Influence of Strongly Interacting Hompolymers on the Long-Range Order in Semi-Crystalline Block Copolymer Templates
Vijay Tirumala, B D. Vogt, Eric K. Lin, J J. Watkins
Long-range order and the strength of domain segregation in semicrystalline block copolymers are often hindered by the rapid crystallization within the blocks. We found that the copolymer template ordering in such a case can be improved by blending with an amorphous homopolymer that strongly selectively interacts with the crystallizing segments. Neutron scattering studies show that template order in a weakly segregated semicrystalline poly (ethylene oxide-propylene oxide-ethylene oxide) (PEO-PPO-PEO) is significantly improved when blended with poly (acrylic acid) (PAA). Strongly selective hydrogen bonding interactions between PAA and the ether oxygen in PEO coupled with repulsive interactions between PAA and PPO improve the segregation strength, resulting in long-range order.
Journal of the American Chemical Society
block copolymers, homopolymers, long-range order, pluronics, thin films
, Vogt, B.
, Lin, E.
and Watkins, J.
Influence of Strongly Interacting Hompolymers on the Long-Range Order in Semi-Crystalline Block Copolymer Templates, Journal of the American Chemical Society
(Accessed December 5, 2023)