Abstract
In the present work, both unused plasticized poly(1-chloroethylene) membranes and membranes taken from a flat roof area were comprehensively analysed. First, tensile strength and elongation at breaking points were determined, followed by measurements of wettability. Secondly, morphological changes were analysed using scanning electron microscopy (SEM). To study chemical changes in aged membranes, Fourier transform infrared spectroscopy (FTIR) analysis in the attenuated total reflection mode (ATR) was used. Finally, thermogravimetric analysis and differential scanning calorimetry (TGA-DSC) were performed simultaneously to study thermal degradation. The results show obvious changes in the mechanical, physical and chemical properties of membranes caused by plasticizer loss. Surface microstructure becomes stiffer, which leads to contractions and the prevalence of voids. In cross-sectional area, average thickness values decrease. Due to the degradation of the plasticized waterproofing membranes, the roofing area had to be completely replaced.
Highlights
Poly(1-chloroethylene) (PVC) is formed by the polymerization of vinyl chloride monomers
It appears that the polyester mesh is well encapsulated within the membrane matrix and has not degraded over time
There is a tendency for tensile strength to increase with age, as the membrane loses flexibility over time.[9]
Summary
Poly(1-chloroethylene) (PVC) is formed by the polymerization of vinyl chloride monomers It is one of the most commonly used thermoplastics in construction, automotive, electrical parts and packaging.[1] The properties of PVC can be significantly improved by adding plasticizers to make it more flexible and durable, which greatly expands its applications.2, 3Plasticized PVC membranes are among the most commonly used waterproofing materials for roofing and geotechnical applications. Despite extensive research in recent years in the field of testing of waterproofing membranes, there is still a shortage of specific studies on the durability, repairability and performance of such materials in roofing applications Plasticizers escape from the membranes through evaporation, leaching, and migration into other materials, causing significant changes in material flexibility, hardness, mass and elasticity.[5]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
