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Start Over Author "Pitet, Louis M." Journal macromolecules
12 results on '"Pitet, Louis M."'

6. Branched Block Copolymers for Tuning of Morphology and Feature Size in Thin Film Nanolithography.

Author

Hiroki Minehara, Pitet, Louis M., Kim, Sangwon, Zha, R. Helen, Meijer, E. W., and Hawker, Craig J.

Subjects
*BLOCK copolymers, *CHEMICAL synthesis, *MORPHOLOGY, *DIMETHYLPOLYSILOXANES, *NANOLITHOGRAPHY, *DIBLOCK copolymers
Abstract

A library of Y-shaped poly(dimethylsiloxane) (PDMS)-b-poly(d,l-lactide) (PLA) diblock copolymers and their corresponding linear counterparts were synthesized, and their morphologies and feature sizes in bulk and thin films were compared using small-angle X-ray scattering (SAXS), scanning force microscopy (SFM), and grazing incidence small-angle X-ray scattering (GI-SAXS). For macromolecular isomers with approximately the same molecular weights and volume fractions (PLA fL: 0.20 and 0.35), different thin film morphologies were obtained for the Y-shaped PDMS-b-PLA derivatives when compared to the corresponding linear derivatives. These data also gave us the option to determine some of the key parameters of these block copolymers. A relatively high χ value of 0.24 was found for these PDMS-b-PLA systems and was shown to be influenced by architecture. [ABSTRACT FROM AUTHOR]

Published
2016
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