Syndiotactic polystyrene (SPS)

Alternative and trade names
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Syndiotactic polystyrene (SPS) is a crystalline engineering plastic starting from a commodity monomeric material of styrene. SPS offers quite different properties compared to conventional amorphous polystyrene. It has a high melting point (463 K), good solvent resistance, excellent electrical properties with low dielectric loss, high heat deflection temperature, low water absorption and hydrolytic resistance. SPS also offers excellent dimensional precision during injection molding because of equal density of amorphous and crystalline parts.

This material data has been provided by Matmatch.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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23.0 °C

1.05 g/cm³

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Water absorption

23.0 °C

0.04 %

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ASTM D570, 24h equilibrium



Elastic modulus

23.0 °C

3.4 GPa

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Elongation at yield

23.0 °C

1 %

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Flexural modulus

23.0 °C

39 GPa

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Flexural strength

23.0 °C

71 MPa

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Tensile strength

23.0 °C

41 MPa

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Yield strength

23.0 °C

41 MPa

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Coefficient of thermal expansion

23.0 °C

9.2E-5 1/K

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Glass transition temperature

99.85 °C

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Heat deflection temperature, 1.80 MPa

98.85 °C

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Latent heat of fusion

53 J/g

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Max service temperature

126.85 °C

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Melting point

269.85 °C

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Dielectric constant, 1MHz

23.0 °C

2.6 [-]

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Surface resistivity

23.0 °C

1.00E+14 Ω/sq

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min., ASTM D257

Technological properties

Application areas

Thermoplastics is used for automobile parts, electrical and electronic parts.