Polyphthalamide is an aromatic, semi-crystalline polyamide. As compared to nylon6/6, a polyphthalamide is stiffer, stronger, higher thermal capabilities, and it is less sensitive to wetness. However, it has higher creep resistance and significant chemical properties. Due to its excellent electrical, thermal, and physical properties, polyphthalamide resins are mostly suitable for a huge number of applications. Unlike other resins, PPA can resist several infrared soldering environments. It is an aromatic polyamide which can outperform standard polyamides with huge stiffness and strength at significant temperatures, higher resistance to a large range of chemicals, and higher retention of che

Polyphthalamide is an aromatic, semi-crystalline polyamide. As compared to nylon6/6, a polyphthalamide is stiffer, stronger, higher thermal capabilities, and it is less sensitive to wetness. However, it has higher creep resistance and significant chemical properties. Due to its excellent electrical, thermal, and physical properties, polyphthalamide resins are mostly suitable for a huge number of applications. Unlike other resins, PPA can resist several infrared soldering environments. It is an aromatic polyamide which can outperform standard polyamides with huge stiffness and strength at significant temperatures, higher resistance to a large range of chemicals, and higher retention of chemical properties in humid environments.

High-performance polyphthalamide or PPA is a collection of several thermoplastic synthetic resins related to the polyamide structure. On the other hand, the replacement of aliphatic acids with aromatic diacids in case of polymer backbone raises the glass transition temperature, melting point, stiffness, and chemical resistance. In addition, polyphthalamide based resins can be molded into particles to exchange metal in applications which require high-temperature resistance like automotive components, and the electrical connectors which require high temperature and many others.

Structure of Polyphthalamide

The diamines in the polyphthalamides are aliphatic. However, PA6T homopolymer can be melt at the temperature of 371 °C, which turns into intractable. On the other hand, to make the polymer more usable, there is need to reduce the melting point, and it can be only achieved practically with the copolymerizing 6T or with help of higher diamine like 9 to 12 carbon atoms. In addition, PA 6T/66, PA6T/6I, and PA 6T/”DT” are the three copolymers which have found for commercial success. However, if near around 55 percent of the acidic part of polyamide is created with the IPA, so we can say that copolymer is shapeless.

The glass transition temperature of the polyphthalamide rises according to the rising TPA. In addition, the crystallinity will help with mechanical and chemical resistance properties below the melting point as well as above the temperature of the glass transition. However, amorphous polymers are better in transparency and warpage. Just similar to aliphatic nylons, a polyphthalamides could be modified in reinforcing agents like tougheners, glass fiber, and stabilizers. Formulations of some special properties of polyamide have been shaped such as, resins who has the capacity to link directly to elastomers for the creation of plastic-rubber and has support for straight contact with the food and drinking water.

Polyamide Blends

The combination of polyphthalamide and aliphatic polyamides to reduce the temperature of glass transition and lower the melting point, which significantly makes such polyphthalamide molds easily to process when it can be evaluated with the higher softening and melting PPAs. However, there is a huge investigation related to polyolefin or PA blends, some of them have been published related to the properties of polyolefin or PPA blends. This is because of the significantly high processing temperature required for polyphthalamide based resins as compared to the polyolefins temperature stability.  On the other hand, PA/polyolefin/PPA blends exhibit an excellent balance of strength, ductility, impact, thermal performance, and stiffness which indicates that such kind of chemical material must-have commercial utility.

Some Major Applications of Polyamide

Resins which are dependent on PPA are kind of injections which are molded into some specific parts then it can be used in the huge number of significant applications. However, in automotive industries it can use in coolant and fuel lines, motor bobbin parts, water heater manifolds, fuel cut-off valves, pump wear rings, fuel line connectors, air coolers, thermostat housing LED headlights, and coolant pumps. In terms of the electronics industry, a polyphthalamide can be used in the SMD parts which can mold from PPA with the help of lead-free soldering procedure. Polyphthalamides can be also useful in USB-Connectors, cables & wires protection, and LED mounts. In addition, some other applications of polyphthalamide based resins may comprise supply lines and gas pipes for the oil industry, in the medical industry such as personal care, tubing for catheters, hairbrushes as well as toothbrush bristles. PPAs can be also used in the sports industry such as sports equipment, bearing and bushing pads in engines of aircraft, and showers valve bodies.

Lifecycle Impact of Polyphthalamide

Polyphthalamides are fully recyclable in terms of remolding properties, and as a compression polymer with depolymerization. On the other hand, commercial recycling needs the cleaning and processing, as well as the cost of logistics to be lower the cost as compared to the virgin polymer.

Advantages of polyphthalamide

•          Chemical resistance

•          Heat Resistance

•          Cost

•          High Physical Properties

•          Significantly Low Moisture Absorption

Limitations of Polyphthalamide

•          In requires good drying equipment

•          Not innately flame retardant

•          High processing temperature

Properties of Polyphthalamide

•          It offers high chemical resistance

•          Higher stiffness and strength at eminent temperature

•          Dimensional stability

•          Fatigue and creep resistance

•          Sensitive for moisture absorption

•          Warpage