PHENOLIC RESINS
Optimizing size and distribution of voids in phenolic resins through the choice of catalyst types
... the phenolic produced in a fast curing process and com- pare their mechanical properties to a void-free reference ...resole phenolic resin material was produced using a long cure cycle (4 days) without the ...
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Production and Applications of Formaldehyde-Free Phenolic Resins Using 5-Hydroxymethylfurfural Derived from Glucose In- Situ
... Due to the concerns of formaldehyde emission from the HMTA-cured novolac, it is necessary to find an alternative to HMTA as a curing agent for novolac phenolic resins. Epoxides have high reactivity towards ...
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Best percentage by weight of micro-spheres as fillers in phenolic resins, with fracture toughness as a benchmark
... If moulded without fillers or reinforcements, phenolic components can be brittle and have high shrinkage in the mould. This is expected from the highly aromatic and multiple cross linked nature of cured ...
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Synthesis and characterization of modified phenolic resins for composites with enhanced mechanical properties
... the resins II and III (see Figure 5) show a decrease with increasing cardanol ...other resins and stay relatively constant with increasing cardanol ...the phenolic resin with neat phenol, J2027L ...
6
Blends of unsaturated polyester and phenolic resins for application as fire-resistant matrices in fibre-reinforced composites. Part 2: Effects of resin structure, compatibility and composition on fire performance
... four phenolic resins, PH1 has highest TTI (84 s), followed by PH4 (72 s), while PH2 and PH3 ignite after 33 and 35 s, ...the phenolic resins, has a much higher TTI than that of either PH2 or ...
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Condensation reactions of phenolic resins IV: self-condensation of 2,4-dihydroxymethylphenol and 2,4,6-trihydroxymethylphenol (2)
... The major part of curing alkaline phenolic resins is ascribed to the condensation reactions of hydroxymethylphenols (HMPs). However, the mechanisms of the condensation reactions of HMPs have not yet been ...
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Enhanced Thermal Conductivity of Carbon Nanotube Arrays by Carbonizing Impregnated Phenolic Resins
... A carbonization method is reported to improve the thermal conductivity of carbon nanotube (CNT) arrays. After being impregnated with phenolic resins, CNT arrays were carbonized at a temperature up to ...
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Production of Lignin-Based Phenolic Resins Using De-Polymerized Kraft Lignin and Process Optimization
... States, phenolic resins with up to 35% phenol replacement have been favorably used in applications of fiberboard bonding and plywood adhesives (Cheng, ...
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Synthesis of elastomeric phenolic resins with improved toughness and flexibility
... a phenolic resin a modified PF resin, such as CPF with Cardanol, , has to be ...CPF resins and of the CPF/PF resin blends are presented in ...CPF resins showed a decrease with increasing Cardanol ...
5
Blends of unsaturated polyester and phenolic resins for application as fire-resistant matrices in fibre-reinforced composites: Effects of added flame retardants
... UP resins, namely by blending and co-curing them with inherently flame-retardant resins such as char-forming phenol-formaldehyde and melamine-formaldehyde resins [9, 10, ...thermosetting ...
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Condensation reactions of phenolic resins VII: catalytic effect of sodium bicarbonate for the condensation of hydroxymethylphenols
... PF resins still need a curing temperature that is about 10°C higher than that for amino ...PF resins and the effects of cure accelerators must be ...PF resins and found that PC increased the ...
6
Condensation reactions of phenolic resins V: cure-acceleration effects of propylene carbonate
... cure accelerators have achieved considerable improve- ments. However, PF resin still needs curing temperatures higher (about 10°C) than those for amino resins. To seek further improvement, the mechanisms of curing ...
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Condensation reactions of phenolic resins III: self-condensations of 2,4-dihydroxymethylphenol and 2,4,6-trihydroxymethylphenol (1)
... These results indicate that unimolecular reaction(s) and bimole- cular reaction(s) take place simultaneously as the rate- determining step in the condensation reacti[r] ...
6
Synthesis of modified phenolic resins using renewable materials for advanced composites in civil engineering structures
... (PF) resins are made from Benzene a petroleum ...PF resins are among the most widely used thermosets because of their economics on a cost-per-volume ...
138
A spectroscopic analysis of carbons derived from heat treated phenolic resins
... The main pyrolysis chemical reactions have been shown to occur in this temperature range, and therefore such measurements as the removal of methylene bridges, hydroxyl groups and aliphat[r] ...
222
Comparison of protein-based adhesive resins for wood composites
... Protein-based resins containing up to 70% protein and cross-linked with PF resins performed well in laboratory production of MDF and ...protein-based phenolic resins met the requirements for ...
6
Synthetic resins and their properties in respect of development of jute based composite boards
... of resins that are commonly used. Amino, formaldehyde based resins are the best performing when considering cost and ease of ...Melamine resins are used to offer water resistance with increased ...
8
Synthesis of phenolic bio-resins for advanced composites in civil engineering structures
... PF phenolic resins were modified to enable their application in modern composites ...PF resins. The modified phenolic resins (CPF) were prepared at various molar ratios of the total ...
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Wiley The Chemistry of Phenols 2003 pdf
... of phenolic resins (plastics). These resins are important components of such items as appliance knobs, handles and housings, washing machine agitators and electrical ...
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Development of polymer network of phenolic and epoxies resins mixed with linseed oil: pilot study
... with phenolic resins in different percentages by ...two resins results also in the formation of interpenetrating network irrespective of proportion by weight of the resins; the mechanical ...
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