Preparation of polystyrene/poly(vinyl acetate) nanocomposites with a core–shell structure via emulsifier-free emulsion polymerization

2006 ◽  
Vol 100 (3) ◽  
pp. 2409-2414 ◽  
Author(s):  
Morteza Soltan-Dehghan ◽  
Naser Sharifi-Sanjani ◽  
Nader Naderi
Keyword(s):  
Emulsion Polymerization ◽  
Vinyl Acetate ◽  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure

Preparation and adsorption behaviour of cationic nanoparticles for sugarcane fibre modification

RSC Advances ◽  
2016 ◽  
Vol 6 (40) ◽  
pp. 33554-33560 ◽  
Author(s):  
Yuanfeng Pan ◽  
Zhengdong Zhang ◽  
Yang Li ◽  
Pingxiong Cai ◽  
Zhangfa Tong ◽  
...  
Keyword(s):  
Zeta Potential ◽  
Emulsion Polymerization ◽  
Ammonium Chloride ◽  
Shell Structure ◽  
Core Shell ◽  
Trimethyl Ammonium Chloride ◽  
Adsorption Behaviour ◽  
Cationic Nanoparticles ◽  
Core Shell Structure ◽  
Fibre Modification

Cationic nanoparticles with a core–shell structure and high zeta potential were prepared by two-step semi-batch emulsion polymerization and pre-emulsification technology using the cationic emulsifier hexadecyl trimethyl ammonium chloride (CTAC).

Strippable Core-Shell Polymer Emulsion for Decontamination of Radioactive Surface Contamination

2010 ◽  
Author(s):  
Ho-Sang Hwang ◽  
Bum-Kyoung Seo ◽  
Kune-Woo Lee
Keyword(s):  
Emulsion Polymerization ◽  
Shell Structure ◽  
Sodium Dodecyl ◽  
Ethyl Acrylate ◽  
Surface Contamination ◽  
Core Shell ◽  
Composite Polymer ◽  
Polymer Emulsion ◽  
The Core ◽  
Core Shell Structure

In this study, the core-shell composite polymer for decontamination from the surface contamination was synthesized by the method of emulsion polymerization and blends of polymers. The strippable polymer emulsion is composed of the poly(styrene-ethyl acrylate) [poly(St-EA)] composite polymer, poly(vinyl alcohol) (PVA) and polyvinylpyrrolidone (PVP). The morphology of the poly(St-EA) composite emulsion particle was core-shell structure, with polystyrene (PS) as the core and poly(ethyl acrylate) (PEA) as the shell. Core-shell polymers of styrene (St)/ethyl acrylate (EA) pair were prepared by sequential emulsion polymerization in the presence of sodium dodecyl sulfate (SDS) as an emulsifier using ammonium persulfate (APS) as an initiator. Related tests and analysis confirmed the success in synthesis of composite polymer. The products are characterized by FT-IR spectroscopy, TGA that were used, respectively, to show the structure, the thermal stability of the prepared polymer. Two-phase particles with a core-shell structure were obtained in experiments where the estimated glass transition temperature and the morphologies of emulsion particles. Decontamination factors of the strippable polymeric emulsion were evaluated with the polymer blend contents.

Synthesis of Poly(Vinyl Alcohol) and/or Poly(Vinyl Acetate) Particles with Spherical Morphology and Core-Shell Structure and its Use in Vascular Embolization

2006 ◽  
Vol 243 (1) ◽  
pp. 190-199 ◽  
Author(s):  
Luciana S. Peixoto ◽  
Fabricio M. Silva ◽  
Mariana A. L. Niemeyer ◽  
Gaudencio Espinosa ◽  
Príamo A. Melo ◽  
...  
Keyword(s):  
Vinyl Acetate ◽  
Shell Structure ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Core Shell ◽  
Spherical Morphology ◽  
Core Shell Structure

scholarly journals Silica/polymer core–shell particles prepared via soap-free emulsion polymerization

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 254-261
Author(s):  
Mina Ishihara ◽  
Tomofumi Kaeda ◽  
Takashi Sasaki
Keyword(s):  
Emulsion Polymerization ◽  
Radical Polymerization ◽  
Shell Structure ◽  
Cross Linking ◽  
Core Shell ◽  
Shell Formation ◽  
The Core ◽  
Core Shell Structure ◽  
Soap Free Emulsion Polymerization ◽  
Shell Particles

AbstractIn this study, core–shell particles were prepared as a hybrid material, in which a thin polymer shell was formed on the surface of the SiO2 sphere particles. The core–shell structure was successfully achieved without adding a surfactant via simple free-radical polymerization (soap-free emulsion polymerization) for various monomers of styrene, methyl methacrylate (MMA), and their derivatives. MMA formed thin homogeneous shells of polymer (PMMA) less than 100 nm in thickness with complete surface coverage and a very smooth shell surface. The obtained shell morphology strongly depended on the monomers, which suggests different shell formation mechanisms with respect to the monomers. It was found that the cross-linking monomer 1,4-divinylbenzene tends to promote shell formation, and the cross-linking reaction may stabilize the core–shell structure throughout radical polymerization. It should also be noted that the present method produced a considerable amount of pure polymer besides the core–shell particles. The glass transition temperatures of the obtained polymer shells were higher than those of the corresponding bulk materials. This result suggests strong interactions at the core–shell interface.

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