}) is exclusively composed of PDMS. The PMS-PDMS block copolymers with lower PDMS bulk concentrations (40 wt%) have lesser or no domain orientation and the surface region includes detectable PMS.

• OSTI ID: 141667
• Report Number(s): CONF-930304--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
COPOLYMERIZATION
COPOLYMERS
METHYL RADICALS
MORPHOLOGY
POLYSTYRENE
SILOXANES
SURFACE PROPERTIES