Synergistic effect of P S and crosslink density on performance properties of epoxy coatings cured with cardanol based multifunctional carboxyl curing agents

2018 ◽  
Vol 128 ◽  
pp. 74-83 ◽  
Author(s):  
Kunal Wazarkar ◽  
Anagha Sabnis
Keyword(s):  
Synergistic Effect ◽  
Crosslink Density ◽  
Epoxy Coatings ◽  
Performance Properties ◽  
Curing Agents

Synergistic effect of carbon nanotubes bonded graphene oxide to enhance the flame retardant performance of waterborne intumescent epoxy coatings

2022 ◽  
Vol 162 ◽  
pp. 106598
Author(s):  
Chunlin Chen ◽  
Guoqing Xiao ◽  
Fei Zhong ◽  
Shaotang Dong ◽  
Zhengwei Yang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Synergistic Effect ◽  
Flame Retardant ◽  
Epoxy Coatings

Phenalkamine curing agents for epoxy resin: characterization and structure property relationship

2018 ◽  
Vol 47 (4) ◽  
pp. 281-289 ◽  
Author(s):  
Kunal Wazarkar ◽  
Anagha S. Sabnis
Keyword(s):  
Epoxy Resin ◽  
Electrochemical Impedance ◽  
Salt Spray ◽  
Structure Property ◽  
Cashew Nut Shell Liquid ◽  
Performance Properties ◽  
Content Type ◽  
Cashew Nut ◽  
Curing Agents ◽  
Cashew Nut Shell

Purpose The purpose of this study is to synthesize structurally different phenalkamines based on cardanol, a renewable material obtained from cashew nut shell liquid, and to evaluate their effect on performance properties of the coatings. Design/methodology/approach For this purpose, the Mannich reaction between cardanol, formaldehyde and various diamines such as diaminodiphenyl methane (DDM), hexamethylene diamine, Jeffamine D400 and Jeffamine T403 were carried out to produce novel phenalkamines. Resultant phenalkamines were used as curing agents for commercial DGEBPA epoxy resin and were evaluated for performance properties. Findings The mechanical, optical, chemical, thermal and anticorrosive properties were evaluated and compared with those of commercial phenalkamine AG141. It was observed that anticorrosive properties evaluated using a salt spray test and electrochemical impedance spectroscopy revealed significant improvement in anticorrosive performance of coatings cured with synthesized phenalkamines based on DDM and T403 as compared to the coatings based on commercial phenalkamine AG141. Research limitations/implications To obtain optimum performance properties of the coatings, a combination of phenalkamines can be used. Practical implications Curing time and gel times of all the phenalkamines can be further studied under wet and humid conditions. In addition, the variation in coating properties under humid conditions can be investigated. Originality/value In this study, newer phenalkamines were synthesized and used as curing agents for epoxy coatings. So far, there have been no reports indicating the synthesis and application of phenalkamines based on polyetheramines, namely, Jeffamine D400 and Jeffamine T403, in coating applications.

Enhancement of the crosslink density, glass transition temperature, and strength of epoxy resin by using functionalized graphene oxide co-curing agents

2016 ◽  
Vol 7 (1) ◽  
pp. 36-43 ◽  
Author(s):  
Jin Won Yu ◽  
Jin Jung ◽  
Yong-Mun Choi ◽  
Jae Hun Choi ◽  
Jaesang Yu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Graphene Oxide ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Epoxy Resin ◽  
Crosslink Density ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Curing Agents

Epoxy nanocomposites are fabricated by using diamine-functionalized GO and exhibit high Tg, tensile strength, and crosslink density.

Synergistic effect of graphene oxide@phosphate-intercalated hydrotalcite for improved anti-corrosion and self-healable protection of waterborne epoxy coating in salt environments

2019 ◽  
Vol 7 (8) ◽  
pp. 2318-2326 ◽  
Author(s):  
Chunlin Chen ◽  
Yi He ◽  
Guoqing Xiao ◽  
Fei Zhong ◽  
Hongjie Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Synergistic Effect ◽  
Self Assembly ◽  
Epoxy Coating ◽  
Epoxy Coatings ◽  
Waterborne Epoxy

Waterborne epoxy coatings (WECs), with significant anti-corrosion and self-healable performance were obtained through electrostatic self-assembly of graphene oxide (GO) and phosphate (PO43−)-intercalated hydrotalcite (PIH).

Influences of Coagent Hybrid Ratios and Silanes on Viscoelastic Properties of Silica-Filled HNBR

2013 ◽  
Vol 747 ◽  
pp. 564-567 ◽  
Author(s):  
Manuchet Nillawong ◽  
Pongdhorn Sae-Oui ◽  
Chakrit Sirisinha
Keyword(s):  
Shear Flow ◽  
Synergistic Effect ◽  
Hybrid System ◽  
Viscoelastic Properties ◽  
Crosslink Density ◽  
The Other ◽  
Efficiency Enhancement ◽  
Vinyl Silane ◽  
Oscillatory Shear Flow ◽  
Composition Ratios

Silica filled HNBR compounds were prepared, and modified with 2 different silanes, namely, mercapto silane (TESPT) and vinyl silane (VTEO). Because the HNBR was cured with peroxide, the 2 coagents (TRIM and ZDA) were used simultaneously as a hybrid system for a purpose of cure efficiency enhancement. Various composition ratios of TRIM to ZDA were used in association with 2 different silanes. Results of viscoelastic properties, as investigated by RPA2000 via oscillatory shear flow, suggest the different suitability of coagent hybrid ratio in the system with different silanes. Due to the released sulfur molecules from TESPT, a cure retardation phenomenon is resulted. The use of high ZDA composition leads to improved viscoelastic and cure properties in TESPT filled system. On the other hand, the system modified with VTEO reveals the synergistic effect of VTEO and TRIM, probably via a co-crosslink, resulting in the enhanced crosslink density, especially at high composition ratio of TRIM.

High-Energy Dissipation Performance in Epoxy Coatings by the Synergistic Effect of Carbon Nanotube/Block Copolymer Conjugates

2016 ◽  
Vol 9 (1) ◽  
pp. 930-943 ◽  
Author(s):  
Hernan Garate ◽  
Micaela Bianchi ◽  
Lía I. Pietrasanta ◽  
Silvia Goyanes ◽  
Norma B. D’Accorso
Keyword(s):  
Carbon Nanotube ◽  
Energy Dissipation ◽  
Block Copolymer ◽  
Synergistic Effect ◽  
High Energy ◽  
Epoxy Coatings ◽  
High Energy Dissipation
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