A new way to analyze how coatings of tiny particles alter the properties of transparent plastic could help researchers create lightweight windows with nearly the strength of glass. The same method could also lead to high-strength, scratch-resistant coatings that could be applied to many different materials, according to the MIT researchers who developed the analysis.

The analysis used a polymer called poly(methyl methacrylate), or PMMA, which is widely used as a glass substitute. Known generically as acrylic, and sold under trademarks such as Lucite or Plexiglas, this material can be brittle and is far less resistant to scratching than glass.

Other researchers have added silica particles measuring just nanometers across to PMMA, creating a polymer-particle nanocomposite with much greater strength. But the MIT team, for the first time, has found a way to analyze the particle-polymer interactions of such coatings at the nanoscale, which could facilitate the discovery of improved coatings. Their work was reported in July 2011 in the journal Soft Matter.

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