Strongly segregated cubic microdomain morphology consistent with the double gyroid phase in high molecular weight diblock copolymers of polystyrene and poly(dimethylsiloxane)
We report the observation of a cubic phase consistent with the double gyroid structure in strongly segregated diblock copolymers of PS-b-PDMS over a volume fraction ({phi}{sub PDMS}) range of {approx}0.39 to 0.45. The samples have respective molecular weights of 127 kg/mol and 73 kg/mol and degree of segregation N{sub {chi}} equal to 187 and 106, respectively, at annealing temperature of 130 C. It is important to highlight that two out of the total four samples investigated, exhibited hexagonally close packed cylindrical domains of PDMS and alternating lamellae at {phi}{sub PDMS} = 0.39 and 0.45, respectively, indicating the possible narrow range of the DG morphology for the specific diblock copolymers.
- 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:
- 1019950
- Report Number(s):
- BNL-95796-2011-JA; TRN: US201115%%586
- Journal Information:
- Journal of Polymer Science Part B: Polymer Physics, Vol. 47, Issue 23; ISSN 0887-6266
- Country of Publication:
- United States
- Language:
- English
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