HDPE surface functionalization by low-energy ion-beam irradiation under a reactive O-2 environment and its effect on the HDPE/nylon 66 blend

Citation
Hj. Kim et al., HDPE surface functionalization by low-energy ion-beam irradiation under a reactive O-2 environment and its effect on the HDPE/nylon 66 blend, MACROMOLEC, 34(8), 2001, pp. 2546-2558
Citations number
37
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
MACROMOLECULES
ISSN journal
0024-9297 → ACNP
Volume
34
Issue
8
Year of publication
2001
Pages
2546 - 2558
Database
ISI
SICI code
0024-9297(20010410)34:8<2546:HSFBLI>2.0.ZU;2-Z
Abstract
A low energy Ar+ ion-beam was used to modify the surface of a high-density polyethylene (HDPE) dry powder. The modification reaction was promoted by t he oxygen gas injected during the irradiation. This simple modification rou te is characterized as a heterogeneous, solvent-free, environmentally favor able process. The surface functional groups of the modified HDPE were confi rmed with X-ray photoelectron spectroscopy and Fourier transform infrared s pectroscopy as being various oxygen-containing functional groups. The conce ntration of the functional groups varied rapidly with the irradiation time, reached a maximum value and then slowly decreased. Because of the low-ener gy characteristics of the ion beam, the changes in the molecular weight, th e melting temperature, and the crystallinity of the modified HDPE were not significant, as evidenced by gel-permeation chromatography and differential scanning calorimetry. The theological behavior of an HDPE/nylon 66 (Ny66) blend, which depends on the blend composition, was complicated due to immis cibility whereas the ion-beam-irradiated HDPE/Ny66 blend showed a more syst ematic behavior. Also, the compatibility effect of ion-beam-treated HDPE wa s investigated in the blend of HDPE/Ny66. In the ion-beam-irradiated HDPE/b lends, a significant decrease in the domain size of the dispersed phase was observed. Theoretical models were used to estimate the interfacial tension of HDPE/Ny66 blends. The calculated interfacial tension of an ion-beam-tre ated HDPE/Ny66 blend was less than that of a nontreated HDPE/Ny66 blend, in dicating a greater interaction between the ion-beam-treated HDPE and the Ny 66 phases. In addition, the mechanical properties of the ion-beam-treated H DPE/Ny66 blend showed a positive deviation from the rule of mixture. Finall y, an explanation of the compatibilizing effect of ion-beam-treated HDPE is presented.