PVC is an atactic polymer and therefore essentially uncrystallized. However, it sometimes happens that, locally, over short chain segments, PVC is syndiotactic and can assume the crystalline phase, but the percent shear fracture never exceeds 10 to 15 %. The density of PVC is 1.38 g/cm3. Uncrystallized PVC is transparent and relatively permeable for steam.
PVC offers excellent rigidity up to the vicinity of its vitreous transition temperature. PVC offers excellent resistance to abrasion. PVCs are fragile with respect to shocks at low temperatures. The addition of plasticizers reduces the vitreous transition temperature, which makes it possible to provide a flexible PVC at ambient temperature.
PVC is an atactic polymer and therefore essentially uncrystallized. However, it sometimes happens that, locally, over short chain segments, PVC is syndiotactic and can assume the crystalline phase, but the percent shear fracture never exceeds 10 to 15 %. The density of PVC is 1.38 g/cm3. Uncrystallized PVC is transparent and relatively permeable for steam.PVC offers excellent rigidity up to the vicinity of its vitreous transition temperature. PVC offers excellent resistance to abrasion. PVCs are fragile with respect to shocks at low temperatures. The addition of plasticizers reduces the vitreous transition temperature, which makes it possible to provide a flexible PVC at ambient temperature.
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