Jump to main content
Jump to site search

Issue 66, 2014
Previous Article Next Article

Functional groups on POSS nanoparticles influence the self-assembled structures of diblock copolymer composites

Author affiliations

Abstract

We investigated the influence of the functional groups presented by polyhedral oligomeric silsesquioxane (POSS) nanoparticles (NPs) on the self-assembled structures formed by diblock copolymer composites. We blended two amorphous POSS derivatives, octakis[dimethyl(4-phenethyl)siloxy]silsesquioxane (OS-POSS) and octakis[dimethyl(4-hydroxyphenethyl)siloxy]silsesquioxane (OP-POSS), with the block copolymer poly(styrene-b-4-vinyl pyridine) (PS-b-P4VP). This long-range order transformed into distorted lamellar structures when we blended PS-b-P4VP with the OS-POSS NPs due to the relatively weak intermolecular hydrophobic forces between the aromatic groups of OS-POSS and the PS block segments. In contrast, we obtained well-defined self-assembled structures, in the form of block copolymer nanocomposites, after blending PS-b-P4VP with the OP-POSS NPs; an order–order morphological transition occurred upon increasing the content of OP-POSS NPs in the PS-b-P4VP diblock copolymer. Transmission electron microscopy and small-angle X-ray scattering revealed morphologies exhibiting high degrees of long-range order, namely lamellar structures at low OP-POSS NP contents, hexagonally packed cylindrical structures at higher OP-POSS NP contents, and a body-centered cubic spherical structure at the highest OP-POSS NP content, due to relatively strong hydrogen bonding interactions between the OH groups of the OP-POSS NPs and the pyridyl groups of the P4VP block segments.

Graphical abstract: Functional groups on POSS nanoparticles influence the self-assembled structures of diblock copolymer composites

Back to tab navigation

Publication details

The article was received on 24 Jun 2014, accepted on 04 Aug 2014 and first published on 04 Aug 2014


Article type: Paper
DOI: 10.1039/C4RA06193D
Author version
available:
Download author version (PDF)
Citation: RSC Adv., 2014,4, 34849-34859

  •   Request permissions

    Functional groups on POSS nanoparticles influence the self-assembled structures of diblock copolymer composites

    Y. Lu and S. Kuo, RSC Adv., 2014, 4, 34849
    DOI: 10.1039/C4RA06193D

Search articles by author

Spotlight

Advertisements