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Nanohole volume dependence on the cure schedule in epoxy thermosetting networks: A PALS study
(Elsevier, 2006-12)
A systematic study on the dependence of the volumes at nanoscale in epoxy systems cured with two selected aminic hardeners at different pre-cure temperatures is presented. Nanohole volumes were measured by positron ...
Resol/montmorillonite nanocomposites obtained by in situ polymerization
(John Wiley & Sons Inc, 2009-05-27)
Nanocomposites based on resol resin and layered silicates were obtained by in situ polymerization. An increment in the viscosity and in the content of free formaldehyde in the prepolymer with the addition of clay was ...
Mechanistic kinetic model of an epoxy resin cured with a mixture of amines of different functionalities
(Elsevier, 2005-09)
The polymerization kinetics of a monoamine (p-toluidine), a diamine (4,4′-diaminodiphenylmethane) or a mixture of both amines reacted with an epoxy prepolymer, diglycidylether of bisphenol A (DGEBA), was analyzed using ...
Influence of fiber volume fraction and aspect ratio in Resol-Sisal composites
(John Wiley & Sons Inc, 2003-06)
Vegetable fibers are being used as reinforcements in polymeric matrices with a wide variety of applications. Among these fibers, sisal is of particular interest due to the high impact strength and moderate tensile and ...
Ageing of thermosets based on tung oil/styrene/divinylbenzene
(Elsevier, 2012-10-31)
New thermoset polymers prepared by cationic co-polymerization of tung oil with styrene and/or divinylbenzene were evaluated at different times after their preparation. The changes in the properties were correlated with ...
Resin–Sisal and wood flour composites made from unsaturated polyester thermosets
(Taylor & Francis, 2008-08-06)
Short fibers and wood flour were selected as fillers in the production of two types of unsaturated polyester composites (bisphenolic and isophthalic-based thermosets). Sisal fibers were subjected to washing in order to ...
Particleboards from peanut-shell flour
(John Wiley & Sons Inc, 2005-08)
Peanuts have been cultivated worldwide for hundreds, if not thousands, of years. However, most peanuts are sold without the shell, and so large quantities of peanut shells remain as byproducts in the field, not being used ...
Comparative effects of two different crosslinkers on the properties of vegetable oil-based polyurethanes
(John Wiley & Sons Inc, 2020-06)
Thermoset polyurethanes (PUs) were prepared from a polyol derived from castor oil, 4,4′-methylene diphenyl diisocyanate (MDI) and different trifunctional low-molecular-weight crosslinkers, biobased glycerol (Gly) and ...
Influence of the Addition of Polystyrene-blockpoly(methyl methacrylate) Copolymer (PS-b-PMMA) on the Morphologies Generated by Reaction-Induced Phase Separation in PS/PMMA/Epoxy Blends
(Wiley VCH Verlag, 2002-04-11)
Homogeneous solutions of polystyrene (PS) and poly(methyl methacrylate) (PMMA) in diglycidylether of bisphenol A, containing about 8 wt.‐% total thermoplastic, and with or without 0.5 wt.‐% of a PS‐b‐PMMA block copolymer, ...
Vegetable oil/styrene thermoset copolymers with shape memory behavior and damping capacity
(John Wiley & Sons Ltd, 2012-05)
The mechanical and damping properties as well as the shape memory behavior of copolymers obtained by cationic copolymerization of tung oil with styrene with different stoichiometric ratios are presented and analyzed in ...