scholarly journals Influence of partial cross-linking degree on basic physical properties of RTM6 epoxy resin

2013 ◽  
pp. n/a-n/a ◽  
Author(s):  
Judith Moosburger-Will ◽  
Michael Greisel ◽  
Markus G. R. Sause ◽  
Robert Horny ◽  
Siegfried Horn
Keyword(s):  
Physical Properties ◽  
Epoxy Resin ◽  
Cross Linking

Effect of Plasticizer and Cross-Linking Agent on the Physical Properties of Protein Films

2005 ◽  
Vol 10 (1) ◽  
pp. 88-91 ◽  
Author(s):  
Myoung-Suk Lee ◽  
Se-Hee Lee ◽  
Yu-Hyun Ma ◽  
Sang-Kyu Park ◽  
Dong-Ho Bae ◽  
...  
Keyword(s):  
Physical Properties ◽  
Cross Linking ◽  
Protein Films

scholarly journals Hydrophobic Modification of Graphene Oxide and Its Effect on the Corrosion Resistance of Silicone-Modified Epoxy Resin

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 89
Author(s):  
Wei Yuan ◽  
Qian Hu ◽  
Jiao Zhang ◽  
Feng Huang ◽  
Jing Liu
Keyword(s):  
Contact Angle ◽  
Corrosion Resistance ◽  
Graphene Oxide ◽  
Physical Properties ◽  
Epoxy Resin ◽  
Electrochemical Impedance ◽  
Salt Spray ◽  
X Ray ◽  
Modified Graphene Oxide ◽  
Modified Epoxy

This study modified graphene oxide (GO) with hydrophilic octadecylamine (ODA) via covalent bonding to improve its dispersion in silicone-modified epoxy resin (SMER) coatings. The structural and physical properties of ODA-GO were characterized by field-emission scanning electron microscopy (FE-SEM), X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and contact angle tests. The ODA-GO composite materials were added to SMER coatings by physical mixing. FE-SEM, water absorption, and contact angle tests were used to evaluate the physical properties of the ODA-GO/SMER coatings, while salt spray, electrochemical impedance spectroscopy (EIS), and scanning Kelvin probe (SKP) methods were used to test the anticorrosive performance of ODA-GO/SMER composite coatings on Q235 steel substrates. It was found that ODA was successfully grafted onto the surfaces of GO. The resulting ODA-GO material exhibited good hydrophobicity and dispersion in SMER coatings. The anticorrosive properties of the ODA-GO/SMER coatings were significantly improved due to the increased interfacial adhesion between the nanosheets and SMER, lengthening of the corrosive solution diffusion path, and increased cathodic peeling resistance. The 1 wt.% ODA-GO/SMER coating provided the best corrosion resistance than SMER coatings with other amounts of ODA-GO (including no addition). After immersion in 3.5 wt.% NaCl solution for 28 days, the low-frequency end impedance value of the 1 wt.% ODA-GO/SMER coating remained high, at 6.2 × 108 Ω·cm2.

scholarly journals Phenol Novalac Epoxy-modified unsaturated polyester hybrid networks by Silica Nanoparticles/ and Cross linking with Silane Compounds

2020 ◽  
Vol 1 (2) ◽  
pp. 28-32
Keyword(s):  
Epoxy Resin ◽  
Silica Nanoparticles ◽  
Elevated Temperatures ◽  
Unsaturated Polyester ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Hybrid Networks ◽  
Azo Compounds ◽  
Cross Linking ◽  
Chemical Attributes

In this study epoxy phenol novalac resin which consists of silica nanoparticles and unsaturated poly ester resin linked to the Silane and cross linking to that structure and also parameters affecting the processes involved have been evaluated. Cross linking in phenol novalac epoxy resins effects on many properties such as thermal, electrical, mechanical and chemical attributes especially in elevated temperatures. Silane cross-linking’s in phenol novalac epoxy resin with respect to other methods like proxiding, irradiation and utilization of Azo compounds, looks to be a very simple and low cost route, which makes it very encouraging for various industries. Unsaturated poly ester resin is compatible with phenol novalac epoxy resin and also creates some cross-linking and as far as tri methoxy Silane is added to the mentioned resin, its thermal, physical and mechanical properties are optimized. In this literature impact, tension, glass transition temperature, humidity absorption, FTIR and Scanning electron microscopy (SEM) tests were done and the results revealed that as the cross-linking occurs, tension in rupture region increases. This increase is more common at elevated temperatures. The growth in content of silica nanoparticles leads to a drop in water permeability of phenol novalac epoxy resin nanocomposite which contains unsaturated poly ester resin.

Investigation into the dynamics of physical properties of an epoxy resin during solidification

2009 ◽  
Vol 52 (5) ◽  
pp. 532-540
Author(s):  
V. I. Rimlyand ◽  
V. N. Starikova ◽  
A. V. Bakhantsov
Keyword(s):  
Physical Properties ◽  
Epoxy Resin

scholarly journals Reserch on cross-linking densities and fundamental physical properties of rubber.

1993 ◽  
Vol 66 (2) ◽  
pp. 117-123 ◽  
Author(s):  
Hideo NAKAUCHI ◽  
Sakae INOUE ◽  
Kazuo NAITO
Keyword(s):  
Physical Properties ◽  
Cross Linking ◽  
Fundamental Physical

scholarly journals Fibers Networks as a New Type of Core Material. Processing and Mechanical Properties

2009 ◽  
Vol 1188 ◽  
Author(s):  
Laurent Mezeix ◽  
Christophe Bouvet ◽  
Serge Crézé ◽  
Dominique Poquillon
Keyword(s):  
Epoxy Resin ◽  
Carbon Fibers ◽  
Sandwich Panels ◽  
Open Architecture ◽  
Core Material ◽  
Cross Linking ◽  
Damping Capacity ◽  
The Core ◽  
Water Accumulation ◽  
Core Materials

AbstractMany different sandwich panels are used for aeronautical applications. Open and closed cell structured foam, balsa wood or honeycomb are often used as core materials. When the core material contains closed cells, water accumulation into the cell has to be taken into account. This phenomenon occurs when in service conditions lead to operate in humidity atmosphere. Then, water vapor from air naturally condenses on cold surfaces when the sandwich panel temperature decreases. This water accumulation might increase significantly the weight of the core material. Core with a ventilated structure helps to prevent this phenomenon. Periodic cellular metal (PCM) has been motivated by potential multifunctional applications that exploit their open architecture as well as their apparent superior strength and stiffness: pyramidal, lattice, Kagome truss or woven. One of the drawbacks of these materials is the expensive cost of the manufacturing. Recently, a novel type of sandwich has been developed with bonded metallic fibers as core material. This material presents attractive combination of properties like high specific stiffness, good damping capacity and energy absorption. Metal fibers bonded with a polymeric adhesive or fabricated in a mat-like form consolidated by solid state sintering. Entangled cross-linked carbon fibers have been also studied for using as core material by Laurent Mezeix. In the present study, ventilated core materials are elaborated from networks fibers. The simplicity of elaboration is one of the main advantages of this material. Multifunctional properties are given by mixing different sorts of fibers, by example adding fibers with good electrical conduction to give electrical conductivity properties. In this study network fibers as core material are elaborated using carbon fibers, glass fibers and stainless steel fibers. In aeronautical skins of sandwich panels used are often carbon/epoxy prepreg, so epoxy resin was used to cross-link fibers. The core thickness was chosen at 30 mm and fibers length was chosen at 40 mm. Entanglement, separation of filaments and cross-linking are obtained in a specific blower room. Fibers are introduced in the blower room, compressed air is applied and in same time epoxy resin is sprayed. Indeed one of the sandwich core material properties required is low density, so yarns size need to be decreased by separating filaments. Network fibers are introduced in a specific mould and then are compressed. The density obtained before epoxy spaying is 150 kg/m3. Finally samples are polymerized at 80°C for 2 hours in a furnace under laboratory air. Compressive behavior is study to determinate the influence of fibers natures and the effect of cross-linking. Reproducibility is also checked.

Experimental Investigation on Volume Fraction of Mechanical and Physical Properties of Flax and Bamboo Fibers Reinforced Hybrid Epoxy Composites

2017 ◽  
Vol 25 (3) ◽  
pp. 229-236 ◽  
Author(s):  
S. Sathish ◽  
K. Kumaresan ◽  
L. Prabhu ◽  
N. Vigneshkumar
Keyword(s):  
Physical Properties ◽  
Epoxy Resin ◽  
Volume Fraction ◽  
Hybrid Composites ◽  
Sem Analysis ◽  
Epoxy Composites ◽  
Resin Matrix ◽  
Void Content ◽  
Mechanical And Physical Properties ◽  
Bamboo Fibers

The aim of this paper is to study the effect of volume fraction on mechanical and physical properties such as tensile, flexural, impact, interlaminar shear strength, void content and water absorption of flax and bamboo fibers reinforced hybrid epoxy composites. Flax and bamboo fibers reinforced epoxy resin matrix hybrid composites have been fabricated by compression molding techniques. The hybrid composites were fabricated with different volume fraction of fibers. SEM analysis on the hybrid composite materials was performed to analyze the bonding behavior of materials and internal structure of the fractured surfaces. The effect of chemical treatment of flax and bamboo fibers was verified by FTIR analysis. The results showed that the tensile, impact, flexural and ILSS are maximum for 40:0 (flax: bamboo) hybrid composites. The void content decreased for 20:20 (flax:bamboo) composites due to tightly packed flax fiber and more compatibility towards epoxy resin.

Analysis of the physcial properties of particleboard from a mixture of cocoa pod peel powder and styrofoam

2021 ◽  
Vol 5 (1) ◽  
pp. 7
Author(s):  
Ety Jumiati ◽  
Endang Sagita Ritonga ◽  
Abdul Halim Daulay
Keyword(s):  
Moisture Content ◽  
Physical Properties ◽  
Epoxy Resin ◽  
Powder Mixture ◽  
Surface Shape ◽  
Particle Board ◽  
Hot Press ◽  
Resin Adhesive ◽  
Cocoa Pod Husk ◽  
Epoxy Resin Adhesive

<p><strong><em>Abstract</em></strong><strong></strong></p><p><strong><em>Abstract. This study aims to determine the effect of optimal physical properties and microstructure on particleboard samples. The percentage variations of cocoa pod peel powder mixture, styrofoam with epoxy resin adhesive were sample A (69:0:30), sample B (68:2:30), sample C (67:3:30), and sample D (66:4:30). 6:30). The materials were compressed were a hot press and a conditioning time of 14 days. sThe most optimum particleboard sample was found in sample B with values of density, moisture content, and thickness expansion, respectively 0,80 g/cm</em></strong><strong><em><sup>2</sup></em></strong><strong><em>, 7,74%, and 9,32%, and met the standards of SNI 03-2105- 2006. The surface shape of the particle board morphology in sample B shows the composition of the material with the adhesive binding optimally so that there are very few empty spaces or cavities.</em></strong><strong></strong></p><h1 align="center"><em> </em></h1><p><strong><em>Keywords:</em></strong><em> cocoa pod husk powder, styrofoam, particle board, epoxy resin.</em></p>

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