3 ms·
Apparently you can't have crosslinking - the melt would be too viscous to be extruded from a tiny spinneret. You wouldn't use plasticizers in polyethylene, the
by HarryHirsch 9y ago
Apparently you can't have crosslinking - the melt would be too viscous to be extruded from a tiny spinneret. You wouldn't use plasticizers in polyethylene, the "plasticizer" in LLDPE is a tiny amount of long-chain terminal alkenes that serve as domain breakers.
Fibers is truly where chemistry and engineering collide.
- kragen 9y agoThis problem is even worse with PCL, which is so viscous it's almost unusable for most purposes. Thinking about PCL fibers in https://news.ycombinator.com/item?id=16380491 https://news.ycombinator.com/item?id=16380491, it occurred to me that I had made some crude PCL fibers by hand — while the plastic wasn't molten. So it occurred to me that you could probably make PCL fibers by the process of die drawing, the same way you make copper fibers or steel fibers, maybe without even the annealing steps in the middle. Presumably this would work for a variety of plastics with high elongation at break.