Tailoring the desired optical and mechanical performance of polyester‐plasticized PVC films: the role of different light stabilizers on the photo‐degradation

Abstract

Effect of hindered amine light stabilizer (HALS: C944) and ultraviolet absorbers (UVAs: UV326, UV531) on the photo‐stabilities of polyester‐plasticized poly(vinyl chloride) (PVC) and polyester‐plasticized PVC/pigment yellow (PY) films were studied systematically. Both ultraviolet absorbers (UVAs) and hindered amine light stabilizer (HALS) could slow down the discoloration of polyester‐plasticized PVC and polyester‐plasticized PVC/PY films. However, the addition of UVAs protected polyester‐plasticized PVC films from being discolored and its efficiency is higher than HALS. The specific order of stabilizing effect on the photo‐oxidation is UV326 > UV531 > C944. For the optical performance, both UVAs and HALS could help to maintain the transmittance of visible light after photo‐degradation. The former could effectively adsorb ultraviolet (UV) light and resulted in lower transmittance of UV light. For the polyester‐plasticized PVC/PY systems, even though HALS and UVAs cannot help to maintain the shielding ability in high‐energy visible region after UV irradiation, they can help prevent the loss in transmittance of visible light. The surface morphology exhibited small holes on the surface of the films that contain UV531 or UV326; while large and deep holes were observed on the surface of PVC films without additives, C944‐doped and C944/PY‐doped films, indicating the higher UV‐stabilizing effect of UVAs. With regard to mechanical properties, UVAs and HALS can help to prevent the loss. Our present study systematically revealed the role of different stabilizers on the polyester‐plasticized PVC and polyester‐plasticized PVC/PY systems and paved the way to offer PVC materials with functional optical performance and desired long‐term performance using different light stabilizers. Copyright © 2017 John Wiley & Sons, Ltd.

The effect of two different UV absorbers combined with antioxidants on UV resistance of HDPE

“…This indicates that in the HDPE matrix, the long‐term anti‐photooxidation degradation effect of UV‐531 using with antioxidant is better than the combination of UV‐326 and antioxidant. This result is contrary to the above theoretical analysis and other author's research conclusions 27 . This may be due to the precipitation of additives.…”

“…This result is contrary to the above theoretical analysis and other author's research conclusions. 27 This may be due to the precipitation of additives. It is later verified by other characterizations.…”

The influence of ultraviolet radiation on the optical properties of glass fibre reinforcements for polyurethane matrix composites

“…As can be seen from the YI results (Table 2), glass fibre reinforcements containing larger amounts of polyester binder showed a considerable increase in YI values with increases in the duration of UV exposure time. Because the glass is inert to the effects of UV radiation, it was assumed that this change was due to the degradation reactions in the binder component, which corresponded with findings reported by Yin et al 16 This was also confirmed by the fact that sample C, which contained the largest amount of polyester as a binder, exhibited the most pronounced colour change compared with samples A and B, both of which contained smaller total amounts of polyester binder (Figure 1). Silanes generally exhibit a higher resistance to UV radiation due to the presence of the -Si-O-bond in the main polymer chain.…”

Preparation and characterization of green‐based anti‐ultraviolet and antidripping biodegradable film

“…In areas with high UV intensity, such as plateau areas (Xinjiang and Tibet in China), agricultural films usually require stronger UV aging resistance to be more conducive to plant growth 15,16 . Generally, a certain amount of UV resistant additives such as UV‐531 and UV‐P can be added to increase the aging resistance 17,18 . In this paper, the green bio‐functional plastic based on PBAT can be obtained by adding different functional and natural additives as the agents.…”