金城娱乐彩票的固化温度和耐热性-天津三川恒泰淤泥固化处理/吹填土地基处理公司

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          • 您现在的位置:首页 >金城娱乐 >> 金城娱乐彩票的固化温度和耐热性
            [来源:www.hardwickmg.com] [作者:淤泥固化] [日期:19-03-07]

            金城娱乐彩票的固化温度和耐热性
            Curing temperature and heat resistance of curing agent
            各种金城娱乐彩票的固化温度各不相同,固化物的耐热性也有很大不同。一般地说,使用固化温度高的金城娱乐彩票可以得到耐热优良的固化物。对于加成聚合型金城娱乐彩票,固化温度和耐热性按下列顺序提高:
            The curing temperature of various curing agents varies, and the heat resistance of cured products varies greatly. Generally speaking, curing agents with high curing temperature can be used to obtain cured materials with good heat resistance. For addition polymeric curing agents, curing temperature and heat resistance are increased in the following order:
            脂肪族多胺<脂环族多胺<芳香族多胺<酚醛<酸酐
            Aliphatic polyamines < alicyclic polyamines < aromatic polyamines < phenolic < anhydride
            催化加聚型金城娱乐彩票的耐热性大体处于芳香多胺水平。阴离子聚合型(叔胺和咪唑化古物)、阳离子聚合型(BF3络合物)的耐热性基本上相同,这主要是虽然起始的反应机理不同,但最终都形成醚键结合的网状结构。
            The heat resistance of catalytic additive curing agent is generally at the level of aromatic polyamines. Anionic polymerization (tertiary amines and imidazolium compounds) and cationic polymerization (BF3 complexes) have basically the same heat resistance, which is mainly due to the formation of ether bonded network structures, although the initial reaction mechanism is different.
            固化反应属于化学反应,受固化温度影响很大,温度增高,反应速度加快,凝胶时间变短;凝胶时间的对数值随固化温度上升大体呈直线下降趋势。但固化温度过高,常使固化物性能下降,所以存在固化温度的上限;必须选择使固化速度和固化物性能折中的温度,作为合适的固化温度。按固化温度可把金城娱乐彩票分为四类:低温金城娱乐彩票固化温度在室温以下;室温金城娱乐彩票固化温度为室温~50℃;中温金城娱乐彩票为50~100℃;高温金城娱乐彩票固化温度在100℃以上。属于低温固化型的金城娱乐彩票品种很少,有聚琉醇型、多异氰酸酯型等;国内研制投产的T-31改性胺、YH-82改性胺均可在0℃以下固化。属于室温固化型的种类很多:脂肪族多胺、脂环族多胺;低分子聚酰胺以及改性芳胺等。属于中温固化型的有一部分脂环族多胺、叔胺、眯唑类以及三氟化硼络合物等。属于高温型金城娱乐彩票的有芳香族多胺、酸酐、甲阶酚醛树脂、氨基树脂、双氰胺以及酰肼等。
            The curing reaction belongs to the chemical reaction, which is greatly influenced by the curing temperature, the temperature is increased, the reaction speed is accelerated, the gel time is shorter, and the gelation time value generally decreases linearly with the increase of curing temperature. However, the curing temperature is too high, which often leads to the decrease of the curing properties, so there is an upper limit of the curing temperature. It is necessary to choose a suitable curing temperature to compromise the curing speed with the curing properties. According to curing temperature, curing agents can be divided into four categories: low temperature curing agent curing temperature below room temperature; room temperature curing agent curing temperature between room temperature and 50 C; medium temperature curing agent 50-100 C; high temperature curing agent curing temperature above 100 C. There are few kinds of curing agents which belong to low temperature curing type, such as polyisocyanate type and poly-ryl alcohol type. T-31 modified amine and YH-82 modified amine developed and put into production in China can be cured below 0 C. There are many kinds of room temperature curing: aliphatic polyamines, alicyclic polyamines, low molecular weight polyamides and modified aromatic amines. Some alicyclic polyamines, tertiary amines, orbital azoles and boron trifluoride complexes belong to the moderate temperature curing type. Aromatic polyamines, anhydrides, phenolic resins, amino resins, dicyandiamides and hydrazides are high temperature curing agents.
            对于高温固化体系,固化温度一般分为两阶段,在凝胶前采用低温固化,在达到凝胶状态或比凝胶状态稍高的状态之后,再高温加热进行后固化(post-cure),相对之前段固化为预固化(pre-cure)。
            For high temperature curing system, the curing temperature is generally divided into two stages. The gel is solidified at low temperature before reaching the gel state or slightly higher than the gel state. Then the post-cure is solidified at high temperature and solidified as pre curing (pre-cure).

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