f] is the final conversion obtained following the isothermal cure cycle at a given curing temperature
Table 6 shows that there is little correlation between the force values observed and the curing temperature
Decreases in the maximum exothermic peak value and peak shifts to longer times were observed as the isothermal curing temperature
These variations are too significant to provide a very consistent process without adjusting the settings of the extrusion line, such as screw speed and curing temperature
The vitrification occurs when the glass transition temperature (Tg) approaches the curing temperature
They are referred to as an injection molder's dream, by not being scorchy at 250*F processing temperatures and not retarding at 300*F curing temperature
In the experiment, the base line was determined by equilibrating the instrument at a predetermined curing temperature
with an empty sample pan, and the heat/time curve was initiated by inserting a pan containing the sample.
The optimum cure time decreases as the curing temperature
The curing temperature
was reached in 75 seconds by heating the oven of the rheometer from room temperature.
The adhesion development between the RFL adhesive and rubber compound during cure is a time/temperature phenomenon (activation energy) involving critical scorch time at the curing temperature
It was found that oxirane ring undergoes nucleophilic attack by the primary amine groups of chitosan and the degree of crosslinking increased with increase in curing time, curing temperature
and concentration of chitosan.
This shall be an optimisation between extended pot-life as well as minimisation of curing temperature
for a variety of target applications.