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Biobased composites from glyoxal-phenolic resins and sisal fibers
(ELSEVIER SCI LTD, 2010)
Lignocellulosic materials can significantly contribute to the development of biobased composites. In this work, glyoxal-phenolic resins for composites were prepared using glyoxal, which is a dialdehyde obtained from several ...
Monitoring the process of densification of 3D and 4D (tridirectional and tetradirectional) carbon/carbon composites
(Sage Publications Ltd, 2015-05-01)
Carbon fiber reinforced carbon composites can be made by iterative liquid impregnation or gas phase carbon deposition routes. In both cases, at the final processing stage the carbon fiber is embedded in carbon matrix which ...
Chemical Modifications in Styrene-Butadiene Rubber after Microwave Devulcanization
(AMER CHEMICAL SOCWASHINGTON, 2012)
Microwave devulcanization has been studied as a method for elastomer recycling, which is based on the conversion of the reticulated and infusible structure of thermosetting rubbers in free polymeric chains able to be ...
Composites from a forest biorefinery byproduct and agrofibers: Lignosulfonate-phenolic type matrices reinforced with sisal fibers
(TECH ASSOC PULP PAPER IND INCNORCROSS, 2012)
The replacement of phenol with sodium lignosulfonate and formaldehyde with glutaraldehyde in the preparation of resins resulted in a new resol-type phenolic resin, sodium lignosulfonate-glutaraldehyde resin, in addition ...
Mechanical Properties Evaluation of a Recycled Flax Fiber-reinforced Vinyl Ester
(Sage Publications Ltd, 2005-06-01)
The effect of recycled powder incorporation on the mechanical properties of the thermosetting matrix (vinylester) and thermoplastic matrix (polypropylene) was studied. In the case of thermosetting matrix, flexural and ...
Inspeção termográfica de danos por impacto em laminados de matriz polimérica reforçados por fibras de carbono
(Associação Brasileira de Polímeros, 2009)
Laminados compósitos com matrizes poliméricas, respectivamente termorrígida e termoplástica, fortalecidas com fibras contínuas de carbono foram submetidos a impacto único transversal com diferentes níveis de energia. Os ...
One-pot thermo-remendable shape memory polyurethanes
(American Chemical Society, 2014-03-14)
Furan-based thermoset polyurethanes have been prepared in a one-pot fashion with the ability to self-mend under mild temperature conditions, by making use of a Diels-Alder shape-memory assisted self-mending (DASMASH) ...
Shape memory epoxy vitrimers based on DGEBA crosslinked with dicarboxylic acids and their blends with citric acid
(Royal Society of Chemistry, 2016-09-02)
Thermosetting polymers were synthesized from a commercial epoxy resin (diglycidyl ether of bisphenol A, DGEBA) and tricarboxylic (citric, CA) and different dicarboxylic (sebacic, SA and glutaric, GA) acids. Crosslinking ...
Exploring Microphase Separation Behavior of Epoxidized Poly(styrene‑b‑isoprene‑b‑styrene) Block Copolymer Inside Thin Epoxy Coatings
(American Chemical Society, 2013-03-15)
We report an investigation of the mechanisms involved in the formation of nanostructured epoxy thermosetting systems using highly epoxidized poly(styrene-b-isoprene-b-styrene) (eSIS) block copolymer at three different ...