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Preparation of hemispherical poly(4-vinylpyridine-co-butyl acrylate)/poly(styrene-co-butyl acrylate) composite microspheres by seeded preswelling emulsion polymerization
Alternative TitleJ. Appl. Polym. Sci.
Han, SH; Ma, GH; Du, YZ; Omi, S; Gu, LX
2003-12-27
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
ISSN0021-8995
Volume90Issue:14Pages:3811-3821
AbstractSeeded preswelling emulsion polymerization was carried out by using monodispersed poly(4-vinylpyridine-co-butyl acrylate) [P(4VP-BA)] particles as the seed, and styrene and butyl acrylate as the second-stage monomers under different polymerization conditions, to obtain hemispherical polystyrene (PST)-rich-P4VP-rich microspheres. Prior to polymerization, toluene was added into the preswelling system together with the second-stage monomers. It was found that, with the increase of the amount of toluene, the particle morphology showed a tendency toward desirable hemispherical structure, and the colloidal stability of composite latex was improved. When the weight ratio of toluene/seed latex was increased up to 7.5/40 (g/g), the stable hemispherical latex could be obtained. However, when toluene was not added, the coagulum formed on the wall of the reactor during polymerization, and the composite particles with multiple surface domains (such as sandwich-like, popcorn-like) were formed. In addition, the final morphology of composite particles was influenced by the polarity of the seed crosslinker and the hydrophilicity of the second-stage initiator, which could affect the mobility of poly(styrene-co-butyl acrylate) [P(ST-BA)] chains. The morphology development during the polymerization was investigated in detail, and a schematic model was derived to depict the formation mechanism of hemispherical P(4VPBA)/P(ST-BA) composite microspheres. The results revealed that the mobility of the P(ST-BA) chains influenced the diffusion of the P(ST-BA) domains on the surface of the P(4VP-BA) matrix. When the mobility of the P(ST-BA) chains allowed small-size P(ST-BA) domains to coalesce into one larger domain, complete phase-separated morphology (hemisphere) could be achieved. (C) 2003 Wiley Periodicals, Inc.; Seeded preswelling emulsion polymerization was carried out by using monodispersed poly(4-vinylpyridine-co-butyl acrylate) [P(4VP-BA)] particles as the seed, and styrene and butyl acrylate as the second-stage monomers under different polymerization conditions, to obtain hemispherical polystyrene (PST)-rich-P4VP-rich microspheres. Prior to polymerization, toluene was added into the preswelling system together with the second-stage monomers. It was found that, with the increase of the amount of toluene, the particle morphology showed a tendency toward desirable hemispherical structure, and the colloidal stability of composite latex was improved. When the weight ratio of toluene/seed latex was increased up to 7.5/40 (g/g), the stable hemispherical latex could be obtained. However, when toluene was not added, the coagulum formed on the wall of the reactor during polymerization, and the composite particles with multiple surface domains (such as sandwich-like, popcorn-like) were formed. In addition, the final morphology of composite particles was influenced by the polarity of the seed crosslinker and the hydrophilicity of the second-stage initiator, which could affect the mobility of poly(styrene-co-butyl acrylate) [P(ST-BA)] chains. The morphology development during the polymerization was investigated in detail, and a schematic model was derived to depict the formation mechanism of hemispherical P(4VPBA)/P(ST-BA) composite microspheres. The results revealed that the mobility of the P(ST-BA) chains influenced the diffusion of the P(ST-BA) domains on the surface of the P(4VP-BA) matrix. When the mobility of the P(ST-BA) chains allowed small-size P(ST-BA) domains to coalesce into one larger domain, complete phase-separated morphology (hemisphere) could be achieved. (C) 2003 Wiley Periodicals, Inc.
KeywordEmulsion Polymerization Colloid Composites Morphology Swelling
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/app.13094
URL查看原文
Indexed BySCI
Language英语
WOS KeywordMEMBRANE EMULSIFICATION TECHNIQUE ; PARTICLE MORPHOLOGY ; DISPERSION POLYMERIZATION ; INTERFACIAL PHENOMENA ; LATEX-PARTICLES ; MICROGEL ; NETWORKS
WOS Research AreaPolymer Science
WOS SubjectPolymer Science
WOS IDWOS:000186374700008
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5334
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100080, Peoples R China
2.Donghua Univ, Coll Mat Sci & Engn, Shanghai 200051, Peoples R China
3.Inst Biol Resources & Funct, Natl Inst AIST, Tsukuba, Ibaraki 3058566, Japan
4.Tokyo Univ Agr & Technol, Grad Sch Bioappl & Syst Engn, Tokyo 1848588, Japan
Recommended Citation
GB/T 7714
Han, SH,Ma, GH,Du, YZ,et al. Preparation of hemispherical poly(4-vinylpyridine-co-butyl acrylate)/poly(styrene-co-butyl acrylate) composite microspheres by seeded preswelling emulsion polymerization[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2003,90(14):3811-3821.
APA Han, SH,Ma, GH,Du, YZ,Omi, S,&Gu, LX.(2003).Preparation of hemispherical poly(4-vinylpyridine-co-butyl acrylate)/poly(styrene-co-butyl acrylate) composite microspheres by seeded preswelling emulsion polymerization.JOURNAL OF APPLIED POLYMER SCIENCE,90(14),3811-3821.
MLA Han, SH,et al."Preparation of hemispherical poly(4-vinylpyridine-co-butyl acrylate)/poly(styrene-co-butyl acrylate) composite microspheres by seeded preswelling emulsion polymerization".JOURNAL OF APPLIED POLYMER SCIENCE 90.14(2003):3811-3821.
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