TY - GEN
T1 - Molecular characterization and interdiffusion of ring-shaped polystyrenes and their derivatives
AU - Kawaguchi, Daisuke
AU - Takano, Atsushi
AU - Matsushita, Yushu
PY - 2007/12/1
Y1 - 2007/12/1
N2 - Preparation and characterization of cyclic polystyrenes (c-PS), direct structural observation of one of the derivatives and interdiffusion of c-PS were studied. Cyclic structure of a poly(styrenesulfonate), which was obtained by sulfonation of a c-PS, was directly proved by atomic force microscopic observation. Purities of c-PS were evaluated by high performance liquid chromatography and their values were determined to be higher than 95%. Time evolution of interfacial thicknesses between a cyclic polystyrene (c-hPS) / its deuterated counterpart (c-dPS) and a linear polystyrene (l-hPS) / its deuterated counterpart (l-dPS) bilayer films was investigated by dynamic secondary ion mass spectrometry (DSIMS) and neutron reflectometry (NR). Diffusion coefficient of c-PS is significantly larger than that of the corresponding linear one. This can be explained in terms of weaker topological constraint coming from the less entanglement nature for the c-PS than for the l-PS.
AB - Preparation and characterization of cyclic polystyrenes (c-PS), direct structural observation of one of the derivatives and interdiffusion of c-PS were studied. Cyclic structure of a poly(styrenesulfonate), which was obtained by sulfonation of a c-PS, was directly proved by atomic force microscopic observation. Purities of c-PS were evaluated by high performance liquid chromatography and their values were determined to be higher than 95%. Time evolution of interfacial thicknesses between a cyclic polystyrene (c-hPS) / its deuterated counterpart (c-dPS) and a linear polystyrene (l-hPS) / its deuterated counterpart (l-dPS) bilayer films was investigated by dynamic secondary ion mass spectrometry (DSIMS) and neutron reflectometry (NR). Diffusion coefficient of c-PS is significantly larger than that of the corresponding linear one. This can be explained in terms of weaker topological constraint coming from the less entanglement nature for the c-PS than for the l-PS.
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M3 - Conference contribution
AN - SCOPUS:84856614910
SN - 0978047907
SN - 9780978047900
T3 - AES-ATEMA International Conference Series - Advances and Trends in Engineering Materials and their Applications
SP - 263
EP - 269
BT - Advances and Trends in Engineering Materials and their Applications - Proceedings of AES-ATEMA 1st International Conference
T2 - 1st International Conference on Advances and Trends in Engineering Materials and their Applications, AES-ATEMA'2007
Y2 - 6 August 2007 through 10 August 2007
ER -