Poly Methyl Methacrylate (PMMA), widely recognized by its CAS number 9011-14-7, is a synthetic polymer that has revolutionized many industries due to its exceptional blend of chemical, physical, and optical properties. For professionals in product development and manufacturing, a deep understanding of PMMA's chemistry is fundamental to its effective application. As a dedicated manufacturer and supplier of PMMA in China, we aim to provide clarity on the core attributes that make this polymer so valuable.

Molecular Structure and Polymerization

PMMA is a thermoplastic polymer derived from methyl methacrylate monomer. Its typical linear formula, [-CH2C(CH3)(CO2CH3)-]n, describes a chain of repeating units where each unit contains a methyl group and a methacrylate ester group. This structure imparts a unique combination of rigidity and clarity. The polymerization process can be controlled to yield polymers with varying molecular weights, influencing properties like melt flow rate, viscosity, and mechanical strength. For instance, the lower molecular weight grades generally offer improved processability, which is a key consideration when you buy PMMA for specific manufacturing techniques.

Key Physical and Mechanical Properties

  • Appearance: As previously mentioned, PMMA is typically supplied as a white powder, ready for processing.
  • Density: The density of PMMA generally falls between 1.16-1.19 g/cm³, making it relatively lightweight compared to glass.
  • Mechanical Strength: PMMA exhibits high tensile and flexural strength, along with a good impact resistance. Its ball indentation hardness, often cited in N/mm², indicates its surface toughness and resistance to deformation. This makes it suitable for applications requiring robust physical integrity.
  • Thermal Stability: With a glass transition temperature (Tg) around 105°C, PMMA maintains its structural integrity in moderate temperature ranges. Understanding this property is crucial for setting operational limits in applications involving heat.
  • Melt Flow Rate (MFR): The MFR, measured in g/10min, indicates how easily the polymer flows when melted. Different grades of PMMA will have varying MFR values, affecting their suitability for different processing methods like injection molding or extrusion.

Optical Properties and Chemical Resistance

  • Refractive Index: PMMA has a refractive index around 1.49-1.51, contributing to its excellent optical clarity and making it suitable for lenses and optical components.
  • UV Resistance: A standout property of PMMA is its inherent resistance to UV radiation, preventing degradation and yellowing upon prolonged exposure to sunlight. This makes it ideal for outdoor applications where durability is key.
  • Solubility: PMMA is soluble in various organic solvents, a property that can be leveraged in specific coating and adhesive formulations.

Sourcing High-Quality PMMA from China

As a leading manufacturer of Poly Methyl Methacrylate in China, we are committed to delivering consistent quality that aligns with these key chemical and physical properties. Our manufacturing processes ensure that you receive PMMA powder that is ideal for your specific applications, whether they are in dentistry, optics, automotive, or construction. We provide detailed technical specifications to help you select the right product.

Inquire About Our PMMA Solutions

Discover the chemical excellence of our Poly Methyl Methacrylate. Contact us today to learn more about our product offerings, request a sample, or get a competitive quote. Partner with a trusted China supplier to source the best PMMA for your manufacturing needs.