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Abstract
We report the facile synthesis of well-defined ABA poly(lactide)-block-poly(styrene)-block-poly(lactide) (LSL) triblock copolymers having a disperse poly(styrene) midblock (D= 1.27-2.24). The direct synthesis of telechelic α,-hydroxypoly(styrene) (HO-PS-OH) midblocks was achieved using a commercially available difunctional free radical diazo initiator 2,2′-azobis[2-methyl-N-(2-hydroxyethyl)propionamide]. Poly(lactide) (PLA) end blocks were subsequently grown from HO-PS-OH macroinitiators via ring-opening transesterification polymerization of (±)-lactide using the most common and prevalent catalyst system available, tin(II) 2-ethylhexanoate. Fourteen LSL triblock copolymers with total molar masses Mn,total = 24-181 kg/mol and PLA volume fractions fPLA = 0.15-0.68 were synthesized and thoroughly characterized. The self-assembly of symmetric triblocks was analyzed in the bulk using small-angle X-ray scattering and in thin films using grazing incidence small-angle X-ray scattering and atomic force microscopy. We demonstrate both the bulk and thin film self-assembly of LSL disperse triblocks gave well-organized nanostructures with uniform domain sizes suitable for nanopatterning applications.
Original language | English (US) |
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Pages (from-to) | 8031-8040 |
Number of pages | 10 |
Journal | Macromolecules |
Volume | 49 |
Issue number | 21 |
DOIs | |
State | Published - Nov 8 2016 |
Bibliographical note
Publisher Copyright:© 2016 American Chemical Society.
How much support was provided by MRSEC?
- Shared
Reporting period for MRSEC
- Period 3
Fingerprint
Dive into the research topics of '"Uncontrolled" Preparation of Disperse Poly(lactide)-block-poly(styrene)-block-poly(lactide) for Nanopatterning Applications'. Together they form a unique fingerprint.-
MRSEC IRG-3: Hierarchical Multifunctional Macromolecular Materials
Reineke, T. M., Bates, F. S., Dorfman, K., Dutcher, C. S., Hillmyer, M. A., Lodge, T., Morse, D. C., Siepmann, I., Barreda, L. & Ganewatta, M. S.
1/1/98 → …
Project: Research project
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MRSEC Program
THE NATIONAL SCIENCE FOUNDATION, UNIVERSITY OF TEXAS RIO GRANDE VALLEY
8/1/98 → 10/31/20
Project: Research project