[논문]Structure and property characterization of nanograde core-shell polyurethane/polyacrylate composite emulsion

Chai, Shu Ling; Tan, Hui Min

doi:10.1002/app.27517

Structure and property characterization of nanograde core-shell polyurethane/polyacrylate composite emulsion

Journal of applied polymer science, v.107 no.6, 2008년, pp.3499 - 3504

Chai, Shu Ling (School of Light Chemistry and Environmental Engineering, Shandong Institute of Light Industry, Jinan 250353, China) , Tan, Hui Min (School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, China)

Abstract ▼ AI-Helper

Anionic aqueous polyurethane dispersion was synthesized through self-emulsifing method from cycloaliphatic isophorone diisocyanate (IPDI) and dimethylolpropionic acid (DMPA). The carboxyl acid group in DMPA was used to make the polyurethane dispersible. The polyurethane/polyacrylate (PU/PA) composite particles were also prepared by seeded surfactant-free emulsion polymerization; the cycloaliphatic polyurethane aqueous dispersion was used as seed particles. The structures and properties of the composite emulsion as well as the physical mixture of polyurethane dispersion and polyacrylate emulsion were characterized by FTIR, DSC, dynamic light scattering, TEM, X-ray photoelectron spectroscopy (ESCA), and electronic tensile machine. The results showed that the synthesized PU/PA composite emulsion was found to form inverted core-shell structure with polyacrylate as the core and with polyurethane as the shell, and its diameter of particles is in the range of nanograde, the crosslinking reaction was existed in composite emulsion. The intimate molecular mixing of crosslinking polymers are also claims to result in a superior balance of properties compared to physical blends of polyurethane dispersion and acrylate emulsion. The crosslinking mechanism of PU/PA composite emulsion was also discussed. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

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Structure and property characterization of nanograde core-shell polyurethane/polyacrylate composite emulsion

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