Surface tracks on polymers: A means to probe material properties at the nanometer scale?

摘要: Abstract The morphology and the dimensions of nanometer-sized craters crater rims induced by individual MeV heavy ions impacting polymer surfaces have been systematically investigated means scanning force microscopy. We demonstrate that surface tracks varies with temperature, molecular weight ( M w ) tacticity thin films. Such parameters influence chain mobility characteristic relaxation times polymer, which appear to be key factors determining final shape size observed holes hillocks. Because correlation impact features thermal rheological properties polymers, problem can inverted track may used identify physical targets. This procedure has applied model It was possible a critical target temperature above sharp change in is microscopy images. propose this glass transition temperature. Also, decreases steeply increasing up very little. region around c ′ , at entanglement coupling macromolecular chains becomes important.