Results 21 to 30 of about 10,556 (300)

One-Step Densification of Carbon/Carbon Composites Impregnated with Pyrolysis Fuel Oil-Derived Mesophase Binder Pitches

open access: yesC, 2020
Carbon/carbon (C/C) composites are conventionally manufactured by liquid-phase impregnation (LPI), in which the binder pitches and phenolic resins are impregnated into the composites, and by chemical vapor infiltration (CVI).
Jae-Yeon Yang   +4 more
doaj   +1 more source

Curing of Maleimidyl Phenol-Formaldehyde Resins Via Esterification and Free Radical Polymerization

open access: yesمجلة بغداد للعلوم, 2007
Three phenol-formaldehyde resins having pendant maleimides were prepared by poly condensation of N-(hydroxyphenyl) maleimides with formaldehyde under conditions similar to those in Novolac preparation.
Baghdad Science Journal
doaj   +1 more source

Low Formaldehyde Binders for Mineral Wool Insulation: A Review

open access: yesGlobal Challenges, 2022
Insulating materials are ubiquitous in a built environment and play a critical role in reducing the energy consumed to maintain habitable indoor environments. Mineral wool insulation (MWI) products, including glass, stone, and slag variants, are the most
Thomas M. Bennett   +3 more
doaj   +1 more source

Use of Modified Phenolic Thyme Extracts (Thymus vulgaris) with Reduced Polyphenol Oxidase Substrates as Anthocyanin Color and Stability Enhancing Agents

open access: yesMolecules, 2015
Residual enzymatic activity in certain foods, particularly of polyphenoloxidase (PPO), is responsible for the majority of anthocyanin degradation in food systems, causing also parallel losses of other relevant nutrients.
Oscar Aguilar, Carmen Hernández-Brenes
doaj   +1 more source

Novel phenolic resins with improved mechanical and toughness properties

open access: yes, 2011
Novel phenolic type of thermoset resins were synthesized, and their mechanical and toughness properties were evaluated. Phenol Formaldehyde (PF) phenolic resins were modified to broaden their applications for modern composite structures.
Cardona, F   +8 more
core   +1 more source

Improved Performances of SiBCN Powders Modified Phenolic Resins-Carbon Fiber Composites

open access: yes, 2021
The effect of SiBCN powder on properties of phenolic resins and composites was analyzed. Compared with phenolic resins, the thermal stability of SiBCN powder modified phenolic resins (the SiBCN phenolic resins) by characterization of thermogravimetric ...
Zhenhua Luo   +5 more
core   +1 more source

Estabelecimento de parâmetros reológicos na obtenção de compósitos carbono/fenólica Establishment of rheological parameters in carbon/phenolic composites processing 59

open access: yesPolímeros, 1999
As resinas fenólicas têm sido utilizadas no processamento de compósitos carbono/carbono, produzindo um material intermediário conhecido como compósito carbono/fenólica.
Edson C. Botelho   +2 more
doaj   +1 more source

Processing of Functional Composite Resins Using Deep Eutectic Solvent

open access: yesCrystals, 2020
Deep eutectic solvents (DESs)—a promising class of alternatives to conventional ionic liquids (ILs) that have freezing points lower than the individual components—are typically formed from two or more components through hydrogen bond interactions. Due to
Jing Xue   +4 more
doaj   +1 more source

Phytochemical Properties and In Vitro Biological Activities of Phenolic Compounds from Flower of Clitoria ternatea L.

open access: yesMolecules, 2022
Phenolic compounds from the flower of Clitoria ternatea L. (PCFCTL) were extracted using a high-speed shearing extraction technique and purified by AB-8 macroporous resins, and the phytochemical composition of the purified phenolic compounds from the ...
Chao Li   +7 more
doaj   +1 more source

Utilização de ligninas em resinas fenólicas: 1. Preparação de novolacas a partir de lignossulfonatos Use of lignins in phenolic resins: 1. Preparation of novolacs from lignosulfonates 49

open access: yesPolímeros, 1999
Este trabalho descreve uma utilização mais nobre para a lignina obtida de processos industriais de polpação. Foram preparadas resinas fenólicas tipo novolaca, utilizando-se lignossulfonato de amônio e lignossulfonato de sódio (com diferentes teores de ...
Fernando dos Santos   +1 more
doaj   +1 more source

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