Pyromellitic Dianhydride
| Items | Control Standard |
|---|---|
| Appearance | White crystalline powder |
| Assay, % | ≥ 99.5 |
| Trimellitic acid, % | ≤ 0.2 |
| Melting point, ℃ | 286.0-287.5 |
| Free acid content, % | ≤ 0.5 |
| Oil insoluble matter, ppm | ≤ 15 |
| Color absorbance (in MeOH) | ≤ 25.0 |
| Acetone residue, ppm | Info. (1500max) |
| Halide ion, ppm | ≤ 5.0 |
| Sieving ＞500µm | ≤ 5.0 |
| ＞80µm | ≥ 95.0 |
| Metal ion, ppm | |
| Ni, Co, Mn, Sn, Zn, Al, Si | ≤ 1.0 |
| Cr, K, Na, Cu, Fe, Ca | ≤ 2.0 |
| Total Metals | ≤ 20.0 |
Description:
Pyromellitic Dianhydride, commonly referred to as PMDA, is a chemical compound with a unique molecular structure that consists of a benzene ring with four carboxylic acid groups attached to it. It is classified as an aromatic anhydride due to its anhydride functional groups. The compound is often used in various industrial applications, primarily as a crosslinking agent and a curing agent.
Key characteristics and uses of Pyromellitic Dianhydride include:
Crosslinking Agent, Curing Agent, Thermal Stability, Flame Retardancy, etc.
Application:
- Epoxy Resins and Composites: PMDA is commonly used as a crosslinking agent and curing agent for epoxy resins. It improves the mechanical strength, thermal stability, and chemical resistance of epoxy-based materials. These enhanced properties make PMDA-containing epoxy resins suitable for a wide range of applications, including coatings, adhesives, laminates, and composite materials used in aerospace, automotive, and construction industries.
- Polymer Modification: PMDA is used to modify the properties of polymers. It can be incorporated into polymer formulations to enhance thermal stability, flame retardancy, and overall mechanical performance. This makes it valuable for producing high-performance plastics, rubber, and other polymer-based products.
- Coatings and Paints: The compound is utilized in the formulation of coatings and paints to improve adhesion, chemical resistance, and durability. PMDA-containing coatings find applications in industrial equipment, automotive components, and architectural surfaces.
- Electronic and Electrical Components: PMDA is used to enhance the properties of insulating materials, encapsulants, and coatings in the electronics and electrical industries. Its ability to improve thermal conductivity and mechanical strength makes it valuable for producing reliable and long-lasting electronic components.
- Flame Retardant Materials: PMDA’s flame retardant properties make it suitable for use in materials that require enhanced fire resistance. It can be incorporated into polymers, textiles, and other materials to reduce flammability and improve safety in applications such as furnishings, textiles, and construction materials.
- Adhesives and Sealants: PMDA is employed in the formulation of high-performance adhesives and sealants used in demanding applications. Its crosslinking properties contribute to improved adhesion and durability in bonding applications.
Pyromellitic Dianhydride-CAS-No：89-32-7-ZXCHEM Group packing
Pyromellitic Dianhydride-CAS-No：89-32-7-ZXCHEM Group packing
Q: How to Get Sample of Pyromellitic Dianhydride?
A: ample within 500g could be sent for free once buyer’s DHL account is advised for freight collect or courier cost is paid. The courier cost could be deducted when bulk order is placed.
Q: What is Lead Time of Cas No: 89-32-7?
A: Generally, cargo could be loaded on ship in about two weeks after the date of receiving prepayment or L/C. Sometimes one week earlier or later.
Q: How about the Pyromellitic Dianhydride of ZXCHEM?
Title: Exploring the Versatility and Applications of Pyromellitic Dianhydride
Introduction: Pyromellitic Dianhydride (PMDA), with its unique chemical properties and versatile applications, has become an integral component in various industries. This article delves into the uses, properties, synthesis, and potential hazards of PMDA, shedding light on its significance in modern manufacturing and research.
Pyromellitic Dianhydride Uses and Applications: PMDA finds application in a wide range of industries, making it a valuable compound in modern materials science. Its primary use lies in the production of high-performance polymers and resins. PMDA is a key ingredient in the synthesis of polyimides, which are renowned for their exceptional thermal stability, mechanical strength, and electrical insulation properties. These polyimides are employed in the aerospace, electronics, and automotive sectors, contributing to the development of advanced materials for demanding applications.
Properties and Structure: PMDA boasts a distinctive chemical structure, featuring four anhydride groups attached to a central aromatic core. This molecular arrangement grants PMDA its remarkable thermal stability and resistance to various chemical environments. The compound’s rigid structure also plays a pivotal role in enhancing the mechanical properties of the materials it’s incorporated into.
Synthesis of Pyromellitic Dianhydride: The synthesis of PMDA involves multi-step reactions that often start with the oxidation of a precursor compound, such as benzene or naphthalene, to form the intermediate compound known as pyromellitic acid. Subsequent dehydration and decarboxylation steps yield PMDA in its final form. Careful control of reaction conditions and purification processes ensures the production of high-purity PMDA suitable for a wide array of applications.
Potential Hazards and Safety Considerations: While PMDA offers numerous advantages, it’s important to acknowledge potential hazards associated with its handling. As with many chemical compounds, PMDA poses inhalation and skin contact risks during production and processing. Adequate personal protective equipment, proper ventilation, and adherence to safety protocols are crucial to mitigate these risks effectively.
Future Prospects and Research: As industries continue to seek innovative materials with enhanced performance characteristics, PMDA remains a subject of ongoing research. Scientists are exploring novel applications and modifications of PMDA-based materials to further expand their utility. The potential for PMDA to contribute to advancements in areas such as flexible electronics, biocompatible materials, and energy storage underscores its importance in shaping future technologies.
Conclusion: Pyromellitic Dianhydride stands as a testament to the remarkable possibilities that arise from the intricate interplay between chemical structure and applications. Its role in producing high-performance materials has solidified its importance in modern manufacturing, and ongoing research continues to uncover new ways to harness its potential. With its diverse applications and unique properties, PMDA exemplifies the dynamic nature of materials science and its contributions to technological advancement.
