Characterization of surface-modified poly(ethylene terephthalate) fibres by inverse gas chromatography

Surface characterisation of plasma-modified poly(ethylene terephthalate)

“…After the plasma treatments the adsorption heats show a general moderate increase in absolute value. These for the particular case of n-decane in the samples treated by plasma are very close to those reported by Parlett et al [23] in the study of PET fibres by IGSC. Nevertheless, still the values of H 0 A are smaller in absolute value than H V which suggests that the plasma treatments only affect the external surface of the PET in agreement with the surface area measurements and AFM pictures.…”

“…The need to control the surface characteristics of this polymer (e.g., its acid-base behaviour, hydrophilicity or biocompatibility) stems from specific requirements for given applications. Currently several approaches are being developed with this aim, including laser and UV radiation exposure, alkaline hydrolysis or plasma treatment [3][4][5][6][7][8][9][10][11][12]. Among the reported methods, the technique of gas-discharge low-temperature plasma modification is a particularly attractive way to modify the surface chemistry and morphology not only of PET but of polymeric materials in general [2,11,13].…”

“…These techniques provide a variety of complementary information on the physicochemical changes on the polymer surface upon plasma exposure. Thus, DRIFTS allows to follow the evolution of the chemical groups present on polymer surfaces, and IGSC is useful to reveal the surface energy of different solids [19][20][21][22][23][24]. The high resolution capabilities of AFM are very suitable to disclose the nanometer scale structural modifications of plasma-treated polymers [25,26] whereas CO 2 adsorption provides information on the surface area and porosity.…”

Effects of oxygen and carbon dioxide plasmas on the surface of poly(ethylene terephthalate)

“…Unfortunately, as-prepared polymers seldom display the specific characteristics required for these applications, so that postproduction surface modifications are often needed. Usual modification techniques for specific purposes include treatments by flame, hot press, abrasion, plasmas, electromagnetic radiation, or ion beams [3][4][5][6][7][8][9][10][11][12]. Among these, plasma treatment is probably the most versatile way to modify the surface characteristics of polymers [13].…”

Surface modification of high-performance polymeric fibers by an oxygen plasma. A comparative study of poly(p-phenylene terephthalamide) and poly(p-phenylene benzobisoxazole)

“…The behavior exhibited by the plasma-treated PPTA samples as well as ZO 4 (q 0 d > − H a liq ) is typical of adsorption processes where the adsorbate-adsorbent interactions are stronger than the adsorbate-adsorbate ones, and this typically occurs in highcrystalline polymers [38]. High q 0 d values are produced when the adsorption process takes place in micropores with a size close to the molecular dimension of the probe, so that the closer the molecular dimension and the pore width, the higher the enthalpy [39,40].…”