Flexible Transparent Polyimide Material High Purity 99.9% Electronic Grade 6FDA Use

High purity 99.9% Electronic grade 6FDA use for high-performance flexible transparent polyimide material

4,4′-(Hexafluoroisopropylidene)diphthalic anhydride (6FDA) is an aromatic organofluorine compound and the dianhydride of 4,4'-(hexafluorisopropylidene)bisphthalic acid (name derived from phthalic acid).

4,4'-(hexafluoroisopropylidene)diphthalic anhydride be used for the preparation of a polyimide material.

Description of PI monomer 6FDA

Hexafluoro dianhydride (i.e. 4,4 '- (hexafluoroisopropylidene) di phthalic anhydride, 6FDA)) is one of the six most widely used dianhydride monomers, and is also the most widely used dianhydride monomer in colorless transparent polyimides. The glass transition temperature of polyimide synthesized from hexafluorodianhydride is usually above 300 ° C, and the mechanical and electrical properties are well balanced. So far, it is still the most representative fluorinated polyimide.

Specification of 6FDA

Property of 6FDA

1, Low Dk&Df.

2, High transparency and controllable refractive index.

3, Excellent chemical and thermal stability.

4, Excellent lubricity and radiation-resistant.

5, fluorinated monomer

Advantages of 6FDA

1.1 Low dielectric properties
The dielectric constant of the traditional fluorine-free Kapton film is as high as 3.9 at 1 kHz. fluorine element has a low electronic polarisation rate, and fluorine-containing groups such as -CF3 have a large free volume, which effectively reduces the stacking efficiency of the molecules, increases the intermolecular spacing, and thus weakens the intermolecular interaction force, and the introduction of fluorine-containing groups into PI can reduce the dielectric constant (FPI dielectric constant ≤ 3) of PI materials, and has good stability over a wide range of temperature and frequency. The introduction of fluorine-containing groups into PI can reduce the dielectric constant of PI materials (FPI dielectric constant ≤ 3), and has good stability in a wide range of temperature and frequency.

1.2 Highly transparent properties
Conventional aromatic PIs form charge transfer complexes (CTCs) due to inter- and intramolecular charge transfer complexation, and these complexes absorb light, resulting in PI films that appear yellow or brown. However, elemental fluorine, due to its strong electronegativity, can effectively cut off PI electron cloud conjugation and inhibit the formation of CTCs. As a result, the resulting FPIs are usually light-coloured or colourless and can maintain high transparency while maintaining high thermal stability.

1.3 Excellent gas separation performance
Due to the special characteristics of fluorine atoms in fluorine-containing PI, fluorine atoms between different molecular chain segments will be attracted to each other, resulting in the polymer chain intertwining and curling. This structural feature restricts the close stacking of molecular chains, thus increasing the free volume fraction (FFV). At the same time, the polymer molecular chains composed of fluorine atoms have a greater rigidity, which allows fluorinated PIs to enhance gas permeability while still maintaining good selectivity.

1.4 Easy solubility properties
Ordinary polyimide due to the close intermolecular stacking, making it difficult for polar solvents such as DMAC, DMF, etc. to enter the interior of its molecular chain, resulting in poor solubility or even insoluble. However, fluorine-containing polyimide through the introduction of fluorine-containing groups, increasing the spacing of the molecular chain, reducing the intermolecular forces, thus limiting the close stacking of the molecular chain. This makes it easier for solvent molecules to enter between the molecules and significantly improves the solubility of fluoropolyimide.

1.5 Low hygroscopicity properties
The low surface of the fluorine atom makes it strongly hydrophobic, which reduces the moisture absorption rate of the film.

FAQ

Q1: What is your regular lead time for sample and official order?

A1: Sample lead time 5-7 days. Official order lead time 14-21 days.

Q2: What is your MOQ?

A2: MOQ usually is 1kg.

Q3: How you control product quality?

A3: From raw material inspection, dupro inspection to final product inspection are executed strictly.

Q4: What is your warranty policy?

A4: We will send you a new batch if there is any quality issue during warranty time

Q5: Do you refund if customer receive defective product and do not accept replacement?

A5: Yes

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