Model of epoxy resin structure - shed denaturation - processability - the relati

Colophony of hot solid sex has very large proportion in synthetic resin, accordingly, be necessary to shed denaturation to undertake discussion technically character to its.

Colophony of hot solid sex is in processing process, its shed denaturation to be able to happen character very about-face. For example epoxy resin, their initiative viscosity is lesser, but the addition as response rate, viscosity rises quickly, in gel dot, viscosity and stretch model volume rise substantially inside very short time; After gel is nodded, sol drop off of the system, gel is added gradually much, what viscosity increases so is fast, so that cannot flow very quickly; Obtain vitreous condition via sufficient cross-linking finally, right now modular quantity of the system is as high as 10³MPa.

The change that understands these shedding to become characteristic is all in all to the processing technology of epoxy resin. For example, epoxy resin and fibre glass are compound goods, in macerate phase, is the viscosity of epoxy resin how old does ability soak fibre glass better? When B phase, epoxy resin, is fluidity of the resinous in fibre glass prefabricated component how old ability makes shape easily? In lamination phase, how to control temperature and pressure, is colophony fluidity how old does ability prevent colophony nothing more than excessive and is goods had again disloyal? More or less can solidify time just make end item function optimal? Again for example, epoxy resin of fill of silicon small pink makes fill seal makings, the fill of silicon small pink is measured, agent of epoxy resin, solidify, accelerant, coupling agent the choice that wait, how old to adding the viscosity that writes epoxy resin system to have influence? Choose much higher temperature to undertake fill is sealed?

Change through understanding resinous of hot solid sex to flow the model can answer afore-mentioned a lot of questions. This kind of model is to build what go up in foundation of molecular structure parameter, accordingly, can serve as determine the strong analytic step of structure of colophony of hot solid sex. Shed variable to differentiate resinous gel to nod according to can be being used, explanatory element quantity, change degree and cross-linking density.

The purpose of this section is system of cross-linking of discussion epoxy resin, how to get. To shed variable to occupy, how to analyse these to shed variable to occupy, build these to shed variable to occupy the relation with molecular structure parameter, understand the significance in be machined actually.

One, structure and stream change the relation between

With thermoplastic colophony is different, colophony of hot solid sex (be like epoxy resin) initiative viscosity is very small, when joining solidify agent and accelerant, below constant temperature, chemical reaction began to appear, bring about chemical cross-linking of the element and colophony solidify subsequently. Because this heats up solid sex resinous to flow,change learning the job is to want to know to heat up viscosity of flow of solid sex resinous not only, and a series of flow behavior before wanting to know to be formed in goods.