Views: 2 Author: Site Editor Publish Time: 2024-10-14 Origin: Site
The chemical composition of PMMA is polymethyl methacrylate, which is a polymer compound polymerized from methyl methacrylate. PMMA, also known as plexiglass or acrylic, has the advantages of high transparency, low price, easy machining, etc., and is a commonly used glass alternative material. The following is a detailed analysis of the chemical composition and properties of PMMA:
Chemical composition
Basic composition: PMMA is a polymer formed by the polymerization of methyl methacrylate (MMA) monomer.
Chemical formula: Usually expressed as (C5O2H8)n, where n represents the degree of polymerization, that is, the number of monomer units.
Physical property
Transparency: PMMA is highly transparent, able to penetrate more than 92% of sunlight, and UV transmission reaches 73.5%.
Density: Its density ranges from 1.15 to 1.19 g/cm³.
Melting point and boiling point: The melting point is about 150 ° C, and the boiling point is relatively low, 121.5 ° C (note that the boiling point here may refer to the boiling point of monomer MMA, because polymers usually do not have a fixed boiling point).
Chemical property
Solubility: PMMA can be dissolved in organic solvents such as carbon tetrachloride, benzene, toluene, dichloroethane, trichloromethane and acetone.
Stability: Chemically relatively stable, but under aerobic conditions, PMMA starts to burn at 458°C, resulting in carbon dioxide, water, carbon monoxide and some low molecular compounds including formaldehyde.
Application field
Due to its excellent physical and chemical properties, PMMA has a wide range of applications in a number of fields, including but not limited to:
Construction: Used as transparent structural parts, such as Windows, skylights, etc.
Automotive industry: Used for car lights, instrument panels and other components.
Optical field: Production of optical lenses, lenses, etc.
Daily necessities: such as decorative gifts, billboards, etc.
In summary, the chemical composition of PMMA is polymethyl methacrylate, a polymer compound that plays an important role in many industries with its unique properties.