The best curing condition of the hottest epoxy res

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The best curing conditions of epoxy resin curing agent

actually have different uses and different requirements for properties. The best dosage given to the highest value of HDT does not necessarily make other performances reach the highest value. For example, the requirement for thermal shock strength is Jinmin new material: the amount of epoxy curing agent is reduced from the optimal amount, and the crosslinking density is reduced, resulting in the decline of HDT, but the thermal shock strength is increased. The best curing condition is to make the curing reaction complete

what is incomplete curing reaction? Under non optimal curing conditions (such as room temperature), when the complex reaches the vitrified state, due to the inhibition of the micro Brownian motion of the chain segment, the reaction rate stays at a low level, and the reaction degree is very low. This is the incomplete curing reaction, which draws on the strengths of others. When the liquid bisphenol A epoxy resin is cured with deta, the reaction degree shall not exceed 65%; Low molecular weight polyamide can be used in a variety of environments and different occasions. When it is cured, it does not exceed 40%. Because it is practical with such a low reaction rate, the change of the addition amount within a certain range has little effect on the properties of the cured product (especially when curing with low molecular weight polyamide), which is the best use. The monthly export amount is 0 The reason for the wide range of fluctuations between us $300million

in order to achieve a fully cured state, it is necessary to use a higher temperature than the system TG for post curing. For example, the cured products of aromatic polyamines must be post cured at high temperature in order to cure completely because of their high crosslinking density and TG

under the condition of incomplete curing, the various properties of the cured product will not be brought into full play, while the general performance data of the cured product are mostly the various data measured after complete curing through post curing

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