Polyimide film with pyrimidine side group and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A polyimide film and polyimide technology, applied in the field of polyimide film with pyrimidine side groups and its preparation, can solve the problems of high molecular chain rigidity, low elongation at break, poor flexibility, etc. Achieve high modulus, reduce packing density and improve elongation at break
Active Publication Date: 2018-07-03
JIANGHAN UNIVERSITY
View PDF6 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] However, among the polyimide materials that have been reported, the polyimide polymer used as a flexible display substrate material has excellent thermal stability and tensile strength, but its molecular chain rigidity makes the material brittle and fractures. Low elongation, poor flexibility
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0043] At -15°C, p-phenylenediamine (10.8g, 0.1mol) and N-(2-pyrimidinyl)-2-(3-aminophenyl)-5-aminoindole (15.05g, 0.05mol) Dissolve the mixed diamine in 180g of strictly dry NMP, protect it under nitrogen, stir it mechanically until it is completely dissolved, and then add aromatic dianhydride {(aromatic dianhydride is a commercially available product), and the aromatic dianhydride is selected from 1, 2, 4 , 5-Pyromellitic dianhydride, the addition amount is (32.7g, 0.15mol) Continue stirring for 18h under the protection of nitrogen to obtain a polyamic acid solution.
[0044] After decompressing the above polyamic acid solution to eliminate air bubbles, apply it on clean glass with a film thickness of 150 microns, put it in an oven, and heat it to cure at 80°C for 360 minutes, 170°C for 60 minutes, and 230°C for 60 minutes. Cured at 300°C for 120 minutes, evaporated to remove the solvent, then cooled down to room temperature naturally, and peeled off to obtain a film.
Embodiment 2
[0045] Embodiment 2: In the implementation process, except that the aromatic dianhydride is selected from 3,3'-4,4'-biphenyl dianhydride, and its addition amount is different (44.1g, 0.15mol), the rest are the same as in Example 1.
Embodiment 3
[0046] Embodiment 3: In the implementation process, except that the aromatic dianhydride is selected from 3,3'-4,4'-diphenyl ether dianhydride, and its addition amount is different (46.5g, 0.15mol), the rest are the same as in Example 1.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
glass transition temperature
aaaaa
aaaaa
elongation at break
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a polyimide film with pyrimidine side groups and a preparation method thereof. The preparation method comprises the following steps: 1) under the protection of nitrogen or argon, aromatic diamine and N-pyrimidine-containing indium The diamine of the azole structure is mixed into a mixed diamine, and the mixed diamine is dissolved in a polar solvent and completely dissolved at -15°C -100°C to obtain a mixed solution; 2) Add an aromatic dianhydride to the mixed solution to maintain The temperature of the reaction system is reacted at -15°C-100°C for 5-24h to obtain a polyamic acid solution; 3) cast or scrape the polyamic acid solution on a glass substrate to form a film, heat imidization by temperature programming, and wait for the temperature to rise After the program is completed, the temperature is naturally lowered to room temperature, and the polyimide film with pyrimidine side groups is obtained after peeling off. The present invention introduces pyrimidine rings into polyimide, reduces molecular chain packing density, improves material flexibility, and the prepared polyimide material containing pyrimidine side groups has high heat resistance, dimensional stability and high flexibility, and can be used As a flexible display substrate material.
Description
technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyimide film with pyrimidine side groups and a preparation method thereof. Background technique [0002] Polyimide is a high-performance polymer material with excellent chemical stability, thermal stability and high mechanical strength, and has been widely used in aerospace, microelectronics and chemical industries. In recent years, the research on the use of polyimide thin films as flexible display substrate materials has attracted much attention. The substrate material used for top-emitting flexible displays does not require colorless and transparent, but the high-temperature display process requires polyimide to be extremely high-temperature resistant, and the substrate is required to be flexible and resistant to bending. [0003] However, among the polyimide materials that have been reported, the polyimide polymer used as a flexible display substrate material h...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more