syndiotactic polystyrene

polymer

Syndiotactic polystyrene (sPS) is a semi-crystalline thermoplastic polymer with a highly ordered, alternating molecular structure that distinguishes it from conventional atactic polystyrene. This regular stereochemistry enables crystallization and significantly improves thermal stability, stiffness, and chemical resistance compared to standard polystyrene, making it suitable for demanding engineering applications requiring sustained performance at elevated temperatures. Common applications include automotive under-hood components, electrical connectors, food-contact packaging that requires hot-fill tolerance, and precision-molded parts in appliances and industrial equipment where superior dimensional stability and chemical inertness are required.

automotive under-hood componentselectrical connectors and housingshot-fill food packagingchemical storage containersprecision injection-molded partsappliance components

Compliance & Regulations

?UL 94?ITAR?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Young's Modulus(E)	0.2027	ksi	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions
Glass Transition Temperature(Tg)	211.5	°F	—
Melting Point / Solidus(Tm)	518	°F	—
Maximum Service Temperature(Tmax)	599	°F	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

Safety & Biocompatibility

Quality & Standards

Industry-Specific

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.