TY - JOUR
T1 - Neutron Reflection Studies on Lamellar Microphase-Separated Structures of Two-Component Block Copolymers with Composition Distribution
AU - Torikai, Naoya
AU - Noro, Atsushi
AU - Okuda, Masatoshi
AU - Odamaki, Fumitake
AU - Kawaguchi, Daisuke
AU - Takano, Atsushi
AU - Matsushita, Yushu
N1 - Funding Information:
We thank Dr. R. Dalgliesh at Rutherford Appleton Laboratory and Dr. M. Harada at Toyota Central R&D Laboratories, Inc., for their kind assistance. The part of NR experiments were performed under the Japan–UK Collaboration Program on Neutron Scattering supported by a Grant-in-Aid for Creative Scientific Research (No.16GS0417) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.
PY - 2006/11/27
Y1 - 2006/11/27
N2 - Segmental distribution of polystyrene blocks in lamellar microphase-separated poly(styrene-block-2-vinylpyridine) (SP) with wide composition distribution was investigated by neutron reflectivity measurements using deuterium-labeled polymers. Block copolymers with wide composition distribution were produced by mixing three monodispersed parent block copolymers, which were synthesized by an anionic polymerization method to have the same total molecular weight but with different volume fractions. The block copolymer blends whose overall S/P ratio is 0.5/0.5 were found to form a uniform lamellar structure, where lamellae were highly oriented along the direction parallel to the film surface and the interfacial thickness was evaluated as 40 Å. It was clarified that a shorter block chain in the microdomain is localized at the domain boundary, while a longer one has a peak at the center of microdomain in its segmental distribution profile.
AB - Segmental distribution of polystyrene blocks in lamellar microphase-separated poly(styrene-block-2-vinylpyridine) (SP) with wide composition distribution was investigated by neutron reflectivity measurements using deuterium-labeled polymers. Block copolymers with wide composition distribution were produced by mixing three monodispersed parent block copolymers, which were synthesized by an anionic polymerization method to have the same total molecular weight but with different volume fractions. The block copolymer blends whose overall S/P ratio is 0.5/0.5 were found to form a uniform lamellar structure, where lamellae were highly oriented along the direction parallel to the film surface and the interfacial thickness was evaluated as 40 Å. It was clarified that a shorter block chain in the microdomain is localized at the domain boundary, while a longer one has a peak at the center of microdomain in its segmental distribution profile.
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U2 - 10.1016/j.physb.2006.05.303
DO - 10.1016/j.physb.2006.05.303
M3 - Article
AN - SCOPUS:33751313348
SN - 0921-4526
VL - 385-386 I
SP - 709
EP - 712
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
ER -