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  Lamellar ordering in computer-simulated block copolymer melts by a variety of thermal treatments

Banaszak, M., Woloszczuk, S., Jurga, S., & Pakula, T. (2003). Lamellar ordering in computer-simulated block copolymer melts by a variety of thermal treatments. Journal of Chemical Physics, 119(21), 11451-11457.

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 Creators:
Banaszak, M., Author
Woloszczuk, S., Author
Jurga, S., Author
Pakula, Tadeusz1, Author           
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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 Abstract: A lattice computer simulation of a symmetric A-B-A triblock copolymer melt is reported. This melt is quenched, in simulation, from an athermal state to 39 different temperatures using cooperative motion algorithm. Energy, specific heat, copolymer end-to-end distance, bridging fraction, lamellar spacing, concentration profiles, and microstructure visualizations are reported. The quenching simulation results are compared with those obtained by alternative thermal treatments, that is by slow heating and slow cooling. Quenches yield data consistent with theory and experiment, whereas slow cooling and slow heating results do not capture the expected behavior for the lamellar spacing and the bridging fraction. Finally, at very low temperatures, below the conventional order-disorder transition temperature, an additional ordering is recorded, from a conventional lamellar phase to a lamellar structure showing copolymer junction points condensed into a two-dimensional plane. (C) 2003 American Institute of Physics.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 59804
Other: P-03-119
 Degree: -

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Title: Journal of Chemical Physics
  Alternative Title : J. Chem. Phys.
Source Genre: Journal
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Pages: - Volume / Issue: 119 (21) Sequence Number: - Start / End Page: 11451 - 11457 Identifier: -