Analysis of degradation mechanism of plasticized PVC under artificial aging conditions

Degradation behavior and application of recycled PVC sheet made of floor sheet for railway vehicle

“…These changes of the recycled specimens were quite different from those of virgin specimens [10]. These recycled specimens did not indicate a high mechanical strength; however, it is presumable that the recycled specimen was suitable material for a long-term use at the outdoors, in case high mechanical strength is not required.…”

“…4. The initial tensile strength was 3e4 MPa that was approximately one-fifth of virgin specimen [10]. As described above, a series of recycled specimens have much roughness as shown in Fig.…”

“…However, the change of plasticizer concentration was quite different from that of the case of virgin specimen. The flow out speed of plasticizer seems to relate with the contact surface area with sprayed water [10]. A series of recycled specimens have much roughness because of containing the vulcanized surface layer of the floor sheet.…”

Comparative scanning electron microscope study of the degradation of a plasticized polyvinyl chloride waterproofing membrane in different conditions

“…xenon lamps) (7). Sometimes, a cyclic spray of distilled water is applied to one side of the specimen sheet (8), in addition to UV radiation. Artificial thermal ageing tests are also common.…”

Principles of Uv Degradation

“…In Figure 5.15, photobleaching begins to occur below 340 nm. 39 Figure 5.20 shows that temperature during photolytic degradation affects its rate. In the Okazaki spectrograph, samples were exposed at 25 o C and, although temperature of exposure in a Weather-Ometer with cut-off filter is not given, it must have been much higher (at least 65 o C), because experiments are typically conducted at higher temperatures and samples were almost covered with filter and exposed on a black background (filter was positioned at the distance of 1/8 inch above the sample).…”