Characterization of Polymer Surfaces by the Use of Different Wetting Theories Regarding Acid-Base Properties

Table 1

Surface free energy components and acidity parameter for different nonmodified polymers.

Substrate
2C-Epoxy adhesive	40.23	7.77	2.25
2C-MMA adhesive	27.95	5.41	4.33
2C-PUR adhesive	31.13	6.85	3.36
Polycarbonate (PC)	38.07	0.45	−1.75
Polyethylene terephthalate (PET)	33.29	3.33	−0.85
Polymethylmethacrylate (PMMA)	39.7	3.0	0.95
Polypropylene (PP)	33.52	0.87	0.55
Polystyrene (PS)	39.69	0.04	−1.80
Polytetrafluoroethylene (PTFE)	24.30	0.06	0.00
Polyvinyl chloride, unplasticised (PVC-U)	37.70	0.80	1.30