Jump to main content
Jump to site search


Impact of backbone composition on homopolymer dynamics and brush block copolymer self-assembly

Author affiliations

Abstract

Four series of brush block copolymers (BBCP), with near identical side chain compositions but varying backbone structures, were synthesized to investigate the effect of backbone structure on the process of thermal BBCP self-assembly to photonic crystals (PCs). Each of the self-assembled PC films was examined by reflection measurements, small angle X-ray scattering measurements, and scanning electron microscopy to compare the resulting properties of the polymeric photonic crystal and the nanostructured morphology impacted by the backbone structure. It was found that the composition of the brush backbone within a BBCP has a dramatic effect on the ability of the BBCP to self-assemble into ordered nanostructures and on the local ordering of the nanostructure morphology accessed with higher molecular weight (MW) BBCPs (>1500 kg mol−1). BBCPs with a norbornene imide-based backbone were able to thermally self-assemble to longer wavelength reflecting PCs and had higher fidelity ordering of lamellar nanostructures with higher MW polymers. By analyzing the melt rheological responses of the backbone compositions, both as linear polymers and homobrush polymers, it was concluded that the inherent fragility of the backbone promotes enhanced local ordering in the lamellar nanostructure morphology as well as access to larger domain sizes.

Graphical abstract: Impact of backbone composition on homopolymer dynamics and brush block copolymer self-assembly

Back to tab navigation

Supplementary files

Article information


Submitted
14 Jul 2020
Accepted
18 Sep 2020
First published
21 Sep 2020

Polym. Chem., 2020, Advance Article
Article type
Paper

Impact of backbone composition on homopolymer dynamics and brush block copolymer self-assembly

B. M. Boyle, J. L. Collins, T. E. Mensch, M. D. Ryan, B. S. Newell and G. M. Miyake, Polym. Chem., 2020, Advance Article , DOI: 10.1039/D0PY01007C

Social activity

Search articles by author

Spotlight

Advertisements