Preparation and mechanical and electrical properties of graphene nanosheets-poly(methyl methacrylate) nanocomposites via in situ suspension polymerization

2011 ◽  
Vol 122 (3) ◽  
pp. 1866-1871 ◽  
Author(s):  
Jingchao Wang ◽  
Huating Hu ◽  
Xianbao Wang ◽  
Chunhui Xu ◽  
Min Zhang ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Methyl Methacrylate ◽  
Graphene Nanosheets ◽  
Suspension Polymerization ◽  
Poly Methyl Methacrylate ◽  
Mechanical And Electrical Properties

Improvement of electrical, thermal, and mechanical properties of poly(methyl methacrylate)/poly(ethylene oxide) blend using graphene nanosheets

2018 ◽  
Vol 32 (9) ◽  
pp. 1176-1189 ◽  
Author(s):  
Elham Aram ◽  
Morteza Ehsani ◽  
Hossein Ali Khonakdar ◽  
Serveh Abdollahi
Keyword(s):  
Mechanical Properties ◽  
Electrical Properties ◽  
Ethylene Oxide ◽  
Methyl Methacrylate ◽  
Graphene Nanosheets ◽  
X Ray Diffraction ◽  
Poly Methyl Methacrylate ◽  
Mechanical And Electrical Properties ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Poly(methyl methacrylate) (PMMA)/poly(ethylene oxide) (PEO) (90/10) nanocomposites containing various amounts of graphene nanoplatelets were fabricated by solution method and then the effects of graphene concentration on morphology, thermal, mechanical, and electrical properties of the nanocomposites were investigated. Characterization by electron microscopy and X-ray diffraction of the nanocomposites showed a relatively good dispersion of graphene sheets in the polymer matrix. The results indicated that thermal stability, glass transition temperature, and mechanical properties of PMME/PEO blend improved by increasing graphene concentration. The electrical properties of polymer nanocomposites revealed a significant improvement with increasing the amount of graphene and the percolation threshold was about 3.33 wt% of graphene.

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.

In Situ Thermal Reduction of Graphene Nanosheets Based Poly(methyl methacrylate) Nanocomposites with Effective Reinforcements

2015 ◽  
Vol 54 (2) ◽  
pp. 649-658 ◽  
Author(s):  
Xinxin Sheng ◽  
Delong Xie ◽  
Wenxi Cai ◽  
Xinya Zhang ◽  
Li Zhong ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Graphene Nanosheets ◽  
Thermal Reduction ◽  
Poly Methyl Methacrylate

scholarly journals Influence of Graphene Oxide on the Tribological and Electrical Properties of PMMA Composites

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Jiale Song ◽  
Jiaoxia Zhang ◽  
Chunling Lin
Keyword(s):  
Graphene Oxide ◽  
Electrical Properties ◽  
Methyl Methacrylate ◽  
In Situ Polymerization ◽  
Raw Materials ◽  
Frictional Coefficient ◽  
Natural Graphite ◽  
Poly Methyl Methacrylate ◽  
Hummers Method

The graphene oxide (GO) was obtained by Hummers' method using natural graphite as raw materials. Then, the GO/poly(methyl methacrylate) (PMMA) nanocomposites were prepared by in situ polymerization. The tribological and electrical properties of nanocomposites were studied. As a result, the frictional coefficient of GO/PMMA nanocomposites was prominently improved with the content of the graphene oxide increasing. The electrical properties of nanocomposites were slightly increased when adding the graphene oxide.

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
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