Polymethyl Methacrylate (PMMA) CAS 9011-14-7

Polymethyl Methacrylate (PMMA) – Transparent Thermoplastic for Optics, Electronics, and Architecture

Basic Information

• CAS Number: 9011-14-7

• Molecular Formula: (C₅H₈O₂)ₙ (repeating unit)

• Appearance: Colorless transparent granules or finished transparent sheets

• Density: ~1.18 g/cm³

• Glass Transition Temperature: ~105°C

• Melting Point: ~160°C (softens)

• Solubility: Insoluble in water; soluble in organic solvents such as acetone and dichloromethane

• UV Resistance: Excellent

• Storage: Store in a dry place, protected from moisture

Overview
Polymethyl methacrylate (PMMA), commonly known as acrylic glass or Plexiglas, is a transparent thermoplastic polymer derived from methyl methacrylate. It is renowned for its exceptional optical clarity, light transmission, and UV resistance, making it a popular alternative to glass in many applications. PMMA is lightweight, impact-resistant, and easily molded, which contributes to its widespread use in electronics, architecture, signage, medical devices, and optical components. Its chemical stability and weather resistance ensure long-lasting performance in both indoor and outdoor environments.

Applications

• Architecture and construction: Glazing, skylights, sound barriers, and decorative panels.

• Electronics: Display screens, light guides, and protective covers for devices.

• Medical: Dental prosthetics, bone cements, contact lenses, and surgical instruments.

• Optics: Lenses, prisms, and optical fibers.

• Signage and advertising: Illuminated signs, displays, and point-of-sale materials.

• Automotive: Tail lights, instrument panels, and exterior trim.

Key Benefits

• High optical clarity – transmits up to 92% of visible light.

• Excellent UV resistance – does not yellow or degrade under sunlight.

• Lightweight – about half the weight of glass.

• Impact-resistant – more durable than glass.

• Easy to mold and machine – suitable for complex shapes and precise parts.

• Chemically resistant to many acids, alkalis, and salts.

• Recyclable and environmentally manageable.

Handling and Storage

• Store in a cool, dry place, away from moisture and direct sunlight.

• Keep away from strong solvents that may cause swelling or dissolution.

• Use appropriate personal protective equipment (gloves, safety goggles) when machining or heating.

• Avoid overheating above 300°C to prevent decomposition and release of methyl methacrylate monomer.

• Shelf life: typically 24 months under recommended storage conditions.

Quality Assurance
Each batch is tested for molecular weight, transparency, and mechanical properties to ensure consistent quality.