How plastic welds retain a molecular 'memory' of their former surfaces to strengthen pipe joints
Researchers at Columbia University have used molecular dynamics simulations to discover that plastic welds in polyethylene pipes retain a 'molecular memory' of their original surfaces. This phenomenon allows polymer chains to intermingle and crystallize more effectively, explaining why properly welded joints can be as strong as the pipe itself.
Why it matters
Provides scientific insight that could improve the reliability and safety of industrial infrastructure, particularly for water and gas piping systems.
edited by Gaby Clark , reviewed by Robert Egan
This article has been reviewed according to Science X's editorial process and policies . Editors have highlighted the following attributes while ensuring the content's credibility:
Add as preferred source Simulating the molecular structure of a plastic surface as it cools. Credit: Michele Valsecchi et al. Welding plastic is a critically important part of everyday engineering—especially for preventing leaks in underground water and gas pipes. For decades, engineers have understood that a properly welded joint in polyethylene pipe can be just as strong as the pipe itself, if not stronger. However, the reason for this strength has remained a mystery.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in