Humidity-sensitive polyimide, preparation and applications thereof

A technology of moisture-sensitive polyimide and maleimide-based polyimide, which is applied in the direction of fixed capacitor parts, etc., can solve problems such as non-moisture-sensitive polyimide films, and achieve good application prospects , simple operation, easy molecular weight effect

Inactive Publication Date: 2012-05-02
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] But none of the above are polyimid

Method used

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  • Humidity-sensitive polyimide, preparation and applications thereof
  • Humidity-sensitive polyimide, preparation and applications thereof
  • Humidity-sensitive polyimide, preparation and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Put 44.1 g (0.1 mol) of 2,2-bis[4-(2,4-diaminophenoxy)phenyl]propane and 400 ml of N-methyl-2-pyrrolidone strong polar aprotic organic solvent In the reactor, at room temperature, after stirring and dissolving completely, add 19.6 g (0.2 mol) of maleic anhydride solid powder, stir at room temperature until it is completely dissolved, continue to stir and react for 0.5 hours, add 31.0 g (0.1 mol) 3,3' ,4,4'-Tetracarboxydiphenyl ether dianhydride, stirred and reacted at 0℃-5℃ for 2 hours to obtain a homogeneous transparent viscous resin solution; add 200ml of toluene azeotropic dehydrating agent, azeotropic reflux water separation After stirring and reacting for 6-8 hours, add 4000 ml of ethanol, stir at high speed to precipitate solid powder, filter, wash 2-3 times with acetone, and dry in vacuum to obtain 86.2 g of maleimide-based polyimide powder (denoted as A component), the yield is 98.5%.

Embodiment 2

[0053] Put 20.0 g (0.1 mol) of 4,4'-diaminodiphenyl ether and 400 ml of N-methyl-2-pyrrolidone strong polar aprotic organic solvent into the reaction kettle, stir and dissolve at room temperature, then add 58.8g (0.2mol) 3,3',4,4'-tetracarboxybiphthalic anhydride solid powder, stirred for 0.5 hour at 0℃-5℃, added 21.6g (0.2mol) p-phenylenediamine powder, continue After stirring and reacting for 1 hour, a homogeneous transparent solution is obtained; adding 200 ml of toluene azeotropic dehydrating agent, nitrogen atmosphere, azeotropic reflux water separation, stirring for 5 hours, adding 4000 ml of ethanol, stirring at high speed, precipitation of solid powder, filtering, washing , Vacuum drying, 92.6 grams of amino-terminated imide oligomer powder (denoted as C component) was obtained, and the yield was 95.7%.

Embodiment 3

[0055] Take 15.0 grams of component A and 85.0 grams of chloroform, put them in a three-necked flask, stir to dissolve at room temperature, and obtain a solution of component A with a solid content of 15%; take 15.0 grams of component B (4,4'-bismaleyl Imino diphenylmethane) and 85.0 grams of chloroform were put into a three-necked flask, stirred and dissolved at room temperature to obtain a B component solution with a solid content of 15%; 15.0 grams of C component and 85.0 grams of chloroform were put into the three-necked flask In, stir and dissolve at room temperature to obtain a C component solution with a solid content of 15%;

[0056] Take 20.0 grams of component A solution, 2.0 grams of component B solution, and 8.0 grams of component C solution into a three-necked flask and stir evenly at room temperature to obtain a moisture-sensitive polyimide solution with a solid content of 15%, denoted as HSPI15 -31.

[0057] Take 20.0 grams of component A solution, 4.0 grams of comp...

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Abstract

The invention relates to humidity-sensitive polyimide, preparation and applications thereof. The humidity-sensitive polyimide comprises maleimide-based polyimide, bismaleimide and ammonia end-group imide oligomer with the weight ratio being 1:(0.1-0.2):(0.4-0.8), and an organic solvent. The preparation method comprises the following steps of preparing the maleimide-based polyimide and the ammonia end-group imide oligomer respectively, and carrying out copolymerization with the bismaleimide to obtain the humidity-sensitive polyimide. The molecular weight of the adopted material resin is easy to control, the molecular structure of the adopted material resin is also easy to adjust, thereby being beneficial to preparing the function material of the humidity-sensitive polyimide with ideal performance; and the invention has the advantages of simple process, low cost, environmentally-friendliness, capability of finishing the preparation process in universal equipment and suitability for industrial production.

Description

Technical field [0001] The invention belongs to the field of polyimide resin and its preparation and application, and particularly relates to a moisture-sensitive polyimide and its preparation and application. Background technique [0002] In the fields of meteorology, environmental protection, national defense, aviation, aerospace, navigation, industry, agriculture, medical, electronic and microelectronics, it is often necessary to measure and control the environmental humidity. The measurement of humidity is much more complicated than the measurement of temperature. This is mainly because temperature is an independent measurement, and the measurement of humidity cannot be measured due to the partial pressure of water vapor in the air. Therefore, it has to be converted into The humidity value can be obtained by measuring the secondary parameters related to humidity and then performing conversion. [0003] There are three main traditional humidity measurement tools, namely telesco...

Claims

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Application Information

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IPC IPC(8): C08G73/12H01G4/002
Inventor 虞鑫海许梅芳陈芳
Owner DONGHUA UNIV
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