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Effect of the Shell crosslinking Level and Core/Shell Ratio on the Morphology of Latex Particles in the Preparation of Hollow Latexes

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Chinese Journal of Polymer Science 2014年第2期32卷 177-186页

作者： Yi-ming Jiang Bo-tian Li Wei-jia Wang Min Xu 阚成友 Department of Chemical Engineering and Key Laboratory of Advanced Materials of Ministry of Education of China Tsinghua University

Three-layer core/shell latex particles with various shell crosslinking level and shell thickness were prepared by multistep emulsion polymerization, and the hollow latex particles with different morphologies were then obtained after alkali post-treatment. Influences of divinyl benzene （DVB） content and the core/shell mass ratio on emulsion polymerization and particle morphology were investigated. Results showed that with the increase of DVB content, the percentage of total amount of --COOH on the particle surface and free in aqueous phase （PSFa） decreased, and the morphology of the post-treated particles underwent evolution from cracked, intact hollow to deficient swelling structure. Decreasing the core/shell mass ratio could not only make more carboxyl groups encapsulated by the shell, but also increase the shell resistance to the swelling of the core. The uniform hollow latex particles with intact morphology were obtained when the DVB content was 3.54 wt% and the core/shell mass ratio was 1/6.

关键词： Emulsion polymerization Hollow morphology crosslinking agent Core/shell mass ratio.

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Preparation of microsized crosslinked microspheres by dispersion copolymerization of polystyrene/polyethylene glycol 200-dimethacrylae

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Journal of University of Science and Technology Beijing 2006年第4期13卷 380-384页

作者： Wenli Guo Juan Wang Tongxiang Liang Institute of Nuclear Energy Technology Tsinghua University Beijing 100084 China

Dispersion copolymerization of styrene with polyethylene glycol 200-dimethacrylae as the cross-linking agent was completed by using poly（N-vinyl pyrrolidone） and 2,2-azo-bisisobutyronitrile as the steric stabilizer and initiator, respectively. Crosslinked copolymeric microspheres were prepared directly by the one-step method of dispersion copolymerization. The effects of the content of polyethylene glycol 200-dimethacrylae on the particle morphology and the copolymerization rate were investigated. It shows that the crosslinking agent plays an important role in the particle morphology and the system stability. When the content of crosslinking reached 2.5wt%, the floriated particles were obtained.

关键词： polystyrene microsphere dispersion polymerization crosslinking agent

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Preparation and Dyeing Performance of a Novel crosslinking Polymeric Dye Containing Flavone Moiety

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Chinese Journal of Chemical Engineering 2011年第4期19卷 661-665页

作者： TANG Lijun TANG Bingtao ZHANG Shufen College of Chemistry and Chemical Engineering Bohai University Jinzhou 121013 China State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116024 China

A yellow crosslinking polymeric dye was prepared by grafting the flavone moiety containing azo chromophore onto polyvinylamine *** λ max of this polymeric dye in water is 382 *** polymeric dye is fixed to silk and cotton with a crosslinking agent,2-chloro-4,6-di(aminobenzene-4'-β-sulphatoethylsulphone)-1,3,5-s-triazine,which acts as a bridge between the fiber and dye *** fixation of this polymeric dye reaches 99% and the dyed samples exhibit excellent rubbing and washing fastness.

关键词： polymeric dye crosslinking dye crosslinking agent flavone

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