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SPS

Syndiotactic Polystyrene

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Overview

Applications

Comparison

Chemical formula

Specific gravity

1.11 (GF15%)

Thermal properties

100

Tg(℃)

270

Tm(℃)

Characteristics

Hydrolysis resistance

Low dielectric loss

Heat resistance with GF

Acid/alkali resistance

Chemical resistance

Impact resistance

Moldability

Commentary

It has the same chemical formula as the amorphous, general-purpose plastic "PS (polystyrene)."
The styrene groups are arranged in an orderly, alternating pattern (syndiotactic), which gives it crystallinity and improves its heat resistance, etc.
Its three-dimensional structure is different from that of general-purpose PS, which has no pattern (atactic).

Key points

Because of its crystalline nature, it has superior chemical and heat resistance compared to general-purpose PS.

Due to its low dielectric loss, it does not absorb electromagnetic waves easily.

Basically contains glass fiber (GF) and is molded in the mold at a high temperature (130-155℃).

使われ方

Microwave cookware

Reason for adoption

Low microwave heating (low dielectric loss), dishwasher-safe (heat, chemical, and hydrolysis resistant)

Source　Idemitsu Kosan Co.

PCB Connectors

Reason for adoption

Lead-free solder heat resistance (melting point 270°C), lightweight (low specific gravity)

Source　Idemitsu Kosan Co.

Millimeter wave radar radome

Reason for adoption

Millometer wave radar communication performance (excellent electromagnetic wave transparency in the millimeter wave range)

Source　Idemitsu Kosan Co.

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