In Situ Study of ABC Triblock Terpolymer Self-Assembly under Solvent Vapor Annealing
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. de Bordeaux, Pessac (France)
We investigate the morphological evolution of two linear ABC triblock terpolymers, poly(1,1-dimethylsilacyclobutane-block-styrene-block-methyl methacrylate) (PDMSB-b-PS-bb-PMMA or DSM) and poly(1,1-dimethylsilacyclobutane-block-styrene-block-lactide) (PDMSB-b-PS-b-PLA or DSL), in situ during solvent vapor annealing using grazing-incidence small-angle X-ray scattering. The morphology, orientation, and period of the microdomains are characterized under a continuous solvent vapor flow of CHCl3 as a function of swelling ratio and deswelling rate. The 90 nm thick films of DSM form in-plane core–shell cylinders, while DSL films of 150 nm thickness predominantly form out-of-plane core–shell cylinders within perforated lamellae oriented parallel to the substrate. As a result, a reversible order–order phase transformation between spheres and cylinders and a reorientation from in-plane to out-of-plane cylinders occur during the annealing process.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1504877
- Report Number(s):
- BNL-211500-2019-JAAM
- Journal Information:
- Macromolecules, Vol. 52, Issue 4; ISSN 0024-9297
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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