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Effect of gas antisolvent on conformation of polystyrene in toluene: Viscosity and small-angle X-ray scattering study
Li, D; Han, BX; Liu, ZM; Liu, J; Zhang, XG; Wang, SG; Zhang, XF; Wang, J; Dong, BZ; Wang J(王俊); Dong BZ(董宝中)
2001
发表期刊MACROMOLECULES
卷号34期号:7页码:2195-2201
通讯作者Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China ; Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China
摘要Synchrotron radiation small-angle X-ray scattering (SAXS) and the viscosity technique were used to investigate the effect of dissolved CO(2) in toluene on the conformation of polystyrene (PS) in the solution. The viscosity of PS solution decreases faster with increasing antisolvent CO(2) pressure than that of the solvent in the absence of the polymer. The intrinsic viscosity [eta] calculated using the well-known Huggins equation decreases with antisolvent pressure. It was found that the second virial coefficient Az and the apparent mean-square radius of gyration (R(g)(2))(1/2) decreases with pressure of antisolvent CO(2). All these phenomena can be attributed to the shrink of PS chain in the course of adding the gas antisolvent because the interaction between the polymer and solvent becomes weaker. The values (R(g)(2))(1/2) at different pressures obtained from SAXS data agree reasonably with those calculated from Flory theory using the viscosity data determined in this work. This implies that Flory theory, which has been used widely for the solutions of polymers in liquid solvents, is also applicable to the polymer solution with gas antisolvent.
文章类型Article
学科领域Polymer Science
研究领域[WOS]Polymer Science
DOI10.1021/ma0014463
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语种英语
WOS类目Polymer Science
WOS记录号WOS:000167615600023
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被引频次:27[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/239681
专题多学科研究中心
作者单位中国科学院高能物理研究所
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GB/T 7714
Li, D,Han, BX,Liu, ZM,et al. Effect of gas antisolvent on conformation of polystyrene in toluene: Viscosity and small-angle X-ray scattering study[J]. MACROMOLECULES,2001,34(7):2195-2201.
APA Li, D.,Han, BX.,Liu, ZM.,Liu, J.,Zhang, XG.,...&董宝中.(2001).Effect of gas antisolvent on conformation of polystyrene in toluene: Viscosity and small-angle X-ray scattering study.MACROMOLECULES,34(7),2195-2201.
MLA Li, D,et al."Effect of gas antisolvent on conformation of polystyrene in toluene: Viscosity and small-angle X-ray scattering study".MACROMOLECULES 34.7(2001):2195-2201.
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