Electrical Conductive Plastic

Introduction of electrical conductive plastic

Electrically conductive plastic materials are functional polymer materials that are mixed with resin and conductive substances and processed using plastic processing methods. It is mainly used in electronics, integrated circuit packaging, electromagnetic wave shielding, and other fields.

To impart conductivity to a polymer, a π conjugated system must be introduced into the polymer main chain to form a polymer with overlapping π electron systems. Moreover, the regular structure of the polymer is also indispensable, and dopants are sufficient. Qualified for this task. Therefore, the first condition for a plastic material to be conductive is that it must have a conjugated π electron system, and the second condition is that it must be chemically or electrochemically doped, that is, the polymer chain is gained or lost through a redox process. electronic. With the continuous development of technology, the performance of electrical conductive plastics continues to improve, and its application prospects are becoming more and more broad.

electrical conductive plastic

Classification of electrical conductive plastic

Electrical conductive plastic materials are usually divided into two categories: structural conductive plastics and composite conductive plastics.

Structural electrical conductive plastics, also known as intrinsic conductive plastics, refer to plastics that are conductive themselves or become conductive after chemical modification. Common polymer conductive materials of this type of material mainly include conjugated polymers, such as polyacetylene, (Sr)n, linear polyphenylene, layered polymers, etc.; metal chelates, such as polyketone phthalocyanine; Charge-shifting polymer complexes, such as polycations and CQ complexes.

Composite electrical conductive plastic is a functional polymer material that is mixed with resin and conductive substances and processed using traditional plastic processing methods. In composite conductive plastics, the plastic itself is not conductive and only acts as an adhesive. Conductivity is obtained by mixing conductive substances such as carbon black, metal powder, etc. These conductive substances are called conductive fillers, with silver powder and carbon black being the most commonly used. Composite electrical conductive plastics are easy to prepare and have strong practicability. They are often used in switches, pressure-sensitive components, connectors, antistatic materials, electromagnetic shielding materials, resistors, and solar cells.

 

Common electrical conductive plastic materials on the market include:

  1. Polystyrene plastic (PS): an electrically conductive plastic widely used in the electronics industry, such as cards, optical fibers, conductive plates, and other fields.
  2. Polypropylene plastic (PP): It is an extremely high-performance electrical conductive material that can withstand high temperatures and high pressures and has good chemical resistance. It is often used in high-demand fields such as electronic products, chips, and semiconductors.
  3. Polycarbonate plastic (PC): It has good mechanical strength and good heat resistance, and is widely used in fields such as LED TVs, computer screens, cameras, and mobile phone displays.
  4. Conductive PVC: It has excellent conductive properties, crystal properties and mechanical strength, good stability, and processability, and is often used in electronic fields such as LCDs, wearable devices, and smartphones.
  5. Polytetrafluoroethylene plastic (PTFE): a material that is conductive and anti-corrosion, has high chemical resistance and heat resistance, and also has excellent mechanical properties. It is used in semiconductors, chemicals, automobiles, medical equipment, and machinery It is widely used in parts and other fields.
  6. Carbon fiber reinforced plastic (CFRP): A new material composed of carbon fiber and resin. It has excellent mechanical strength and corrosion resistance, as well as good electrical conductivity and plasticity. It is used in high-end industrial products such as automobiles, aircraft, and ships, sports equipment and other fields are widely used.

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