Preparation of poly(methyl methacrylate) and polystyrene-composite-filled porous epoxy microparticles via in-situ suspension polymerization

2011 ◽  
Vol 30 (8) ◽  
pp. 841-847 ◽  
Author(s):  
Du Ngoc Uy Lan ◽  
Shingo Hadano ◽  
A. Abu Bakar ◽  
B. Azahari ◽  
Z.M. Ariff ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Suspension Polymerization ◽  
Poly Methyl Methacrylate

Mass-suspension polymerization process as an efficient tool to produce polymer/clay nanocomposites

2021 ◽  
Vol 04 ◽  
Author(s):  
Mariaugusta F. Mota ◽  
Thainá Araruna ◽  
Nathália M. Campelo ◽  
Meiry Gláucia F. Rodrigues ◽  
Gabriella R. Ferreira ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Suspension Polymerization ◽  
Experimental Studies ◽  
Ethyl Acrylate ◽  
Polymerization Process ◽  
Basal Spacing ◽  
Polymeric Nanocomposites ◽  
Poly Methyl Methacrylate ◽  
Modified Clays

Background: This work presents the preparation and characterization of the polymeric nanocomposites based on methyl methacrylate (MMA), ethyl acrylate (EA), and natural and modified clays. The clays used to prepare the composite were natural green bentonite (GBC-N) and organophilic clays modified with ammonium quaternary salts: Praepagen (GCBP), Dodigen (GCB-D) and Praepagen/Dodigen mixture 1:1 in weight (GCB-P/D). Objective: The experimental studies focused on the evaluation of the effect of clays (in natura and chemically modified) on the final quality of the polymeric nanocomposites containing around 3 wt%. of clay nanocharges in association with MMA to produce poly(methyl methacrylate)/clays; and MMA/EA to form poly(methyl methacrylate-co-ethyl acrylate)/clays. Materials and Methods: The poly(methyl methacrylate)/clay and poly(methyl methacrylate-co-ethyl acrylate)/clay materials were synthesized through mass-suspension polymerization process. The natural and modified green bentonite clays were characterized by X-ray powder diffraction (XRD), infrared spectroscopy (IR), Differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) analyzes to understand its effect on the basal spacing, d001 (compared to the pure clay), as a result of cation exchange step, in which also improved the thermal efficiency of the final nanocomposites. Results: The proper incorporation of MMA and MMA/AE monomers between the layers of natural and modified clays occurred through in situ mass-suspension polymerization, leading to a successful exfoliation of clay layers during the growth of the polymer chains. Conclusion: The IR, SEM, TGA and DSC analyzes confirmed the improvement in the thermal property of the composites compared to polymers formed in the absence of clays. The experimental results are very promising, indicating that the experimental protocol based on the in situ formation of polymer nanocomposites by the using sequential mass-suspension polymerization consist of an interesting tool.

Rheology and morphology of linear polyurethane and poly(methyl methacrylate) blends formed in situ

2011 ◽  
Vol 53 (10) ◽  
pp. 955-962 ◽  
Author(s):  
V. F. Shumskii ◽  
L. F. Kosyanchuk ◽  
I. P. Getmanchuk ◽  
O. V. Babich ◽  
O. I. Antonenko
Keyword(s):  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate

In-situ generation of Au nanoparticles in poly(methyl methacrylate) films via MeV proton irradiation

2021 ◽  
pp. 125205
Author(s):  
Oleksandr Romanenko ◽  
Petr Slepička ◽  
Ondřej Kvítek ◽  
Miroslav Šlouf ◽  
Pavel Němecek ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Au Nanoparticles ◽  
Proton Irradiation ◽  
Poly Methyl Methacrylate ◽  
In Situ Generation
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