Investigation of Blend Miscibility of a Ternary PS/PCHMA/PMMA System Using SIMS and Mean-Field Theory

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Macromolecules

DOI:https://doi.org/10.1021/ma051595r· OSTI ID:913758

Harton, S; Koga, T; Stevie, F; Araki, T; Ade, H

Poly(cyclohexyl methacrylate) (PCHMA) and polystyrene (PS) are miscible with each other, but each is highly immiscible with PMMA. Identifiable by the asymmetries in the binary mean-field interaction parameters {chi}, PS preferentially segregates to the PCHMA/PMMA interface. Secondary ion mass spectrometry was used to provide real-space depth profiles of deuterated PS (dPS) in a miscible blend with PCHMA. The initial dPS concentration was varied from 5 to 20% (v/v), and the blend film was annealed at 150 C on a film of PMMA for 42 h. X-ray reflectometry was used to determine the interfacial width between PCHMA and PMMA at 150 C. Using self-consistent mean-field theory, good agreement was found between the experimental and theoretical interfacial excess Z* of dPS at each concentration. Because of their similar glass transition temperatures ({approx}100 C for PS and PCHMA) and the ability of PS and PCHMA to be controllably synthesized with low polydispersities, we anticipate this blend to be a model system for future investigations of such phenomena as diffusion in miscible blends and diffusion near surfaces and interfaces.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 913758
• Report Number(s): BNL--78326-2007-JA
• Journal Information: Macromolecules, Journal Name: Macromolecules Vol. 38
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
COMPATIBILITY
INTERFACES
ION MICROPROBE ANALYSIS
MASS SPECTROSCOPY
MEAN-FIELD THEORY
MIXTURES
PMMA
POLYSTYRENE
SOLUBILITY
TRANSITION TEMPERATURE
national synchrotron light source