Small-angle X-ray scattering study on the conformation of polystyrene in compressed CO2-tetrahydrofuran mixtures

Authors
Li, D Liu, ZM Han, BX Yang, GY Wu, ZH Liu, Y Dong, BZ
Citation
D. Li et al., Small-angle X-ray scattering study on the conformation of polystyrene in compressed CO2-tetrahydrofuran mixtures, MACROMOLEC, 33(21), 2000, pp. 7990-7993
Citations number
32
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
MACROMOLECULES
ISSN journal
00249297 → ACNP
Volume
33
Issue
21
Year of publication
2000
Pages
7990 - 7993
Database
ISI
SICI code
0024-9297(20001017)33:21<7990:SXSSOT>2.0.ZU;2-I
Abstract
Cloud points of the compressed CO2 + tetrahydrofuran (THF) + polystyrene (P S) system was studied at temperature range of 298.15-328.15 K and at differ ent pressures. The expansion of the solution caused by dissolved CO2 was al so studied. Synchrotron radiation small-angle X-ray scattering (SAXS) was u sed to investigate the dissolved CO2 on the conformation of PS. The second virial coefficient A(2) and the apparent mean-square radius of gyration [R- g(2)](1/2) at different pressures were obtained. It was found that the PS c hain shrinks with increasing the concentration of CO2.