Type

Journal Article

Authors

Michael A. Morris
Justin D. Holmes
Matthew T Shaw
Ramsankar Senthamaraikannan
Sozaraj Rasappa
Dipu Borah

Subjects

Engineering

Topics
sensitivity block copolymers self assembly pattern formation thermal processing polystyrene polymer random

The sensitivity of random polymer brush-lamellar polystyrene-b-polymethylmethacrylate block copolymer systems to process conditions. (2012)

Abstract The use of random copolymer brushes (polystyrene-r-polymethylmethacrylate - PS-r-PMMA) to 'neutralise' substrate surfaces and ordain perpendicular orientation of the microphase separated lamellae in symmetric polystyrene-b-polymethylmethacrylate (PS-b-PMMA) block copolymers (BCPs) is well known. However, less well known is how the brushes interact with both the substrate and the BCP, and how this might change during thermal processing. A detailed study of changes in these films for different brush and diblock PS-b-PMMA molecular weights is reported here. In general, self-assembly and pattern formation is altered little, and a range of brush molecular weights are seen to be effective. However, on extended anneal times, the microphase separated films can undergo dimension changes and loss of order. This process is not related to any complex microphase separation dynamics but rather a degradation of methacrylate components in the film. The data suggest that care must be taken in interpretation of structural changes in these systems as being due to BCP only effects.
Collections Ireland -> University College Cork -> PubMed

Full list of authors on original publication

Michael A. Morris, Justin D. Holmes, Matthew T Shaw, Ramsankar Senthamaraikannan, Sozaraj Rasappa, Dipu Borah

Experts in our system

1
Michael A. Morris
University College Cork
Total Publications: 164
 
2
Justin D. Holmes
University College Cork
Total Publications: 287
 
3
Matthew T Shaw
University College Cork
Total Publications: 24
 
4
Ramsankar Senthamaraikannan
University College Cork
Total Publications: 12
 
5
Sozaraj Rasappa
University College Cork
Total Publications: 13
 
6
Dipu Borah
University College Cork
Total Publications: 17