Graph Showing How the Top Surface of a Glassy Polymer Moves like a Liquid (image) University of Waterloo Share Print E-Mail Caption In a series of experiments, University of Waterloo researchers and colleagues started with very thin slices of polystyrene stacked to create tiny staircase-like steps about 100-nanometers high -- less than 0.001 per cent the thickness of a human hair. They then measured these steps as they became shorter, wider and less defined over time. The paper investigated how the top layer of glassy polymers is always moving despite the layers underneath being frozen or solid-like. The gold graph represents how the top surface is moving at one point in time. Credit University of Waterloo Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.