title: Complexation of syndiotactic polystyrene with 12-crown-4.
abstract: Solid-state complexation of syndiotactic polystyrene (sPS) with a crown ether compound, 1,4,7,10-tetraoxa-cyclododecane (12-crown-4), took place when a film of sPS/chloroform clathrate was subjected to a guest exchange procedure assisted with a plasticizing agent. The new guest 12-crown-4 molecules were incorporated into the crystalline region of the sPS film, without causing a large conformational change of host sPS helices. X-ray diffraction and thermogravimetric investigations showed that sPS/12-crown-4 complex had a clathrate complex structure which contained four 12-crown-4 molecules per unit cell. IR and Raman data suggested that 12-crown-4 took a C(i) -type conformation in the sPS complex phase.
authors: Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan. toshi@chem.sci.osaka-u.ac.jp.
authors: Fumitoshi
authors: F
authors: Kaneko
authors: Natsuko
authors: N
authors: Kashihara
authors: Tsuyoshi
authors: T
authors: Tsuchida
authors: Kenji
authors: K
authors: Okuyama