This is the 15119th most frequent Russian word.
полимерных
"Polymeric" - relating to polymers.
The word 'полимерных' is used as an adjective modifying 'материалов,' indicating materials that are polymer-based.
Мы изучаем свойства полимерных материалов.
We study the properties of polymer materials.
Here, 'полимерных' describes 'труб,' specifying that the pipes are made from polymer-based materials.
В этой лаборатории создают новые виды полимерных труб.
New types of polymer pipes are being created in this laboratory.
In this context, 'полимерных' modifies 'покрытий,' referring to coatings composed of polymers.