Artificial accelerated weathering of poly(vinyl chloride) for outdoor applications

Natural weathering effects on some properties of CPVC pipe material

“…Discoloration of the PVC pipes is also observed by these authors [7]. Similar results were reported by Real et al [8] for PVC under accelerated weathering.…”

“…1. As reported for PVC by several researchers [6][7][8] weathering effect on the yield strength is minimal. This was expected given that the damage due weathering is mainly a surface phenomenon.…”

“…A large number of investigations on natural and artificial weathering of PVC were performed by a number of researchers [4][5][6][7][8][9][10][11]. Puterman [4] found that while the ultimate percentage elongation of PVC specimens under tensile testing deteriorates within a short time of accelerated and natural weathering, the yield strength is hardly affected by weathering.…”

Principles of Stabilization

“…Transparent articles constitute the other challenging group of PVC products to be stabilized against UV. 356 Combinations of phenyl salicylate and maleimides were used to protect PVC products. 354 Studies of building products show that Tinuvin P (UV absorber which was frequently used in the past) is not adequate to avoid or to minimize the formation of oxidation products resulting from the combined action of light and temperature.…”

Role of titanium dioxide pigments in outdoor weathering of rigid PVC

“…Published studies comparing outdoor weathering and weatherometers relevant to hot dry degradation provide some insights for the higher temperature, higher irradiance and dry climate resulting in faster gloss loss and significantly yellower colour. [11][12][13][14] Effects of stabiliser type and TiO 2 loading Figure 9a-b shows the 60ugloss loss for Ca/Zn, Pb and Sn stabilised PVC profile samples containing Ti-PureH R-105, exposed in Phoenix and Miami respectively. The trend can be found in both exposure tests.…”