scholarly journals Development of CFRTP Intermediate Substrates Using in-Situ Polymerizable Thermoplastic Epoxy Resin

2021 ◽  
Vol 77 (7) ◽  
pp. 188-195
Author(s):  
Wataru Okumura ◽  
Hirofumi Nishida ◽  
Katsuhiko Nunotani ◽  
Etsuro Sugimata ◽  
Hiroyuki Hasebe ◽  
...  
Keyword(s):  
Epoxy Resin

scholarly journals Enhanced Tensile Strength of Monolithic Epoxy with Highly Dispersed TiO2-Graphene Nanocomposites

2021 ◽  
Vol 5 (7) ◽  
pp. 191
Author(s):  
Yanshuai Wang ◽  
Siyao Guo ◽  
Biqin Dong ◽  
Feng Xing
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Mechanical Performance ◽  
Chemical Properties ◽  
High Mechanical Property ◽  
Graphene Nanocomposites ◽  
Highly Dispersed ◽  
Dispersion State ◽  
Physical And Chemical

The functionalization of graphene has been reported widely, showing special physical and chemical properties. However, due to the lack of surface functional groups, the poor dispersibility of graphene in solvents strongly limits its engineering applications. This paper develops a novel green “in-situ titania intercalation” method to prepare a highly dispersed graphene, which is enabled by the generation of the titania precursor between the layer of graphene at room temperature to yield titania-graphene nanocomposites (TiO2-RGO). The precursor of titania will produce amounts of nano titania between the graphene interlayers, which can effectively resist the interfacial van der Waals force of the interlamination in graphene for improved dispersion state. Such highly dispersed TiO2-RGO nanocomposites were used to modify epoxy resin. Surprisingly, significant enhancement of the mechanical performance of epoxy resin was observed when incorporating the titania-graphene nanocomposites, especially the improvements in tensile strength and elongation at break, with 75.54% and 176.61% increases at optimal usage compared to the pure epoxy, respectively. The approach presented herein is easy and economical for industry production, which can be potentially applied to the research of high mechanical property graphene/epoxy composite system.

Si/Cu/C Nanohybrid Lithium-Ion Battery Anode with in Situ Incorporation of Nonagglomerated Super-Small Copper Nanoparticles Based on Epoxy Resin

2021 ◽  
Vol 35 (7) ◽  
pp. 6250-6264
Author(s):  
Kai Fang ◽  
Liujia Ma ◽  
Ya-Jun Cheng ◽  
Senlin Xia ◽  
Zhaohui Yang ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Lithium Ion Battery ◽  
Copper Nanoparticles ◽  
Lithium Ion ◽  
Battery Anode

In-situ Repair of Marine Coatings by a Fe3O4 Nanoparticle-Modified Epoxy Resin under Seawater

2021 ◽  
pp. 132827
Author(s):  
Zhenliang Feng ◽  
Rongjian Wan ◽  
Shiming Chen ◽  
Xiao Tang ◽  
Hong Ju ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Fe3o4 Nanoparticle ◽  
Marine Coatings ◽  
Modified Epoxy ◽  
In Situ Repair

Epoxy resin modified with in situ generated metal oxides by means of sol-gel process

2011 ◽  
Vol 122 (3) ◽  
pp. 1792-1799 ◽  
Author(s):  
Federica Bondioli ◽  
Maria Elena Darecchio ◽  
Adrian S. Luyt ◽  
Massimo Messori
Keyword(s):  
Metal Oxides ◽  
Epoxy Resin ◽  
Sol Gel ◽  
Sol Gel Process

Improving aramid pulp dispersion in epoxy resin via the in situ preparation of SiO 2 on an aramid pulp surface

2020 ◽  
Vol 41 (4) ◽  
pp. 1683-1693 ◽  
Author(s):  
Haiquan Ding ◽  
Haijuan Kong ◽  
Hui Sun ◽  
Qian Xu ◽  
Juan Zeng ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
In Situ Preparation

Sand-Consolidation Resins - Their Stability in Hot Brine

1983 ◽  
Vol 23 (02) ◽  
pp. 238-248 ◽  
Author(s):  
Roger F. Rensvold
Keyword(s):  
Epoxy Resin ◽  
Phenol Formaldehyde ◽  
Test Fluid ◽  
Resin System ◽  
Silane Coupling Agents ◽  
System A ◽  
Sand Control ◽  
Epoxy Resin System ◽  
The Stability

Abstract Four commercial in-situ sand-consolidation resin systems and one resin-sandpack system were tested for durability in hot [160°F (71.1°C)] flowing brine for up to 28 months, and in as much as 30 million PV brine. Brine was selected as the test fluid since it is considered to be more damaging than oil to the stability of resin-consolidated sand. Two epoxy and two furan systems were investigated. Other commercial consolidation techniques - e.g., involving phenol formaldehyde and phenolic furan resins described in the literature1 - have been recognized as effective sand-stabilization products; however, some limitations had to be placed on the scope of the study because of equipment and time limitations. Perhaps these techniques will be the subject of future investigations. Note that all processes evaluated in this investigation used silane coupling agents contained in the resinous materials. These agents increase the stability of sands consolidated by organic polymers.2 The overflush-catalyzed furan resin (System A) and the internally catalyzed epoxy resin (System D) demonstrated greater stability under the specific test conditions employed. System A retained higher strength during the first 15 million PV. Thereafter, System D appeared to be better. System A exhibited the highest initial permeability, and, after 5 million PV, Systems A, B, and D were about equal in permeability. From that point, the permeability of System A slowly increased, while decreasing for Systems B and D. The epoxy-resin sandpack (40- to 60-mesh sand) showed little change in compressive strength after exposure to more than 30 million PV of hot, flowing brine. Introduction The current energy situation emphasizes the importance of utilizing the most efficient completion and production techniques to maximize production. Higher rates of production often can create conditions that, if not anticipated, can lead to unnecessary workover expense. Oil production from unconsolidated sands continues to demand effective and long-lasting sand-control procedures. Gravel packing, while often the most economical sand-control process, presents problems in multiple-zone completions, where it is necessary to stop sand production from intermediate and upper producing zones without interfering with the production from lower intervals. In-situ consolidation of incompetent producing sands with resin allows production from upper intervals without sand-control equipment in the borehole that would hinder production from lower zones. Such procedures are recommended for intervals that have not already produced appreciable quantities of formation sand. In cases where formation sand has been produced, it is desirable to pack the zone with a closely graded, resin-coated sand. The resultant consolidated pack provides a strong, highly permeable medium between the incompetent formation and the borehole. Two types of resin being used in the industry for in-situ consolidation and resin-bonded sandpacks are furans and epoxies. It is important that any procedure involving the use of these resins results in effective, durable protection against the production of formation sand.

Cure Behaviour and Structure of Dicyanate-Epoxy Novolac Blends

2002 ◽  
Vol 10 (3) ◽  
pp. 237-248 ◽  
Author(s):  
Baochun Guo ◽  
Weiwen Fu ◽  
Demin Jia ◽  
Qinghua Qiu ◽  
Lei Wang
Keyword(s):  
Bisphenol A ◽  
Epoxy Resin ◽  
Curing Kinetics ◽  
In Situ Ftir ◽  
Reaction Products ◽  
Curing Mechanism ◽  
Cure Behaviour ◽  
Time Determination ◽  
Novolac Epoxy

The cure characteristics of bisphenol A dicyanate-novolac epoxy resin blends were investigated by gel time determination and dynamic DSC. The effects of the proportion on the structures of cured blends were investigated by FTIR. In situ FTIR was utilized to study the curing mechanism and curing kinetics. The results indicated the distinct catalytic effects of the novolac epoxy resin on the curing of bisphenol A dicyanate. Due to considerable amounts of unepoxidized phenol present in the novolac epoxy resin, the reactions between phenol and cyanate disturbed the formation of the co-reaction products. The curing reactions of the blends indicated by in situ FTIR did not follow the Bauer mechanism totally. A composite mechanism of triazine-epoxy insertion and epoxy-cyanate reaction indwells in the systems. The authors suggest that most of the oxazolidinone present in the blends is formed by isomerization of oxazoline rather than by insertion of epoxy into isocyanurate. The amount of epoxy resin in the blend did not alter the curing mechanism, but had significant effects on the kinetic behaviour.

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