Modification of poly­ethylene terephthalate track membranes by gas phase deposition of poly-p-xylylene
The possibility was shown to modify pore characteristics of track membranes by means of poly-p-xylylene deposition from gas phase at a pressure of 5...10 Pa. The pores of micrometer diameter transform from the initial cylindrical to barrel-shaped form having minimal cross-section at its mouth and widened middle part. The pores of nanometer diameter acquire narrowed cross-section at their mouth only. The forecast is made that uniform coating of inside pore surface can be obtained only at ultralow pressure of monomer during the deposition process.