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Easy to produce crystallization conditions
1, epoxy resin is located in the environment of 10 degrees C, crystallization speed is the fastest.
2, the lower the chlorine content of the resin, the narrower the molecular weight distribution, the higher the purity, the easier it is to crystallize.
3, some thinners are particularly easy to crystallize epoxy resins, such as BGE
.
4, there are some chemicals that induce epoxy crystallization, such as BPA.
5, dust may also become the core of epoxy crystallization, induced crystallization.
6, fillers may also be able to accelerate the crystallization of epoxy resin.
above are a variety of easy to cause epoxy crystallization of the condition, part of epoxy resin because of the composition of the relationship, easy to appear granular, or even the whole tank hardened. The epoxy resin at this time is not broken, but produces crystallization.
Knowledge Development
1, epoxy resin is sensitive to temperature, in extremely cold environment or temperature fluctuations, it is very easy to occur liquid to solid state conversion, that is, the crystallization of epoxy resin, which is a natural physical phenomenon.
2, crystallization treatment: epoxy adhesive crystallization, also similar to the change of water ice, heating (heating), ice will melt back into water. With this principle in place, we can usually use a water bath, a heater, or a solar lamp to heat it.
3, epoxy crystallization is a physical reaction, not a chemical reaction, so it does not affect the performance of the adhesive.
.