Ordering and microdomain orientation in block copolymer films by thermal deprotection

Ordering and microdomain orientation for the films of symmetric polystyrene- b-poly( tert-butyl methacrylate)s (PS- b-P tBMAs) was investigated by in-situ grazing incidence small-angle X-ray scattering (GISAXS) and the electron microscopy. During thermal deprotection at higher temperature (200 °C),...

Full description

Saved in:
Bibliographic Details
Published in:Polymer (Guilford) 2011-05, Vol.52 (12), p.2677-2684
Main Authors: Kim, Eunhye, Ahn, Hyungju, Lee, Hoyeon, Lee, Byeongdu, Ryu, Du Yeol
Format: Article
Language:English
Subjects:
Anhydrides
Applied sciences
Block copolymer films
Block copolymers
Blocking
Esters
Exact sciences and technology
Interaction parameters
Microdomain orientation
Order disorder
Ordering
Organic polymers
Orientation
Physicochemistry of polymers
Properties and characterization
Stretching
Structure, morphology and analysis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ordering and microdomain orientation for the films of symmetric polystyrene- b-poly( tert-butyl methacrylate)s (PS- b-P tBMAs) was investigated by in-situ grazing incidence small-angle X-ray scattering (GISAXS) and the electron microscopy. During thermal deprotection at higher temperature (200 °C), functional tert-butyl ester units in the P tBMA block component are integrated into inter- or intra-molecular anhydride linkages. It was observed that this process causes an increase in the Flory–Huggins interaction parameter ( χ) between the two block components for disordered PS- b-P tBMA film, leading to a modulated nonequilibrium structure. Interestingly, for lamella-forming PS- b-P tBMA film, a significant chain stretching in lateral direction during thermal deprotection resulted in a characteristic strain-induced perpendicular orientation in the middle of the film confined between two parallel orientations of lamellar microdomains. [Display omitted]
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2011.04.031