The Effect of Nano-SiO2Colloid on Soap-free Emulsion Polymerization of Methyl Methacrylate and Hydroxyethyl Methacrylate

2009 ◽  
Vol 46 (9) ◽  
pp. 870-875 ◽  
Author(s):  
Cai-Li Yu ◽  
Jian-Shu Kang ◽  
Fa-Ai Zhang
Keyword(s):  
Methyl Methacrylate ◽  
Emulsion Polymerization ◽  
Hydroxyethyl Methacrylate ◽  
Soap Free Emulsion Polymerization

scholarly journals Surfactant-free synthesis of layered double hydroxide-armored latex particles

2020 ◽  
Vol 11 (18) ◽  
pp. 3195-3208
Author(s):  
X. G. Qiao ◽  
P.-Y. Dugas ◽  
V. Prevot ◽  
E. Bourgeat-Lami
Keyword(s):  
Methyl Methacrylate ◽  
Emulsion Polymerization ◽  
Layered Double Hydroxide ◽  
Pickering Emulsion ◽  
Hydroxyethyl Methacrylate ◽  
Latex Particles ◽  
Pickering Emulsion Polymerization ◽  
Double Hydroxide

MgAl-layered double hydroxide (LDH)-armored latexes were produced by Pickering emulsion polymerization of styrene using 2-hydroxyethyl methacrylate (HEMA) and methyl methacrylate (MMA) as auxiliary comonomers.

Synthesis and Properties of Nano-TiO2 Modified Fluorine-Containing Polyacrylate Soap-Free Emulsion

2014 ◽  
Vol 809-810 ◽  
pp. 161-168 ◽  
Author(s):  
Jian Hua Zhou ◽  
Lin Ben Wang ◽  
Yan Jiao Cui ◽  
Jian Zhong Ma ◽  
Gen Xing Sun
Keyword(s):  
Methyl Methacrylate ◽  
Emulsion Polymerization ◽  
Cotton Fabric ◽  
Ir Spectrum ◽  
Butyl Acrylate ◽  
Monomer Conversion ◽  
Uv Blocking ◽  
Soap Free Emulsion Polymerization

Nano-TiO2Modified Fluorine-Containing Polyacrylate Soap-Free Emulsion was Successfully Synthesized via Soap-Free Emulsion Polymerization Technique, in which the Polymerization Monomers Consisted of Methyl Methacrylate (MMA), Butyl Acrylate (BA) and Dodecafluoroheptyl Methacrylate (DFMA). the Influence of Amount of Initiator, Emulsifier, Containing Fluorine Monomer and nano-TiO2on the Performance of Emulsion was Investigated. the Results Showed that the Good Polymerization Stability, and High Monomer Conversion were Obtained when the Amount of Ammonium Initiator was 1.2%, the Amount of Reactive Emulsifier was 3.5%. with Increasing Amount of DFMA, the Monomer Conversion Decreased and the Gel Rate Increased Gradually with the Increase of DFMA Amount. UV-Blocking Ability of the Cotton Fabric Treated with the Hybrid Emulsion Containing Nano-Tio2increased with Increasing Amount of Nano-TiO2. IR Spectrum Results Showed that Nano-TiO2and Fluorine-Containing Monomer were Successfully Introduced in the Segmental Structure of the Polymer. SEM Revealed that Nano-TiO2was Loaded on the Surface of the Treated Cotton Fabric which had Good Hydrophobicity.

Exfoliation of montmorillonite by the insertion of disklike micelles via the soap-free emulsion polymerization of methyl methacrylate

2006 ◽  
Vol 44 (19) ◽  
pp. 5572-5579 ◽  
Author(s):  
King-Fu Lin ◽  
Shanq-Chyang Lin ◽  
An-Ting Chien ◽  
Chi-Chun Hsieh ◽  
Ming-Huei Yen ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Emulsion Polymerization ◽  
Soap Free Emulsion Polymerization

Surface sulfate groups on poly(methyl methacrylate) and poly(vinyl acetate) particles from soap-free emulsion polymerization

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Tadanobu Saiga ◽  
Atsushi Suzuki ◽  
Kenji Kikuchi ◽  
Takuji Okaya
Keyword(s):  
Methyl Methacrylate ◽  
Emulsion Polymerization ◽  
Vinyl Acetate ◽  
Particle Diameter ◽  
Monomer Concentration ◽  
Side Reaction ◽  
Sulfate Radical ◽  
Poly Vinyl Alcohol ◽  
Poly Methyl Methacrylate ◽  
Soap Free Emulsion Polymerization

AbstractThe amounts of sulfate groups on the particle surfaces of poly(methyl methacrylate) (PMMA) and poly(vinyl acetate) (PVAc) obtained in soap-free emulsion polymerization were determined. Polymerization was carried out at low monomer concentration using ammonium persulfate as an initiator. After the ionexchange procedure, conductometric titration was carried out. Amounts of surface sulfate groups were lower and particle diameter was larger in the PMMA system compared with PVAc. A large and remarkable difference appeared in the ratio of surface sulfate groups to decomposed sulfate radicals, viz. 90% for the PVAc system and 50% for PMMA. The ratios of sulfate groups per polymer molecule on PMMA and PVAc particles (functionality) were calculated. The functionality of the PMMA system was 70% of the theoretical value, while it was close to 100% in the PVAc system. This large difference might arise from the weak reactivity of the sulfate radical with MMA compared with that of VAc, due to the strong electrophilic nature of the radical. A side reaction of the sulfate radical with MMA is assumed. On the basis of these experimental results, the instability of the emulsion polymerization of acrylic monomers using poly(vinyl alcohol) (PVA) as a protective colloid is discussed in terms of the instability of the soap-free particles formed after the consumption of free PVA in water by the grafting reaction.

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