Mechanism of Plasticizer Evaporation from Polyvinyl Chloride
Abstract—The mechanism of dioctyl phthalate evaporation from polyvinyl chloride lms lled with dispersed carbon ber was studied by thermal gravimetric analysis. At a low degree of lling, the evaporation is controlled by the diffusion of the plasticizer in the polymer.
Mechanism of plasticizer evaporation from polyvinyl chloride
The mechanism of dioctyl phthalate evaporation from polyvinyl chloride films filled with dispersed carbon fiber was studied by thermal gravimetric analysis. At a low degree of filling, the evaporation is controlled by the diffusion of the plasticizer in the polymer. At increased degrees of filling, evaporation of the plasticizer from the film surface becomes the limiting step. The change in
Plasticiser loss from plastic or rubber products through
The migration of plasticiser from polymers to a gas phase is a two-step process that includes diffusion from the polymer bulk to the surface followed by evaporation from the surface to the...
Mechanism of plasticizer evaporation from polyvinyl chloride
The change in the plasticizer evaporation mechanism is associated with the effect of the carbon fiber on the formation of the polymer matrix structure and on the plasticizer distribution. Discover
Aging of plasticized polyvinyl chloride in heritage
The results suggest that different underlying mechanisms of plasticizer migration take place depending on the artificial aging environment. Aging in open conditioning leads to a plasticizer loss controlled by diffusion in contrast to the aging in closed conditioning showing that evaporation governs plasticizer migration.
- What is the evaporation rate of plasticiser?
- Second, the plasticiser evaporation rate from polymer surfaces is similar (on the same order of magnitude) as the rate from their pure liquid state, indicating that the constant plasticiser concentration on the surface is close to that in the pure liquid (100%).
- Does evaporation affect plasticiser loss rate?
- First, there is the case where the plasticiser loss rate is constant, at least over a certain time-period (observed as the linear loss as a function of time at 90 °C in Fig. 4b), meaning that the loss is strongly limited by the evaporation process.
- How do plasticisers leave a polymer?
- Plasticisers, when not chemically attached to polymer chains, can in certain conditions leave the polymer through migration, evaporation or extraction by liquids.
- What is evaporation-controlled and diffusion-controlled plasticiser?
- The loss is either diffusion- or evaporation-controlled, where the former usually occurs at high temperatures and the latter at low temperatures. In the evaporation-controlled mode, a film of plasticiser is often formed at the surface, which is indicated by a linear loss with time, at least over a certain time period.
- Can plasticizers be released from polymer films through vapor phase?
- A model study for release of plasticizers from polymer films through vapor phase. J. Appl. Polym. Sci. 29, 3185–3195 (1984). Ljungberg, N., Andersson, T. & Wesslén, B. Film extrusion and film weldability of poly (lactic acid) plasticized with triacetine and tributyl citrate. J. Appl. Polym. Sci. 88, 3239–3247 (2003).
- What is the difference between nitroplasticiser and polyurethane evaporation rates?
- Smith et al. 26 reported that the difference between the evaporation rates of a nitroplasticiser from the pure liquid plasticiser and from a polyurethane surface at 85 °C was within an order of magnitude.
