Stream change learn the application in epoxy resin

Stream change learned to provide a kind of good means to solve problem of actual production technology, it is connection material, production and product the effective bridge between final performance. In colophony of hot solid sex, any little change of composition can affect solidify behaviour, change the property of end item thereby, if pursue,6-11 place is shown.

Stream change learned to offer dog to solid from low viscosity fluid the method that solidify reacts, and dynamic and mechanical experiment is inside broad temperature range the modular quantity of token material and damp behavior, gave out the data of peak of δ of vitrification temperature, Tan, α and β transition process, contact with the data such as impact strength and creep function.

One, solidify behavior and treatment craft sex

Graph 6-12 shows the solidify experiment in a model is medium, the relation of viscosity and experimental temperature and reaction time. In the experiment in the begining, resinous viscosity is degressive, as temperature and reaction time increase, solidify begins, viscosity increases, when achieving gel to nod, viscosity mushroom, this kind of viscosity - temperature - the composition that the appearance of time-speed-distance curve relies on reaction system, for example, agent of resinous type, filling, solidify, accelerant and fiber. Similar and as OK as this the viscosity time-speed-distance curve that gets is in fixed temperature falling (6-5 seeing a picture) . Graph 6-13 is curve of solidify of isotherm of B phase epoxy resin, can see, in process of solidify of whole B phase, systematic viscosity is reaction time (kinetic equation) with temperature (Arrhenius equation) a successive function, namely

If isothermal solidify undertakes below fixed temperature, so the kinetic reaction that we can study solidify process is medium. To isothermal solidify, to type (6-20) take logarithm to get:

If with Ln η (T, t) constructive to T for all the time line (6-10 seeing a picture) . Can see from inside graph 6-10, the time dependence of the viscosity in isothermal solidify process. Ι NK E