Solvent Annealing Thin Films of Poly(isoprene-b-lactide)
The use of solvent annealing to control the microdomain orientation and long-range ordering in poly(isoprene-b-{sub D, L}-lactide) thin films was investigated using scanning force microscopy and grazing incidence small angle X-ray scattering (GISAXS). Benzene and chloroform were used as annealing solvents. Both were found to improve the long-range order in the films. Additionally, at high concentrations of chloroform in the film, a perpendicular orientation of cylinders was observed where the solvent was able to mediate interfacial interactions sufficiently to prevent a preferential segregation of one of the blocks to the surface. In situ GISAXS measurements made during solvent swelling and evaporation allowed an examination of the film morphology over a wide range of solvent concentrations providing a efficient route to optimize conditions for morphology control by solvent annealing.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 913842
- Report Number(s):
- BNL-78410-2007-JA; POLMAG; TRN: US200804%%101
- Journal Information:
- Polymer, Vol. 46, Issue 25; ISSN 0032-3861
- Country of Publication:
- United States
- Language:
- English
Similar Records
An in situ GISAXS study of selective solvent vapor annealing in thin block copolymer films: Symmetry breaking of in‐plane sphere order upon deswelling
Well-Ordered Nanoporous ABA Copolymer Thin Films via Solvent Vapor Annealing, Homopolymer Blending, and Selective Etching of ABAC Tetrablock Terpolymers