Study of the migration of PVC plasticizers - ScienceDirect
2.3. Migration test. Small squared strips of polystyrene ( 3 mm ×3 mm) with approximately 1 mm of thickness were placed between two PVC sheets of 2 mm of thickness, and kept under mild pressure (217 kPa) in a oven at 50 °C for 1 week. Plasticizer migrated after this time, was determined by thermogravimetric analysis, in a Perkin-Elmer
Plasticizer migration from PVC cable insulation - ScienceDirect
Migration of the plasticizer from PVC-P to a surrounding medium leads to an increase in the Young's modulus and a decrease in the strain at break [11]. Migration includes two separate processes; diffusion of the plasticizer within the polymeric material and plasticizer transport from the polymeric material boundary to the surrounding medium.
Application of small punch test to lifetime prediction of plasticized
Linde et al. presumed plasticizer migration to be dominant under PVC wire deterioration and predicted a lifetime of 88 years at 25 °C from the residual quantity of the plasticizer in wires by using the Arrhenius method . In addition, extensive attempts have been made to predict the residual lifetime of PVC wires.
Plasticizer Migration - an overview | ScienceDirect Topics
The plasticizer migration rate from PVC to polyethylene decreased when plasticizer polarity increased. For example, DOS is better absorbed by polyethylene than DOP or TCP. Migration rate of plasticizer increases when interaction between polymer and plasticizer decreases.
Plasticizer migration from PVC cable insulation - The challenges
A single strand PVC-P insulation including an internal metal conductor removed from the jacketed assemblies of a signal cable showed brittleness after 30 years service at 25 +/- 3 degrees C in air. The PVC compound contained diisodecyl phthalate (DIDP), di(2-ethylhexyl) phthalate (DEHP) and a sizeable fraction of filler.
- What are plasticizer contents in service-aged single strand insulation?
- Plasticizer contents (DEHP ○,DIDP ● and total □) in service-aged single strand insulation with internal metal conductor (30 years) plotted as a function of distance from the end of the jacketing insulation. The region with intact jacketing is indicated by negative distances.
- What happens when a plasticizer migrates from PVC-P to a surrounding medium?
- Migration of the plasticizer from PVC-P to a surrounding medium leads to anincrease in the Young's modulus and a decrease in the strain at break . Migration includes two separate processes; diffusion of the plasticizer within the polymeric material and plasticizer transport from the polymeric material boundary to the surrounding medium.
- Do plasticisers migrate from polymers to a gas phase?
- This paper addresses the kinetics and predictions of plasticiser migration from polymers to a surrounding gas phase, an important issue for plastic and rubber products exposed to high service temperature conditions and during accelerated ageing and testing.
- Does plasticizer evaporation affect the deterioration of service-aged insulation?
- The deterioration in the oven-aged samples was controlled by plasticizer evaporation, which led to a linear decrease in plasticizer content with ageing time. The service-aged insulation showed a more complex behaviour. An important piece of information was obtained from the liquid chromatographic analysis of the service-aged insulation (Fig. 11 ).
- What is air ageing of plasticized polyvinylchloride (PVC-P)?
- Air ageing of plasticized polyvinylchloride (PVC-P)activates three different deterioration processes: dehydrochlorination, oxidation and plasticizer loss by migration .
- How much plasticizer is in a service-aged insulation?
- The limits defined by the standard deviations in εb yielded the plasticizer contents: 5 and 15 wt.%. More unexpected was the low Young's modulus of the service-aged insulation: 300 ± 170 MPa. This corresponds to a total plasticizer contentbetween 18 and 21 wt.% ( Fig. 9 ), which is not in agreement with the εb data.
