Effect of UV radiation on the semi-interpenetrating polymer networks based on polyurethane and epoxy maleate of bisphenol A

Improving the UV degradation resistance of epoxy coatings using modified carbon black nanoparticles

“…3-6. Bands appeared in wavelengths of 1290, 1245 and 1120 cm −1 showed the symmetric and asymmetric stretching vibrations of C O band [34,35]. The bands observed in wavelengths 3040, 1600, 1514 and 822 cm −1 are also characteristic of aromatic ring, while the band at 1190 cm −1 corresponds to the stretching vibration in ether band [35,36].…”

Investigations on the thermal stability of a MDI based polyurethane elastomer

“…Urethane elastomers are rubber like polymers with exceptional physical and chemical characteristics [3]. Therefore, polyurethanes are polymers available for many technical applications when flexibility, durability, and shock absorption are needed [4][5][6]. They also exhibit good adhesion properties with metals, wood and ceramics.…”

The influence of polychromic light on the surface of MDI based polyurethane elastomer

“…The polyurethane elastomers (PU) are probably the most flexible class of polymers because they can be processed by extrusion, injection and molding [1,2]. The physico-mechanical properties, the chemical resistance and the good processability make PU available in many technical applications as protective coatings, adhesives, biomedical materials [2,3].…”

“…The physico-mechanical properties, the chemical resistance and the good processability make PU available in many technical applications as protective coatings, adhesives, biomedical materials [2,3]. Although the PU materials have good mechanical properties, however their use as coating materials is limited by the sensitivity to the light.…”

“…Atomic force microscopy (AFM) analysis on photodegraded surfaces of polyurethane coating has identified blisters under continuous exposure while under dark-light cycles the blisters retained a constant size and shape [5,6]. The FT-IR analysis evidenced the presence of low concentrations of hydroperoxides that are responsible for photoinduced degradation [2,4,7].…”