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Preparation of uniform hollow polystyrene particles with large voids by a glass-membrane emulsification technique and a subsequent suspension polymerization
Alternative TitleJ. Appl. Polym. Sci.
Ma, GH; Chen, AY; Su, ZG; Omi, S
2003-01-10
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
ISSN0021-8995
Volume87Issue:2Pages:244-251
AbstractHollow polymer particles with large voids were prepared with styrene (St) as the main component and in the presence of a small amount of N,N'-dimethylaminoethyl methacrylate (DMAEMA) via a glass-membrane emulsification technique and a subsequent suspension polymerization. A mixture of the monomer, hexadecane (HD), and N,N'-azobis(2,4-dimethylvaleronitrile) as an initiator was used as a dispersed phase (oil phase). By the careful pushing of the dispersed phase through the pores of the glass membrane into the aqueous phase, an emulsion of fairly monodisperse monomer droplets was formed. Then, the polymerization was performed by temperature being elevated to 70degreesC. The aqueous phase (continuous phase) contained poly(N-vinyl pyrrolidone) as a stabilizer, sodium lauryl sulfate as a surfactant, Na2SO4 as an electrolyte, and sodium nitrite (NaNO2) as a water-soluble inhibitor. Results related to the effects of the HD content, DMAEMA, and the composition of the comonomer, including the crosslinker and flexible segment, on the features of the hollow particles were investigated. When the content of DMAEMA was higher than 1.0 wt% based on the total monomer, small, secondary particles were generated in the aqueous phase, but the generation was effectively prevented when DMAEMA was limited to 0.5 wt%. Hollow particles, with an average diameter of around 7 gm, were obtained with an St-DMAEMA system. The void size of the hollow particles was controlled by the HD content. When, the HD content was lower (<25 wt% based on the oil phase), unbroken hollow particles were easily obtained. However, they tended to break into halves after drying when the HD content was increased to 50 wt%. A soft segment, lauryl acrylate, and a crosslinker, ethylene glycol dimethacrylate, were added to overcome this problem. (C) 2002 Wiley Periodicals, Inc.; Hollow polymer particles with large voids were prepared with styrene (St) as the main component and in the presence of a small amount of N,N'-dimethylaminoethyl methacrylate (DMAEMA) via a glass-membrane emulsification technique and a subsequent suspension polymerization. A mixture of the monomer, hexadecane (HD), and N,N'-azobis(2,4-dimethylvaleronitrile) as an initiator was used as a dispersed phase (oil phase). By the careful pushing of the dispersed phase through the pores of the glass membrane into the aqueous phase, an emulsion of fairly monodisperse monomer droplets was formed. Then, the polymerization was performed by temperature being elevated to 70degreesC. The aqueous phase (continuous phase) contained poly(N-vinyl pyrrolidone) as a stabilizer, sodium lauryl sulfate as a surfactant, Na2SO4 as an electrolyte, and sodium nitrite (NaNO2) as a water-soluble inhibitor. Results related to the effects of the HD content, DMAEMA, and the composition of the comonomer, including the crosslinker and flexible segment, on the features of the hollow particles were investigated. When the content of DMAEMA was higher than 1.0 wt% based on the total monomer, small, secondary particles were generated in the aqueous phase, but the generation was effectively prevented when DMAEMA was limited to 0.5 wt%. Hollow particles, with an average diameter of around 7 gm, were obtained with an St-DMAEMA system. The void size of the hollow particles was controlled by the HD content. When, the HD content was lower (<25 wt% based on the oil phase), unbroken hollow particles were easily obtained. However, they tended to break into halves after drying when the HD content was increased to 50 wt%. A soft segment, lauryl acrylate, and a crosslinker, ethylene glycol dimethacrylate, were added to overcome this problem. (C) 2002 Wiley Periodicals, Inc.
KeywordPolystyrene Crosslinking Voids Particle Size Distribution Phase Separation
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/app.11359
URL查看原文
Indexed BySCI
Language英语
WOS KeywordMETHACRYLATE) COMPOSITE MICROSPHERES ; SPG ; MORPHOLOGY
WOS Research AreaPolymer Science
WOS SubjectPolymer Science
WOS IDWOS:000179267600015
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5337
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Chem Engn, Beijing 100080, Peoples R China
2.Tokyo Univ Agr & Technol, Grad Sch Bio Applicat & Syst Engn, Koganei, Tokyo 1848588, Japan
Recommended Citation
GB/T 7714
Ma, GH,Chen, AY,Su, ZG,et al. Preparation of uniform hollow polystyrene particles with large voids by a glass-membrane emulsification technique and a subsequent suspension polymerization[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2003,87(2):244-251.
APA Ma, GH,Chen, AY,Su, ZG,&Omi, S.(2003).Preparation of uniform hollow polystyrene particles with large voids by a glass-membrane emulsification technique and a subsequent suspension polymerization.JOURNAL OF APPLIED POLYMER SCIENCE,87(2),244-251.
MLA Ma, GH,et al."Preparation of uniform hollow polystyrene particles with large voids by a glass-membrane emulsification technique and a subsequent suspension polymerization".JOURNAL OF APPLIED POLYMER SCIENCE 87.2(2003):244-251.
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