Diffusion Behavior of the Copolymerized Ultrafine Particles of Styrene and Divinylbenzene in Solution

Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (4): 542.

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Diffusion Behavior of the Copolymerized Ultrafine Particles of Styrene and Divinylbenzene in Solution

YIN Rui, LI Jun-bai, SHEN Jia-cong

Department of Chemistry, Jilin University, Changchun, 130023

Received:1991-01-31 Revised:1991-07-28 Online:1992-04-24 Published:1992-04-24

Abstract

Abstract: The molecular diffusion coefficients of styrene-divinylbenzene ultrafine particles were measured by photon correlation spectroscopy in good (toluene) and θ(cyclohexane) solvents at various temperatures.The hydrodynamic radius and activation energy for diffusion were calculated.The experimental results show that the molecular morphology of St-DVB ultrafine particles changes hardly because of its crosslinking structure.In θsolvent,when T<θ, the particles aggregated and behaved as macromolecular cooperative diffusion; when T>θ, the diffusion coefficient was deviated from the linear relationship between Dand Cin high concentrations.The functions of hydrodynamics and thermodynamics controlled the diffusion behavior of the ultrafine particles.

Key words: Ultrafine particle, Styrene, Divinylbenzene, Photon correlation spectroscopy, Diffusion coefficient

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YIN Rui, LI Jun-bai, SHEN Jia-cong . Diffusion Behavior of the Copolymerized Ultrafine Particles of Styrene and Divinylbenzene in Solution[J]. Chem. J. Chinese Universities, 1992, 13(4): 542.

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Diffusion Behavior of the Copolymerized Ultrafine Particles of Styrene and Divinylbenzene in Solution

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