25 documents found, page 1 of 3

Dynamic mechanical analysis and creep-recovery behavior of agglomerated cork

The mechanical behavior of agglomerated cork, made of cork granules bound with polyurethane moisture-cured adhesive is investigated and compared to natural cork in the small strain regime (strain < 5%). Dynamic mechanical analysis (DMA) of the agglomerated material revealed two distinct thermal transitions, one at -45 A degrees C, related to the glass transition of polyurethane, and one at 3 A degrees C, associ...

Preparation of amino resins and their impact on the production of wood-based pa...

Greener urea-formaldehyde resins for the production of particleboards

Determination of Resin and Moisture Content in Melamine Formaldehyde Paper usin...

Development of amino resin with flexible performance

Preparation of robust polyamide microcapsules by interfacial polycondensation o...

Microcapsules produced by interfacial polycondensation of p-phenylenediamine (PPD) and sebacoyl chloride (SC) were studied. The products were characterized in terms of morphology, mean diameter and effectiveness of dodecane encapsulation. The use of Tween 20 as dispersion stabilizer, in comparison with polyvinyl alcohol (PVA), reduced considerably the mean diameter of the microcapsules and originated smoother w...

Viscoplastic model analysis about the influence of graphene reinforcement in po...

Biodegradable polymers can be applied to produce automobile parts, following ecological recommendations and eco-design philosophies. In some applications, a constant or dynamic load applied to the part can further reduce its life cycle due to creep or fatigue cumulative damage. Hence, the reinforcement of these polymers with graphene may enhance the mechanical properties and change the time-dependent mechanical...

Evaluation of bonding performance of amino polymers using ABES

In this paper, the use of Automated Bonding Evaluation System (ABES) for evaluation of bonding strength of wood adhesives is presented. A simple reactive model is proposed, which considers the phenomena involved during resin cure: formation of wood-resin-wood bonds. In the present study, experimental data of a standard urea-formaldehyde (UF) resin using different catalysts, phosphoric acid and ammonium sulphate...

Low density polyester particles for lightweight wood based composites

Stabilization of nano-TiO2 aqueous dispersions with poly(ethylene glycol)-b-pol...

In this work, TiO2 nanoparticles were dispersed and stabilized in water using a novel type of dispersant based on tailor-made amphiphilic block copolymers of poly(ethylene glycol)-block-poly(4-vinyl pyridine) (mPEG-b-P4VP) prepared by atom transfer radical polymerization (ATRP). The performance of this new block copolymer as dispersant was compared to a polyelectrolyte dispersant commonly used for TiO2, sodium ...