Toughening of Epoxy Resin Modified with In Situ Polymerized Acrylate Copolymer

2014 ◽  
Vol 910 ◽  
pp. 70-73
Author(s):  
Tao Wang ◽  
Jun Wang ◽  
Bin Zhang
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
High Performance ◽  
In Situ Polymerization ◽  
Weight Ratio ◽  
Diglycidyl Ether ◽  
Resin System ◽  
Acrylate Copolymer ◽  
Modified Epoxy

P(BA-St), a good modifier for epoxy resin, was prepared by BA and St in situ polymerization. The modified resin system was based on diglycidyl ether of bisphenol and methyl tetrahydrophthalic anhydride, tris (dimethylaminomethyl) phenol. The influence of the copolymer on mechanical properties and thermal performance of the systems was studied. When 15 wt% of the BA/St with a weight ratio composition of 7.5/7.5 was added to epoxy, high performance modified epoxy resin was obtained.

Mechanichal Properties of DGEBA/TEPA Modified Epoxy Resin

2014 ◽  
Vol 775-776 ◽  
pp. 588-592
Author(s):  
Camila Rodrigues Amaral ◽  
Ruben Jesus Sanchez Rodriguez ◽  
Magno Luiz Tavares Bessa ◽  
Verônica Scarpini Cândido ◽  
Sergio Neves Monteiro
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Epoxy Resin ◽  
Yield Stress ◽  
Diglycidyl Ether ◽  
Notch Toughness ◽  
Epoxy Network ◽  
Structural Network ◽  
Flexural Tests ◽  
Modified Epoxy

The correlation between the structural network of a diglycidyl ether of the bisphenol-A (DGEBA) epoxy resin, modified by two distinct aliphatic amines (tetraethylenepentamine TEPA and jeffamine D230), and its mechanical properties, was investigated as possible matrix for abrasive composites applications. Both flexural tests, to determine the yield stress and the elastic modulus, as well as impact tests to determine the notch toughness, were performed. The DGEBA/D230 presented the highest stiffness and toughness but lowest yield stress. This epoxy network also displayed a greater plastic deformation during fracture.

scholarly journals Synthesis of High-performance Composites of Poly(4-vinylpyridine-co-styrene) Copolymer (P4VPy–St) and Polyimides (PI) Having Carboxyl Pendant Groups by in-situ Polymerization and Their Mechanical Properties

2004 ◽  
Vol 36 (10) ◽  
pp. 824-829 ◽  
Author(s):  
Ryo Hamada ◽  
Keiichi Kaneko ◽  
Yuko Takeoka ◽  
Masahiro Rikukawa ◽  
Kohei Sanui
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
In Situ Polymerization ◽  
Styrene Copolymer

scholarly journals Preparation and Properties of Toluene-Diisocyanate-Trimer-Modified Epoxy Resin

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 416 ◽  
Author(s):  
Xiongfei Zhang ◽  
Lu Qiao ◽  
Xiaolian Lu ◽  
Linqi Jiang ◽  
Ting Cao
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Epoxy Resin ◽  
Network Structure ◽  
High Performance ◽  
Toluene Diisocyanate ◽  
Interpenetrating Network ◽  
Resin Curing ◽  
Modified Epoxy ◽  
Polyurethane Prepolymer

In this paper, a novel modified epoxy resin with an interpenetrating network structure for use as a grouting material with high toughness was prepared by a method of graft copolymerization between polyurethane prepolymer (PUP) trimer and epoxy resin (E-44). Polyurethane prepolymer was synthesized using poly(propylene glycol) (PPG) and 2,4-toluene diisocyanate trimer (TDIT) at 70 °C for 3 h. The graft copolymer was prepared by grafting polyurethane prepolymer onto the side chain of epoxy resin at 110 °C. The mechanical properties, fracture surface morphology, chemical structure, thermal properties, and corrosion resistance of the modified epoxy resin curing products were studied. Due to the beneficial flexible segments and the interpenetrating network structure, the results show that when the ratio of epoxy resin to polyurethane prepolymer is 10:2, the optimum mechanical properties are obtained; these include a compressive resistance of 184.8 MPa, impact property of 76.6 kJ/m2, and elongation at break of 31.5%. At the same time, the modified epoxy resin curing product also has excellent heat and corrosion resistance. This work provides a new method for the study of epoxy resins with high performance.

scholarly journals Green Synthesis of Free Standing Cellulose/Graphene Oxide/Polyaniline Aerogel Electrode for High Performance Flexible All-solid-state Supercapacitors

2020 ◽  
Author(s):  
Yueqin Li ◽  
Zongbiao Xia ◽  
Qiang Gong ◽  
Xiaohui Liu ◽  
Yong Yang ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
High Performance ◽  
In Situ Polymerization ◽  
Lithium Bromide ◽  
Three Dimensional ◽  
Weight Ratio ◽  
Porous Structures ◽  
Free Standing ◽  
Symmetric Configuration

The cellulose/GO networks as the scaffold of free-standing aerogel electrodes are developed by using lithium bromide aqueous solution as the solvent to ensure the complete dissolution of cotton linter pulp and well dispersion/reduction of GO nanosheets. PANI nanoclusters are then coated onto cellulose/GO networks via in-situ polymerization of aniline monomers. By optimized weight ratio of GO and PANI, the ternary cellulose/GO3.5/PANI aerogel film exhibits well-defined three-dimensional porous structures and high conductivity of 1.15 S/cm that contributes to its high areal specific capacitance of 1218 mF/cm2 at the current density of 1.0 mA/cm2. Utilizing this cellulose/GO3.5/PANI aerogel film as electrodes in a symmetric configuration supercapacitor can result in an outstanding energy density as high as 258.2 μWh/cm2 at a power density of 1201.4 μW/cm2. Moreover, the device can maintain nearly constant capacitance under different bending deformations, suggesting its promising applications in flexible electronics.

scholarly journals Green Synthesis of Free Standing Cellulose/Graphene Oxide/Polyaniline Aerogel Electrode for High-Performance Flexible All-Solid-State Supercapacitors

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1546
Author(s):  
Yueqin Li ◽  
Zongbiao Xia ◽  
Qiang Gong ◽  
Xiaohui Liu ◽  
Yong Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Flexible Electronics ◽  
High Performance ◽  
In Situ Polymerization ◽  
Lithium Bromide ◽  
Three Dimensional ◽  
Weight Ratio ◽  
Free Standing ◽  
Symmetric Configuration

The cellulose/graphene oxide (GO) networks as the scaffold of free-standing aerogel electrodes are developed by using lithium bromide aqueous solution, as the solvent, to ensure the complete dissolution of cotton linter pulp and well dispersion/reduction of GO nanosheets. Polyaniline (PANI) nanoclusters are then coated onto cellulose/GO networks via in-situ polymerization of aniline monomers. By optimized weight ratio of GO and PANI, the ternary cellulose/GO3.5/PANI aerogel film exhibits well-defined three-dimensional porous structures and high conductivity of 1.15 S/cm, which contributes to its high areal specific capacitance of 1218 mF/cm2 at the current density of 1.0 mA/cm2. Utilizing this cellulose/GO3.5/PANI aerogel film as electrodes in a symmetric configuration supercapacitor can result in an outstanding energy density as high as 258.2 µWh/cm2 at a power density of 1201.4 µW/cm2. Moreover, the device can maintain nearly constant capacitance under different bending deformations, suggesting its promising applications in flexible electronics.

Study on Microstructure and Mechanical Properties of Epoxy Resin/Carbon Black Composites Prepared by in Situ Polymerization

2011 ◽  
Vol 109 ◽  
pp. 156-160 ◽  
Author(s):  
Xue Feng Lu ◽  
Pei Qing La ◽  
Xin Guo ◽  
Yu Peng Wei
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Epoxy Resin ◽  
Bending Strength ◽  
In Situ Polymerization ◽  
Resin Matrix ◽  
Condensation Polymerization ◽  
Maximum Value ◽  
Microstructure And Mechanical Properties

Microstructure and mechanical properties of epoxy resin/carbon black composites synthesized by in situ condensation polymerization of monomers in the presence of carbon black particles were investigated. SEM observation showed that carbon black particles were well dispersed in the epoxy resin matrix. The composite with 1 wt. % carbon black had the electrical resistivity of approximately 108.7 Ω•cm. The composites exhibited an a percolation threshold at carbon black content about 4 wt.%, indicating the existence of a path of percolation by connecting carbon black particles. Bending strength dramatically increased to a maximum value of 133.4MPa and then slowly decreased with content of carbon black increasing. Shore hardness increased gradually with content of carbon black and came to 23.3HD at carbon black 10 wt.%.

The Mechanical Properties of Organic Modified Epoxy Resin

2020 ◽  
Vol 43 (3) ◽  
pp. 10-14
Author(s):  
Georgel MIHU ◽  
Claudia Veronica UNGUREANU ◽  
Vasile BRIA ◽  
Marina BUNEA ◽  
Rodica CHIHAI PEȚU ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Epoxy Resins ◽  
Mechanical Tests ◽  
Organic Modification ◽  
Three Point Bending ◽  
Modified Epoxy

Epoxy resins have been presenting a lot of scientific and technical interests and organic modified epoxy resins have recently receiving a great deal of attention. For obtaining the composite materials with good mechanical proprieties, a large variety of organic modification agents were used. For this study gluten and gelatin had been used as modifying agents thinking that their dispersion inside the polymer could increase the polymer biocompatibility. Equal amounts of the proteins were milled together and the obtained compound was used to form 1 to 5% weight ratios organic agents modified epoxy materials. To highlight the effect of these proteins in epoxy matrix mechanical tests as three-point bending and compression were performed.

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