Micro-ciiclectric nnnlysis (pIIEA) and diKerentia1 scanning caloririictry (DSC) were used to monitor cure of polymel-ic ciiplicnylmethane cliisocyanate (pMDl) resin with wood strands in a snturittcd steam environment. A first-order autocatalyzed kinetic model was employed to tieternline kinetic ~?ar:ln~ete~-s. The kinetics were found to follo~v an Arrhenius relation. A single ramp DSC tccliniy ...

Wood liquefaction was conducted at a 2/1 phenol/wood ratio in two different reactors: (1) an atmospheric three-necked flask reactor and (2) a sealed Parr reactor. The liquefied wood mixture (liquefied wood, unreacted phenol, and wood residue) was further condensed with formaldehyde under acidic conditions to synthesize two novolac-type liquefied wood/phenol/formaldehyde (LWPF) resins: LWPF1 (th...

1,2,3‐Tris(4‐cyanatophenyl)propane, a new tricyanate ester monomer analogous to cyanated novolac or “phenolic triazine (PT) resin” that features more flexible chemical linkages at the central branch point, was synthesized in nine steps with an overall yield of 26%. The highly purified monomer exhibited an activation energy of 110 kJ/mol for auto‐catalytic cure at temperatures of 210 °C ...

The successful manufacture of thick-sectioned composites is challenging, since the highly exothermic nature of thermoset resins and limited temperature control make it difficult to avoid detrimental thermal and cure gradients within the composite. In order to make quality parts, it has been found experimentally that cure temperatures must be lowered as much as 50% from those suggested for thin ...

effect of partial natural rubber replaced with synthetic rubbers, styrene butadiene and cis butadiene, on failure and strength properties of bias tread nr/br based compound was studied by efficient and conventional sulfur curing systems and mixtures of different carbon black grades. it was observed that failure behavior comprising tear resistance and crack growth in substituted compounds droppe...

We studied the mechanism of volatile-induced surface porosity formation during the resin transfer molding (RTM) of aerospace composites using a blended benzoxazine/epoxy resin, and identified reduction strategies based on material and processing parameters. The influence of viscosity and pressure on resin volatilization were determined. Then, in situ data was collected during molding using a la...