What is the Tg of polyimide?
The comparatively rigid structure of polyimides provides high glass transition temperature (Tg > 300°C) and imparts good mechanical strength and high modulus.
What is the difference between polyamide and polyimide?
The major difference between polyamide and polyimide is in their chemical structures; polyamide has the amide (-CONH-) linkages in their polymer backbone, while polyimide has imide group (-CO-N-OC-) in their polymer backbone.
What is aromatic polyimide?
Aromatic polyimides are a special group of engineering organic materials, which are classified as high performance polymers, because of their excellent thermal, mechanical and chemical properties .
Is polyimide UV resistant?
UV radiation resistant polyimide based composites reinforced with nanostructured titanate particles: preparation and properties. Ultraviolet (UV) exposure is one of the most deleterious threats to polymers. UV light may alter chemical bonds, leading to discoloration of the polymer and even degradation of its properties …
How strong is polyimide?
Kapton HN general-purpose polyimide film
|Ultimate Tensile Strength . at 392°F, Mpa||139||139|
|Ultimate Elongation at 73°F, %||72||82|
|Ultimate Elongation at 392°F, %||83||83|
How expensive is polyimide?
Compare with similar items
|This item 1 Mil Kapton Tape (Polyimide) – 1″ x 36 yds||Tapes Master 1 Mil Kapton Tape (Polyimide Tape), 1 1/2″ x 36 yds|
|Customer Rating||4.8 out of 5 stars (241)||5.0 out of 5 stars (10)|
|Sold By||Lucent Path||Lucent Path|
Is Kapton a polyimide?
Kapton tape is a type of polyimide tape developed specifically by DuPont. Like other polyimide tapes, Kapton tape is used for insulation, heat control, and chemical resistance.
Does polyimide absorb water?
The equilibrium moisture content of most polyimide is low, that is, <1%. The percentage of water absorption of polyimides after 24 hours of immersion at room temperature is 0.7%, which is relatively higher than that for epoxies or silicones.
Does Kapton block UV light?
One of the key features of Kapton tape, is that it blocks UV light. We need very precise IV blocking, and this tape gives us the ability to do just that.
What makes a polyimide a high performance polymer?
Polyimides (PI) are high-performance polymers of imide monomers which contain two acyl groups (C=O) bonded to nitrogen (N). These polymers are known for their high temperature performance in the 400-500°C range as well as chemical resistance.
What can polyimide be used for in medical applications?
Structure of poly-oxydiphenylene-pyromellitimide, “Kapton”. Polyimide is used to coat optical fibers for medical or high temperature applications. An additional use of polyimide resin is as an insulating and passivation layer in the manufacture of Integrated circuits and MEMS chips.
What are the advantages and disadvantages of polyimide plastic?
Strengths and Limitations of Polyimides 1 High mechanical performance 2 Superior temperature adaptability 3 Excellent tensile and compressive strength 4 Outstanding chemical resistance 5 Transparency in many microwave applications 6 Radiation resistance 7 Superior bearing and wear properties
How are polyimide composites used in thermal processing?
PI composites not only add value in thermal servicing and mechanical properties, but also enhance processing methods and quality. Some carbon fiber-reinforced thermoset polyimides-based composites have demonstrated the suitability for different processing methods such as autoclave and RTM and excellent combined properties for 370°C applications.