Synthesis of highly dispersed, block copolymer‐grafted TiO 2 nanoparticles within neat block copolymer films

Hailu, Shimelis T.; Samant, Saumil; Grabowski, Christopher; Durstock, Michael; Karim, Alamgir; Raghavan, Dharmaraj

doi:10.1002/pola.27460

Synthesis of highly dispersed, block copolymer‐grafted TiO ₂ nanoparticles within neat block copolymer films

Journal Article · Sun Nov 23 23:00:00 EST 2014 · Journal of Polymer Science. Part A, Polymer Chemistry

DOI:https://doi.org/10.1002/pola.27460· OSTI ID:1400501

Hailu, Shimelis T. ^[1]; Samant, Saumil ^[2]; Grabowski, Christopher ^[3]; Durstock, Michael ^[3]; Karim, Alamgir ^[2]; Raghavan, Dharmaraj ^[1]

Department of Chemistry Howard University Washington DC 20059
Department of Polymer Engineering University of Akron Akron Ohio 44325
Air Force Research Lab, Wright‐Patterson Air Force Base Dayton Ohio 45433

ABSTRACT

The objective of the study is to formulate exclusive block copolymer (BCP) nanocomposites by dispersing bcp end‐grafted nanoparticles (bcp‐ g ‐nps) of PMMA‐ b ‐PS‐ g ‐TiO ₂ within PS‐ b ‐PMMA matrix. PMMA‐ b ‐PS‐ g ‐TiO ₂ is synthesized using a “grafting‐to” approach and characterized by XPS and TGA to establish that the copolymer chains were bonded to NPs. Good dispersion of bcp‐ g ‐nps in PMMA and PS‐PMMA bcp films is observed, in contrast to poor dispersion in PS films. In PS‐PMMA films, the compatible and identical bcp nature of the end‐grafted polymer, and large NP size caused it to span across entire PS‐PMMA domains. Poor and good dispersion in PS and PMMA matrices, respectively, can be rationalized by the fact that NPs interactions are driven by the PMMA at the outer corona of the bcp‐ g ‐nps. Developing bcp‐ g ‐nps as a strategic route to preparation of highly dispersed high permittivity NPs like titanium dioxide (TiO ₂ ) in bcp matrix can have important ramifications for energy storage devices. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015 , 53 , 468–478

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

OSTI ID:: 1400501

Alternate ID(s):: OSTI ID: 1229439

Journal Information:: Journal of Polymer Science. Part A, Polymer Chemistry, Journal Name: Journal of Polymer Science. Part A, Polymer Chemistry Journal Issue: 3 Vol. 53; ISSN 0887-624X

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: United States

Language:: English

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