著者
小林 秀雄 浦川 理 金子 文俊 井上 正志
出版者
The Society of Rheology, Japan
雑誌
日本レオロジー学会誌 (ISSN:03871533)
巻号頁・発行日
vol.42, no.1, pp.19-23, 2014
被引用文献数
4

The δ-cocrystal of syndiotactic polystyrene (sPS) can capsulate various small guest molecules in the cavity of the crystalline region. We examined the rotational motion of isolated polar guest molecule, benzonitrile (BN), caged in the crystalline cavities by dielectric spectroscopy and the results were compared with the previously reported data of sPS / methyl ethyl ketone (MEK) system. The relaxation of BN in the crystalline region was specified from the comparison with the dielectric data of atactic-PS / BN system in which only the amorphous phase exists. The rotational relaxation time of BN in the crystalline cavity was 6 orders of magnitude longer, and the activation energy of BN was twice larger than those of MEK. These results suggest that spatial restriction due to the small cavity size strongly retards the rotational dynamics of the larger guest molecule, BN. Two-site model could successfully describe the temperature dependence of the dielectric intensity for sPS / BN system, revealing that there exist two stable states of BN molecules with energy difference of 7.42 kJmol<sup><font size="-1">-1</font></sup> in the crystalline cavity.

1 0 0 0 人間の建設

著者
小林秀雄 岡潔著
出版者
新潮社
巻号頁・発行日
2010

1 0 0 0 近代絵画

著者
小林秀雄著
出版者
新潮社
巻号頁・発行日
1968
著者
小林 秀雄
出版者
新潮社
雑誌
芸術新潮 (ISSN:04351657)
巻号頁・発行日
vol.13, no.4, pp.34-36, 1962-04