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One-Shot Synthesis and Melt Self-Assembly of Bottlebrush Copolymers with a Gradient Compositional Profile

Journal Article · · ACS Macro Letters
 [1];  [2];  [3];  [1]
  1. Univ. at Buffalo, The State Univ. of New York, Buffalo, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Univ. of Massachusetts, Amherst, MA (United States)
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Morphological control plays a central role in soft materials design. Herein, we report the synthesis of a gradient bottlebrush architecture and its role in directing molecular packing in the solid state. Bottlebrush copolymers with gradient interfaces were prepared via one-shot ring-opening metathesis polymerization of exo- and endo-norbornene-capped macromonomers. Kinetic studies revealed a gradient compositional profile separating the two blocks along the backbone. Side-chain symmetric gradient bottlebrush copolymers exhibited a strong tendency to assemble into cylindrical microstructures, in contrast to their block copolymer analogs with sharp interfaces. Furthermore such exquisite architectural control of the interfacial composition affords a delicate handle to direct macromolecular assembly.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0012704
OSTI ID:
1495003
Report Number(s):
BNL--211265-2019-JAAM
Journal Information:
ACS Macro Letters, Journal Name: ACS Macro Letters Journal Issue: 6 Vol. 7; ISSN 2161-1653
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

One-shot preparation of topologically chimeric nanofibers via a gradient supramolecular copolymerization journal October 2019

Figures / Tables (6)

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Table 1(p. 5)table Table 1
Figure 4(p. 6)figure Figure 4
Figure 5(p. 6)figure Figure 5

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Related Subjects

36 MATERIALS SCIENCE
bottlebrush copolymers
gradient copolymers
morphology
norbornene reactivity
self-assembly