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Propiedades viscoelásticas de laminados basados en resinas de fenol-formaldehído modificadas con lignina del tipo Kraft
(2015-10-20)
Las resinas de fenol-formaldehído son ampliamente utilizadas en la obtención de laminados
decorativos. El alto costo y la toxicidad del fenol empleado en la formulación de resinas fenólicas
incentiva la búsqueda de nuevas ...
Hydroxymethylation of technical lignins from south-american sources with potential use in phenolic resins.
(2019-02-16)
This work investigates the valorization of sodium lignosulfonate, kraft, and organosolv lignins from South America. A detailed characterization of the lignins and their chemical modification by hydroxymethylation, a reaction ...
Microparticles based on ionic and organosolv lignins for the controlled release of atrazine
(Journal of Hazaourdos Materials, 2018-07-02)
Lignins are natural polymers of the lignocellulosic biomass. Nowadays, there is a growing interest in developing value-added products based on lignins due to their renewability, low cost and abundance. In this work, ...
Síntesis y caracterización de nuevas polibenzoxazinas termoestables
(2015-10-20)
Se sintetizaron y caracterizaron dos nuevas benzoxazinas denominadas “Bz-FA” y “Bz-PFA” conteniendo grupos funcionales ácidos en su estructura. Se estudió la reacción de curado por Espectroscopía de Infrarrojo (FT-IR) y ...
Preparation and Characterization of Lignin Microparticles-in-Alginate Beads for Atrazine Controlled Release
(2019-09-21)
The use of lignin as polymeric matrices for controlled release systems in agriculture is a promising alternative for its reval-orization. In this work, diferent atrazine delivery systems were studied. Lignin derived from ...
Mechanical evaluation of laminates based on phenolic resins using lignins as partial substitutes for phenol
(Bioresources, 2015-10-28)
Reducing the consumption of phenol during synthesis of phenolic resins is of great technological and scientific interest because of its economic and environmental implications. In this work, the use of hydroxymethylated ...
Synthesis and mechanical characterization of high pressure laminates modified with Kraft lignin
(255th ACS National Meeting Exposition New Orleans, 2018-04)
Phenol-formaldehyde resins (PF) are thermosetting polymers used as adhesives for plywoods and other structural wood products including high pressure laminates (HPLs). HPLs are composite materials comprised of a paper-based ...
Synthesis and mechanical properties of laminates based on phenolic resins modified with sodium lignosulfonate.
(Latin American Applied Research, 2017-05-08)
The reduction of phenol and/or formalde-hyde consumption during phenolic resin synthesis is of great technological and scientific interest because of its economic and environmental implications.
In this work, the addition ...
Synthesis and characterization of new thermosetting polybenzoxazines with other functional groups in the network
(Journal of Polymer Research, 2018-03-03)
The reduction of phenol and/or formalde-hyde consumption during phenolic resin synthesis is of great technological and scientific interest because of its economic and environmental implications.
In this work, the addition ...
Paneles de Madera Conglomerada Basados en Resinas Ureicas. Efecto de la densidad sobre las propiedades mecánicas.
(2017-03-30)
En este trabajo se estudió teórica y experimentalmente la relación entre la densidad y las propiedades mecánicas de paneles de madera conglomerada obtenidos a partir de un 88,5 % de partículas de madera y un 11,5% de resina ...