期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 31, 期 6, 页码 554-557出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200900719
关键词
crown ether; host guest systems; infrared spectroscopy; polystyrene; syndiotactic
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.
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