Synthesis and Characterization of Emulsifier-free Self-cross Linked Polystyrene Latex in the Presence of β-Hydroxy Propyl Acrylate

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (9): 1312.

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Synthesis and Characterization of Emulsifier-free Self-cross Linked Polystyrene Latex in the Presence of β-Hydroxy Propyl Acrylate

DAI Li-Zong, ZOU You-Si, SONG Ai-Qun, PAN Rong-Hua

Department of Chemistry, Xiamen University, Xiamen, 361005

Received:1992-11-03 Revised:1993-02-17 Online:1993-09-24 Published:1993-09-24

Abstract

Abstract: Emulsifier-free emulsion polymerization of styrene in the presence of β-hydroxy propyl acrylate was studied.Monomer conversion is higher than 90% when [St], [β-HPA], [KPS] is 2.66, 0.228, and 5.8×10^-3 mol/Lrespectively under 80℃ for 5 h.The mono-dispersed latex particle diameter and colloidal particle concentration were given as D=0.23 μm, N=3.13× 10¹³/cm³ by TEManalyse.The factors of influencing latex stability were discussed.The copoly-mer was characterized by IRand dissolution experiment.The self-cross linked mechanism was also discussed.The apparent activation energy of polymerization and polymerization rate constant were obtained to be 78.7 kJ/mol and 514.3 L/mol · s respectively.

Key words: Emulsifier-free emulsion polymerization, β-Hydroxy propyl acrylate, Styrene, Self- cross linked latex, Kinetics

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DAI Li-Zong, ZOU You-Si, SONG Ai-Qun, PAN Rong-Hua . Synthesis and Characterization of Emulsifier-free Self-cross Linked Polystyrene Latex in the Presence of β-Hydroxy Propyl Acrylate[J]. Chem. J. Chinese Universities, 1993, 14(9): 1312.

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Synthesis and Characterization of Emulsifier-free Self-cross Linked Polystyrene Latex in the Presence of β-Hydroxy Propyl Acrylate

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