Adhesion mechanism of aluminum, aluminum oxide, and silicon oxide on biaxially oriented polypropylene (BOPP), poly(ethyleneterephthalate) (PET), and poly(vinyl chloride) (PVC)

Durability of nanosized oxygen-barrier coatings on polymers

“…A considerable amount of work has been dedicated to aluminized polymers in the past decades, the main emphasis being put on the analysis of interface interactions and chemistry [50][51][52][53][54][55][56]. In these works, the good adhesion between Al and a number of polymers, particularly polyesters, was attributed to the formation of covalent bonds (Al-O-C oxi-carbide complex and carbide bonds), whereas hydrogen bonds were found to have a negligible influence on adhesion [53].…”

“…In these works, the good adhesion between Al and a number of polymers, particularly polyesters, was attributed to the formation of covalent bonds (Al-O-C oxi-carbide complex and carbide bonds), whereas hydrogen bonds were found to have a negligible influence on adhesion [53]. There exist also numerous analyses of interfacial interactions between metals and polymers, mostly poly(ethylene terephthalate) (PET).…”

“…The numerous analyses of the interfacial interactions between silicon oxide coatings and various polymer substrates revealed the presence of Si-C and Si-O-C covalent bonds [53,[64][65][66][67][68][69][70][71][72][73][74][75][76][77]. The influence of deposition conditions and pretreatments, such as plasma activation of the polymer surface, are reviewed by Benmalek and Dunlop in case of SiO x and Al y O z coatings on polymer substrates [65].…”

“…The authors observed that the barrier depends on coating thickness, and rougher surfaces, such as that of polyethylene, require thicker coatings. The contribution of polar, hydrogen bonds to adhesion was found to be negligible, and strong adhesion between SiO x and polymers requires the presence of oxygen at the interface to form the above mentioned covalent bonds [53]. Among the other relevant studies devoted to the deposition of oxides onto polymer substrates, one may cite TiO 2 coatings.…”

“…This technique, or derivatives, have been largely used to test the adhesion of thin metal films on polymers [57,60,113,[230][231][232][233][234] and oxides on polymers [7,78]. In the case of metal oxide thin films on PET and PVC, Bichler et al concluded that the peel strength often exceeds the measurement limit, and the thin films cannot be peeled off due to high adhesion levels [53,71,72]. Another limitation of the peel test is the introduction of third body, the adhesive backing, in the system, which seriously complicates the determination of absolute value of coating adhesion.…”