Do you know the five major modification directions for PC materials?

Polycarbonate (abbreviated as PC), also known as PC plastic, is a polymer whose molecular chain contains carbonate groups. Depending on the structure of the ester groups, it can be classified into various types, including aliphatic, aromatic, and aliphatic-aromatic polycarbonates. Among these, aliphatic and aliphatic-aromatic polycarbonates exhibit lower mechanical properties, which limits their application in the field of engineering plastics.

Currently, only aromatic polycarbonates have achieved industrial-scale production. Due to their unique structure, polycarbonates have become the fastest-growing general-purpose engineering plastic among the five major engineering plastics.

However, as times evolve and industry demands increase, the requirements for PC materials are also becoming ever higher. Ordinary PC materials can no longer meet the needs of enterprises in producing specific products; therefore, modifying PC materials has become absolutely necessary. Currently, there are five main directions for PC material modification. Today, Tesheng Plastics will take you on an in-depth exploration of these!

Modification Directions for Five Types of PC Materials

Enhanced PC

This material boasts excellent impact resistance, adjustable impact performance, low molding shrinkage, outstanding dimensional stability, superior weather resistance, high low-temperature impact strength, and is suitable for spray coating. It is primarily used in thin-walled products, automotive components, mobile phones, and other electronic and electrical devices.

Flame-retardant polycarbonate

This material’s flame-retardant performance meets the industry standard UL94 V0/1.5mm and has successfully passed U.S. UL certification. It can withstand a free-fall impact from a 1.3-meter height using a 500-gram steel ball, and its welding process also passes the free-fall test. Moreover, its environmental performance complies with industry regulations such as ROHS and REACH. Its heat deflection temperature (under 1.82 MPa/3.20 mm) reaches as high as 127°C. It is primarily used in high-end chargers, lighting fixtures, switch panels, office automation equipment, and other electronic and electrical products.

Enhanced Modified Polycarbonate

By adding reinforcing materials to plastics, their performance—especially mechanical properties—can be significantly enhanced, even doubling in some cases. This type of reinforced modification not only elevates mechanical performance to a new level but also endows the material with outstanding overall performance. The key characteristics are as follows:

High specific strength: So-called high specific strength refers to the ratio of a material's strength to its relative density. By enhancing the specific strength of certain plastics and metals,

Good shock absorption performance and excellent overload safety.

Good fatigue resistance: Excellent ability to withstand repeated stress.

Good heat resistance: With enhanced treatment, the heat distortion temperature can be significantly improved.

Lower linear expansion coefficient: Due to the addition of fiber materials, the linear expansion coefficient of the reinforcing material is significantly lower than that of the plastic matrix itself. Consequently, the molded product exhibits a lower shrinkage rate, making it suitable for manufacturing products with high dimensional accuracy requirements.

Filled Modified Polycarbonate

Refers to adding solid fillers into a plastic matrix to reduce costs or modify certain properties of the plastic.

Synergistic effect: Most fillers are significantly cheaper than plastics, so adding plastic can reduce costs.

Improving Certain Properties: While some properties of plastics are still less than ideal, adding fillers can enhance certain of these properties—for example, the material’s flexural strength and heat resistance.

Functionalization: For example, adding metal powders or carbon black as fillers can impart electrical conductivity to the material.

Alloy

A material made by blending two or more different plastics is called a plastic alloy. The primary purpose of preparing alloys is to achieve better complementarity among the various plastic components; of course, certain properties of the alloy can even surpass those of the individual components themselves.