| DYNAMIC LIGHT SCATTERING STUDY ON TRANSLATION DIFFUSION OF 8-ARM STAR POLYSTYRENE IN GOOD AND THETA SOLVENTS |
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| 引用本文： | 李峻柏,殷锐,马荣久,沈家骢. DYNAMIC LIGHT SCATTERING STUDY ON TRANSLATION DIFFUSION OF 8-ARM STAR POLYSTYRENE IN GOOD AND THETA SOLVENTS[J]. 高分子科学, 1992, 0(3): 236-241 |
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| 作者姓名： | 李峻柏 殷锐 马荣久 沈家骢 |
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| 作者单位： | Chemistry Department of Jilin University，Changchun 130023，Chemistry Department of Jilin University，Changchun 130023，Chemistry Department of Jilin University，Changchun 130023，Chemistry Department of Jilin University，Changchun 130023 |
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| 摘 要： | The technique of dynamic light scattering has been used to investigate the translation diffusion behavior of 8-arm star polystyrene (SPS)in a good solvent, tetrahydrofuran (THF) or benzene (BZ) and a theta solvent, cyclohexane (CH), by homodyne photon correlation spectroscopy .The intensityintensity autocorrelation function was analyzed by the method of cumulant. The translation diffusion coefficients have been obtained as a function of temperature and concentration. Under theta condition ,the non-concentration dependence of diffusion coefficient showed the unperturbed Gaussian state o the SPS molecular chain. The different hydrodynamic radii estimated from Stokes- Einstein equation reflected the stretch extent of the arm chain for regular star polymer. The data of diffusion activation energy of SPS in THF, BZ and CH were also obtained respectively.
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| 收稿时间： | 1991-06-26 |
DYNAMIC LIGHT SCATTERING STUDY ON TRANSLATION DIFFUSION OF 8-ARM STAR POLYSTYRENE IN GOOD AND THETA SOLVENTS |
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| LI Junbai,YIN Rui,MA Rongjiu,Shen Jiacong. DYNAMIC LIGHT SCATTERING STUDY ON TRANSLATION DIFFUSION OF 8-ARM STAR POLYSTYRENE IN GOOD AND THETA SOLVENTS[J]. Chinese Journal of Polymer Science, 1992, 0(3): 236-241 |
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| Authors: | LI Junbai YIN Rui MA Rongjiu Shen Jiacong |
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| Affiliation: | Chemistry Department of Jilin University; Changchun |
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| Abstract: | The technique of dynamic light scattering has been used to investigate the translation diffusion behavior of 8-arm star polystyrene (SPS)in a good solvent, tetrahydrofuran (THF) or benzene (BZ) and a theta solvent, cyclohexane (CH), by homodyne photon correlation spectroscopy .The intensityintensity autocorrelation function was analyzed by the method of cumulant. The translation diffusion coefficients have been obtained as a function of temperature and concentration. Under theta condition ,the non-concentration dependence of diffusion coefficient showed the unperturbed Gaussian state o the SPS molecular chain. The different hydrodynamic radii estimated from Stokes- Einstein equation reflected the stretch extent of the arm chain for regular star polymer. The data of diffusion activation energy of SPS in THF, BZ and CH were also obtained respectively. |
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| Keywords: | Dynamic light scattering Star polystyrene Molecular diffusion |
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