scholarly journals Janus particles by simplified RAFT-based emulsion polymerization process for polymer coating

2022 ◽  
Author(s):  
Duc Nguyen ◽  
Vien T. Huynh ◽  
Algirdas K. Serelis ◽  
Tim Davey ◽  
Olga Paravagna ◽  
...  
Keyword(s):  
Emulsion Polymerization ◽  
Particle Surface ◽  
Batch Process ◽  
Water Soluble ◽  
Polymerization Process ◽  
Janus Particles ◽  
Seed Particle ◽  
Film Forming ◽  
Simplified Method ◽  
One Step

AbstractWe describe a simplified method to synthesize film forming polymer Janus particles by phase separation during RAFT-based free radical emulsion polymerization. Fully crosslinked snowman- or football-shaped polystyrene Janus particles (PSJPs) were first produced in a one-step batch process using amphiphilic triblock macro-RAFT copolymers as stabilizers. Such particles were in turn employed as seeds in a continuous emulsion polymerization in which a monomer mixture of methyl methacrylate (MMA) and butyl acrylate (BA) (1/1 by weight) was constantly injected into the reaction in the presence of a water soluble initiator. The added monomers wetted seed particle surface and their polymerization led to formations of 93-nm film forming single- or two-headed Janus particles. The resulted latex was successfully used to disperse and encapsulate solid calcite extender. Graphical abstract

scholarly journals PMMA Coated BaF2:Er3+Nanoparticles via a Novel One-Step Reverse-Emulsion Polymerization Process

2013 ◽  
Vol 34 (8) ◽  
pp. 2451-2454 ◽  
Author(s):  
Hongzhou Lian ◽  
Lianshe Fu ◽  
Paulo S. Andre ◽  
Jun Lin
Keyword(s):  
Emulsion Polymerization ◽  
Polymerization Process ◽  
One Step

scholarly journals Synthesis Polymer Styrene Butadiene Hybrid Latex with Laponite Organoclay as Filler via Emulsion Polymerization Technique for Application in Paper Coating

2019 ◽  
Author(s):  
Bambang Soegijono ◽  
Johannes Chanra ◽  
Zhongwu Zheng ◽  
Puke Mi
Keyword(s):  
Emulsion Polymerization ◽  
Chemical Properties ◽  
Batch Process ◽  
Polymerization Process ◽  
Coated Paper ◽  
Polymer Hybrid ◽  
Stainless Steel Reactor ◽  
Triphenylphosphonium Bromide ◽  
Styrene Butadiene ◽  
Hybrid Latex

Synthesis of styrene butadiene hybrid latex was performed via emulsion polymerization technique using various amount of laponite clay as filler. Laponite clay was modified with cationic surfactant methyl triphenylphosphonium bromide (MTPB) with ion exchange technique prior to polymerization process. The main objective of the modification is to render the surface of the clay layers to more organophilic. Emulsion polymerization was performed under semi batch process using 2 L laboratory stainless steel reactor with temperature 85°C to 90°C for 8 hours. Polymer hybrid styrene butadiene latex was characterized for its physical and chemical properties with standard ASTM Methods. Characterization of its binding and printing properties were carried out with standard testing method (TAPPI Methods) using single coating formulation on 80 gsm woodfree paper. Polymer hybrid latex based on styrene and butadiene monomers with laponite clay enhanced binding and printing properties of coated paper, addition of laponite clay to 6.0 wt % increased the binding resistance of the coated paper two times higher than pure latex. Reducing binder level become possible for cost saving.

One-step, ultrasonication-mobilized, solvent-free extraction/synthesis of nanocurcumin from turmeric

RSC Advances ◽  
2015 ◽  
Vol 5 (60) ◽  
pp. 48391-48398 ◽  
Author(s):  
Judy Gopal ◽  
Manikandan Muthu ◽  
Se-Chul Chun
Keyword(s):  
Solvent Free ◽  
Water Soluble ◽  
One Step

One step ultrasonication for direct recovery of water soluble nanocurcumin from turmeric.

Conversion Enhancement of Vinyl Acetate Monomer to Polyvinyl Acetate Emulsion through Emulsion Polymerization Method

2021 ◽  
Vol 1028 ◽  
pp. 263-268
Author(s):  
Rafly Aprilian ◽  
Mas Ayu Elita Hafizah ◽  
Azwar Manaf ◽  
Andreas
Keyword(s):  
Emulsion Polymerization ◽  
Vinyl Acetate ◽  
Polyvinyl Acetate ◽  
Batch Process ◽  
Ammonium Persulfate ◽  
Solid Content ◽  
Amphoteric Surfactant ◽  
Polymerization Reaction ◽  
Vinyl Acetate Monomer ◽  
Polymerization Method

Synthesis of Polyvinyl Acetate (PVAc) through the conversion of Vinyl Acetate Monomer (VAM) was carried out by emulsion polymerization method assisted by thermal initiator Ammonium persulfate (APS) under reaction temperature was kept at 70 °C – 80 °C with 5 hours of reaction time and agitation speed at 300 rpm. The polymerization reaction was running used batch process technique where is all components were mixed all together simultaneously. A set of polymerization reactions was conducted when the absence of surfactant and cationic and amphoteric surfactant presence. The monomer chain's double bond was found at 1645 cm-1 was measured by FTIR Spectrophotometer did not disappear after polymerization reaction was utterly done. The spectrum FTIR of Polyvinyl acetate did not explicitly found at 1644 cm-1. During the reaction, characterization was conducted by measuring the solid content value where the maximum solid content was achieved was 6,1 % when using Amphoteric surfactant while the lowest solid content was obtained when the absence of surfactant. Other parameters were conducted to observe the acidity value by pH Meter.

Entry in Emulsion Polymerization:  Effects of Initiator and Particle Surface Charge

2003 ◽  
Vol 36 (11) ◽  
pp. 3921-3931 ◽  
Author(s):  
Kim Y. van Berkel ◽  
Gregory T. Russell ◽  
Robert G. Gilbert
Keyword(s):  
Surface Charge ◽  
Emulsion Polymerization ◽  
Particle Surface
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