NDLI: Behavior of adipic dihydrazide and silica in the preparation of acrylate redispersible polymer powders

Content Provider	Springer Nature Link
Author	Xie, Delong Liao, Kai Wang, Lining Zhang, Xinya
Copyright Year	2015
Abstract	The modified acrylate redispersible polymer powders were obtained in a free-flowing form by spray drying the structured latex. The latex with configuration of soft-core and hard-shell was produced by emulsion polymerization, where methyl methacrylate (MMA) and butyl acrylate (BA) were used as comonomers, methacrylic acid (MAA) as functional monomer. The latex was modified by adipic dihydrazide (ADH) to lower the minimum film-forming temperature (MFFT), and it was found that the MFFT of the latex decreased as the content of ADH increased. The obtained latex was transformed into redispersible polymer powders by spray drying, where the silica-sol was used as anticaking agent. Transmission electron microscopy (TEM) was used to detect the distribution of silica sol in the latex before spray drying, and a raspberry morphology was found. Meanwhile, zeta potential showed that the polymer/silica system was rather stable. After spray drying, the morphology of the polymer powders and the distribution of silica were characterized by SEM and EDS. It indicated that the polymer powders had a standard spherical shape with silica-rich surface. The polymer powders could be redispersed in water with the properties similar to the “mother” latex; SEM showed that the redispersion formed a dense and smooth film at 25 °C.
Starting Page	1937
Ending Page	1944
Page Count	8
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	293
Issue Number	7
e-ISSN	14351536
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-04-12
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Redispersible polymer powder Adipic dihydrazide (ADH) Silica sol Morphology Polymer Sciences Soft and Granular Matter, Complex Fluids and Microfluidics Characterization and Evaluation of Materials Physical Chemistry Food Science Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

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