920液体聚酰亚胺树脂 920 liquid polyimide resin

There are a wide variety of polyimide resins in various forms. According to incomplete statistics, 200-300 types of dianhydride and diamine have been used to synthesize polyimide resins. As a result, thousands of polyimide have been synthesized and studied, at the same time, there are many ways to synthesize imine, so it can be selected according to various applications. This kind of flexibility is difficult for other polymer materials.

920液体聚酰亚胺树脂是先进的复合材料基体，由于具有耐高温性能和突出的电气绝缘性能，使其成为航空航天及电子电气方面应用不可替代的产品

920 liquid polyimide resin is an advanced composite matrix, because of its high temperature resistance and outstanding electrical insulation performance, so it is an irreplaceable product in aerospace and electronic and electrical applications

1.耐高温性：分解温度一般在450°左右，是聚合物中耐高温性能很好的品种之一

1. High temperature resistance: the decomposition temperature is about 450 ° , is one of the polymer high temperature resistance good varieties

2.耐低温性：可以耐极低的温度，如-269°的低温液态氮中不会发生脆裂

2. Low temperature resistance: can withstand extremely low temperature, such as -269 degrees in low temperature liquid nitrogen will not occur brittle fracture

3.机械性能：弹性模量3-4GP，纤维可达200GP

3. Mechanical Properties: elastic modulus 3-4GP, fiber up to 200GP

4.阻燃性：为自熄性聚合物，发烟率低，级别可达UL94V-0/5V

4. Flame retardant: self extinguishing polymer, low smoke rate, UL94V-0/5V grade

5.耐溶剂性：可耐一般的有机溶剂，固化物对酸碱稳定

5. Solvent Resistance: can withstand the general organic solvent, the cured product on acid and alkali stability

6.电绝缘性能：绝缘等级可达C级

6.Electrical Insulation Performance: insulation grade up to class C

7.耐辐射性能：经过大剂量的辐射后仍保持良好的电性能和机械性能

7. Radiation Resistance: after a large dose of radiation still maintain good electrical and mechanical properties

8.自润滑性：摩擦系数可低于0.02

8. Self-lubrication: the coefficient of friction may be less than 0.02

9.尺寸稳定性：在高温中尺寸稳定

9.Dimensional stability: dimensional stability at high temperatures

10.无毒性：可用来制造餐具和医用器具，承受数千次的重复使用

10. Non-toxic: can be used to make tableware and medical appliances, withstand thousands of times of repeated use

1.聚酰亚胺主要由二元酐和二元胺合成，这两种单体与众多其他杂环聚合物，如聚苯并咪唑、聚苯并噁唑、聚苯并噻唑、聚喹嘧啉及聚喹啉等的单体比较，原料来源广，合成也较容易。

1. The polyimide are mainly synthesized from binary anhydride and binary amine. These monomers are compared with many other heterocyclic polymers such as polybenzimidazole, polybenzoxazole, polybenzothiazole, polyquinoline and polyquinoline, the raw material source is broad, the synthesis is also easy.

2.聚酰亚胺由二酐和二胺在极性溶剂（如DMF、DMAc、NMP或THF／甲醇混合溶剂）中先进行低温缩聚，获得可溶的聚酰胺酸，成膜或纺丝后热至300℃左右脱水成环转变为聚酰亚胺；也能向聚酰胺酸中加人乙酐和叔胺类催化剂，进行化学脱水环化，得到聚酰亚胺溶液或粉末。二酐和二胺还能在高沸点溶剂，如酚类溶剂中加热缩聚，一步获得聚酰亚胺。此外，还能由四元酸的二元酯和二胺反应获得聚酰亚胺；也能由聚酰胺酸先转变为聚异酰亚胺，然后再热转化为聚酰亚胺。这些方式都为加工带来方便，前者称为PMR（polymerization monomer reagents）方式，能获得低黏度、高固含量的溶液，在加工时有一个具有低熔体黏度的窗口，特别适用于复合材料的制造；后者则增加了溶解性，在转化的过程中不放出低分子化合物。

2. The polyimide is obtained by polycondensation of dianhydride and diamine in polar solvents such as DMF, DMAC, NMP or thfmethanol, it can be converted into polyimide by dehydration at about 300 ° C after film formation or spinning, and can be chemically dehydrated and cycled into polyimide solution or powder by adding human acetic anhydride and tertiary amine catalysts to polyamide acid. Dianhydride and diamine can also be obtained by one-step polycondensation in high-boiling solvents, such as phenolic polyimide. In addition, polyimide can be obtained from the reaction of diesters of tetracarboxylic acids with diamines, and polyamide can be converted from polyamic acid to polyisoimide and then to polyimide by heat. The former, called the PMR (monomer polymerization reagents) method, provides a low viscosity, high solid content solution with a window of low melt viscosity during processing, particularly suitable for the manufacture of composite materials; the latter increases solubility and does not release low-molecular-weight compounds during the conversion process.

3.只要二酐（或四酸）和二胺的纯度合格，不论采用何种缩聚方式，都很容易获得足够高的分子量，加入单元酐或单元胺还方便地对分子量进行调控。

3. As long as the purity of dianhydride (or tetra-acid) and diamine is qualified, it is easy to obtain high enough molecular weight by any condensation method.

4.含有酐（或邻位二酸）端基和胺端基的低分子聚酰亚胺在真空下加热时能彼此发生反应，使分子量继续增长。

4. Low-molecular-weight polyimide containing anhydride (or ortho-dicarboxylic acid) , Tuncay Şanlı, and the amine end groups can react with each other when heated in a vacuum, allowing the molecular weight to continue to increase.

5.很容易在链端或链上引入反应基团形成活性低聚物，从而得到热固性聚酰亚胺。

5. It is easy to introduce reactive groups at the end of the chain or on the chain to form active oligomers, thus obtaining thermosetting polyimide.

6.利用聚酰胺酸中的羧基，进行酯化或成盐，引入光敏基团或长链烷基获得双亲聚合物，可得到光刻胶、杂化材料或用于LB膜的制备。

6. Photoresist, hybrid material or LB film can be prepared by esterification or salting of carboxyl group in polyamide acid, introducing photosensitive group or long chain alkyl group to get amphiphilic polymer.

7.一般合成聚酰亚胺的过程都不产生无机盐，其预聚物或聚酰亚胺的能直接用于涂膜或纺丝，无需进行繁杂的洗涤以去除会降低性能的无机盐副产物，这对于绝缘材料的制备特别有利。

7. In general, no inorganic salts are produced in the process of synthesizing polyimide. The prepolymer or polyimide can be directly used for coating or spinning without the need for complicated washing to remove inorganic by-products that would degrade the properties of the salts, this is particularly advantageous for the preparation of insulating materials.

8.作为单体的二酐和二胺在高真空下容易升华，因此能利用气相沉积法在工件上，特别是表面不平或具有尖锐边缘的器件上形成聚酰亚胺满膜。

8. As monomers, dianhydride and diamine sublimate easily under high vacuum, and thus can be used to form polyimide films on workpieces, especially on devices with uneven surfaces or sharp edges, by vapor deposition.