Study of surface activation of PET by low energy (keV) Ni+ and N+ ion implantation

Influence of SHI upon nanohole free volume and micro scale level surface modifications of polyethyleneterephthalate polymer films

“…The calculated values of E g for pristine as well as irradiated samples are given in Table 1. The E g value for pristine sample is 3.90 eV which is in close agreement with the values calculated by other groups in the literature [57,49,25]. The number of carbon atoms per conjugation length (N) was calculated by using following equation given by Fink et al [58,59].…”

“…The surface morphology of the polymer can be changed by ion treatment. The increase in surface roughness by irradiation leads to the cross-linking of the polymeric chains; which further leads to the changes in the free volume fraction in modified surface layers of the polymers [25]. The other properties such as adhesion, friction, wetting and biological compatibility are also influenced by the surface composition and structure of the polymer [10].…”

“…The permeability is directly related to the free volume content [28]. Polyethylene terephthalate (PET) is among the category of semicrystalline polymers having high mechanical strength, inert to chemical reactions and resistant to thermal environment [25]. PET membranes are used for gas separation properties.…”

Plasma Surface Modification of Polycarbonate and Poly(propylene) Substrates for Biomedical Electrodes

“…In fact, the optimization of the adhesion between thin metallic or ceramic films and common polymers represent some of the most relevant challenges in recent R&D projects, due to the very important chemical and structural differences between those materials. Recent literature reveals an increasing number of scientific studies dealing with different treatments to improve adhesion of several kinds of polymeric substrates to thin films, according to their particular relevance for a certain application 4, 8–14. Among the several treatments that are known and accepted as resulting in an enhancement of the adhesion of functional coatings to polymeric substrates, those involving plasmas are often referred, not because of their outstanding results, in fact there are others equally important and with good results,8–12 but basically because of their easy implementation.…”

Opto-chemical response of Makrofol-KG to swift heavy ion irradiation

“…After irradiation, the roughness increases up to 18.94 nm. The increased roughness is related to the progessive degradation of the polymer chain due to cross-linking [18].…”