Yook, Ju Young Lee, Myungsuk Song, Kwang Ho Jun, Jaeho Kwak, Soonjong 2024-01-20T10:01:15Z 2024-01-20T10:01:15Z 2021-09-04 2014-05 1598-5032 https://pubs.kist.re.kr/handle/201004/126853 We have performed NH3 plasma treatment of poly(ethylene-2,6-naphthalate) (PEN) surfaces with the purpose of incorporating nitrogen functional groups. X-Ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion spectroscopy (ToF-SIMS) were used to determine changes in the chemical structure of the PEN surfaces in response to different levels of plasma power. Plasma power had a significant impact on the type of nitrogen functional groups as well as the level of nitrogen incorporation. Considerable degradation and oxidation occurred with an excessive plasma power, rather than nitrogen incorporation. Optical emission spectroscopy (OES) confirmed that the type of chemical species present in the plasma discharge primarily determines the surface functionality with the plasma treatment. Partially decomposed ammonia species (NH and NH2) are considered to react with the PEN surface and form primarily amine groups. However, stable N-2 species produced by bimolecular combination of fully decomposed atomic species led to the formation of imine groups via atomic rearrangement. Moreover, ion bombardment by N-2 (+) species adversely affected the chemical structure of the surface, resulting in degradation of ester and carbon-carbon bonds and surface etching of carbon atoms. English POLYMER SOC KOREA HIGH-DENSITY POLYETHYLENE ION-MASS-SPECTROMETRY POLYMER SURFACES ADHESION OXYGEN ARGON XPS SPECTROSCOPY DEGRADATION CHEMISTRY Surface modification of poly(ethylene-2,6-naphthalate) using NH3 plasma Article 10.1007/s13233-014-2093-y 1 MACROMOLECULAR RESEARCH, v.22, no.5, pp.534 - 540 MACROMOLECULAR RESEARCH 22 5 534 540 scie scopus kci ART001875973 000336431700011 2-s2.0-84901857266 Polymer Science Polymer Science Article HIGH-DENSITY POLYETHYLENE ION-MASS-SPECTROMETRY POLYMER SURFACES ADHESION OXYGEN ARGON XPS SPECTROSCOPY DEGRADATION CHEMISTRY poly(ethylene-2,6-naphthalate) plasma treatment NH3 plasma surface modification