# Properties of Conductive PS Compound | RenJie Plastics > Source: https://www.rjplastics.com/en/article/properties-of-conductive-ps-compound ## Knowledge of Conductive Plastics [Home](/en/)›[Support](/en/support/thermally-knowledge)›[Knowledge of Conductive Plastics](/en/support/conductive-knowledge)›**Properties of Conductive PS Compound** Support - Knowledge of Thermally Conductive Plastics - Knowledge of Conductive Plastics - Knowledge of Modified Plastics Need help choosing? [Get a quote](/en/contact) ## Properties of Conductive PS Compound ** ### 1. Properties of Conductive PS Compound Conductive PS (polystyrene) is a conductive compound with **antistatic** and **electromagnetic interference (EMI) shielding** functions. #### 1.1 Base PS Resin Characteristics Polystyrene is a **milky white** polymer that is **non-toxic, odorless** and very stable in water, and it is classified as an **environmentally friendly material**. Its **density is 0.89–0.91**, making it one of the lightest plastic varieties. PS has good mechanical properties: **apart from impact resistance, its other mechanical properties are better than those of polyethylene**. #### 1.2 Conductive Performance Conductive PS compounds have excellent conductivity. According to different application requirements, materials with different conductive properties can be obtained by **adjusting the type and amount of conductive filler**. Both **surface resistivity and volume resistivity** can meet a variety of occasions requiring conductive properties, with **surface resistivity ranging from 10⁴ to 10⁹ Ω/sq**. #### 1.3 Chemical Resistance Conductive PS compounds have good chemical resistance and resist most chemicals. They withstand the attack of certain **acids, alkalis, salts** and other chemicals while maintaining material performance stability. In the chemical and electronics industries they can be used in environments exposed to chemical substances and are **especially suitable for semiconductor packaging materials**. #### 1.4 Molding Processability Conductive PS compounds have good molding processability and can be made into terminal products of various shapes — such as **PS sheets, PS plates, PS pipes and injection molded parts** — through different processing methods including **injection molding, extrusion and blow molding**. ### 2. Disadvantages of Conductive PS Compound #### 2.1 Relatively Poor Thermal Stability The **glass transition temperature and melting point of conductive PS are relatively low**, so its thermal stability is poor, generally around **70 °C–100 °C**. When the temperature approaches or exceeds its glass transition temperature, performance changes significantly — for example, **reduced hardness and poor dimensional stability**. As the temperature continues to rise to the melting point, the material begins to melt. Conductive PS is therefore limited in **high-temperature environments or applications with high heat resistance requirements**. In some high-temperature electronic equipment and automotive engine peripheral parts, for example, conductive PS may not be applicable. #### 2.2 Relatively Large Thermal Expansion Coefficient The **thermal expansion coefficient of conductive PS is relatively large**, meaning the dimensions of the material change considerably with temperature. In applications with high dimensional accuracy requirements — such as **the packaging of precision electronic components and optical instruments** — the thermal expansion characteristics of conductive PS may affect product performance and reliabilit ### Question not answered here? Send us the grade and application, our engineers will advise. *Your name***Company Email***Phone / WhatsApp Country Product of interest Quantity Target price Application Message Send inquiry* We only use your details to reply to this inquiry. We never share them. ### Need a quotation or product data? Send us your specification and we will come back with a solution within 24 hours. [Get a quote](/en/contact) [tjh@rjplastics.com](mailto:tjh@rjplastics.com)