poly(\uc0\u945 -methylstyrene)

polymer

Poly(α-methylstyrene) is a thermoplastic aromatic polymer derived from α-methylstyrene monomers, closely related to polystyrene but with a methyl group on the alpha carbon of the vinyl side chain. This structural modification imparts improved thermal stability and rigidity compared to conventional polystyrene, making it suitable for applications demanding higher service temperatures. The material finds use in precision optics, high-temperature electrical insulators, and specialty engineering plastics where dimensional stability under heat is critical, though it remains less common than polystyrene in commodity applications.

optical lenses and prismshigh-temperature electrical insulatorsprecision automotive componentsindustrial thermoplastic partsspecialty polymer research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Glass Transition Temperature(Tg)	205.4	°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.