poly(styrene-co-methylmethacrylate)

polymer

Poly(styrene-co-methylmethacrylate) (SMMA) is an amorphous copolymer combining the rigidity and clarity of polystyrene with the improved chemical resistance and weatherability of polymethyl methacrylate (PMMA). This material bridges the performance gap between commodity polystyrene and premium acrylic, offering better environmental stability and toughness than either homopolymer alone. It is widely used in automotive glazing, consumer electronics housings, optical applications, and outdoor signage where optical clarity combined with durability and processing efficiency are required.

automotive light covers and lensestransparent electronic enclosuresoutdoor advertising and signageoptical displays and protective shieldsappliance body panelsUV-resistant transparent components

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)	375.2	K	—

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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.