ICCAS OpenIR
Crosslinkable microsized multi-hollow waterborne spheres of epoxy resin prepared by phase inversion emulsification
Qiu, D; Li, J; Yang, ZZ
2002-10-01
Source PublicationACTA POLYMERICA SINICA
ISSN1000-3304
Issue5Pages:699-702
AbstractThis work provides a new method to prepare crosslinkable multi-hollow micro-spheres of epoxy resin dispersible in water by incomplete phase inversion emulsification in the presence of a catalytic curing agent. The key is to add the curing agent in the vicinity of the phase inversion point at low temperature so as to control the emulsifier capability of the pre-curing oligomers at a low level, which ensures the achievement of incomplete phase inversion emulsification. Scanning electron micrographs of the spheres reveal that the particles size is mainly in the range of 1 similar to 10 mum with sub-micron cavities within the spheres. DSC is used to measure the curing behavior of the spheres. Two broad exothermic peaks around 120 and 162degreesC are found in the as-prepared particles, while the first peak shifts to higher temperature 135degreesC and the onset temperature exceeds 100degreesC in the thermally treated sample at 95degreesC for 1.5 h. This indicates that the initial step curing process under the post-treatment conditions is nearly completed. After further treated at high temperature for example 200degreesC, a glass transition temperature about 130degreesC is found, and the two peaks disappear due to a full achievement of the curing process. Extraction results show that after treated at 95 T for 1.5 h in water, the micro-sized spheres become insoluble. It is concluded that the entitled waterborne microspheres are crosslinkable and multiporous. A preliminary result demonstrates a potential application of the entitled multi-hollow spheres as opacifiers due to their intensive light scattering within the hollows.
KeywordCrosslinkable Epoxy Resin Hollow Spheres Phase Inversion Emulsification Waterborne Dispersions
Indexed BySCI
Language英语
WOS IDWOS:000178936800031
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79414
Collection中国科学院化学研究所
Corresponding AuthorQiu, D
AffiliationChinese Acad Sci, State Key Lab Polymer Phys & Chem, Ctr Mol Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Qiu, D,Li, J,Yang, ZZ. Crosslinkable microsized multi-hollow waterborne spheres of epoxy resin prepared by phase inversion emulsification[J]. ACTA POLYMERICA SINICA,2002(5):699-702.
APA Qiu, D,Li, J,&Yang, ZZ.(2002).Crosslinkable microsized multi-hollow waterborne spheres of epoxy resin prepared by phase inversion emulsification.ACTA POLYMERICA SINICA(5),699-702.
MLA Qiu, D,et al."Crosslinkable microsized multi-hollow waterborne spheres of epoxy resin prepared by phase inversion emulsification".ACTA POLYMERICA SINICA .5(2002):699-702.
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