Plasticizer - an overview | ScienceDirect Topics
Plasticizers are low molecular weight substances added to a polymer solution to promote its plasticity and flexibility. Therefore, the plasticizers make the polymer solution more suitable for the application of film coating. There should be chemical similarities between the polymers and its plasticizers.
Plasticiser loss from plastic or rubber products through diffusion and
The diffusivity generally increases with the concentration of plasticiser, which can be explained by the increase of the free volume and mobility of the polymer molecules in the presence of...
Plasticizer
The molecules of plasticizer take control over mobility of the chain - a polymer chain does not show an increase of the free volume around polymer ends. If plasticizer/water creates hydrogen bonds with hydrophilic parts of the polymer, the associated free volume can be decreased. [clarification needed] [6]
Plasticizers – Benefits, Trends, Health, and Environmental Issues
Plasticizers soften the PVC to make it flexible and bendable. This opens up a huge range of possibilities for new applications. One of the main benefits of plasticizers is the durability they confer onto PVC applications, which can ensure high performances for up to 50 years.
Plasticizer - an overview | ScienceDirect Topics
Introduction of plasticizers into the biopolymer reduces the melt viscosity of the polymer and lowers the temperature, pressure, and shear rate required to melt-form the polymer. Plasticizers also prevent heat build-up and consequent discoloration and molecular weight decrease during processing steps, such as production and packaging.
- How do plasticizers affect polymer morphology?
- Among those, adding plasticizer is the simplest and most commonly used way to modify polymer morphology. Plasticizers can weaken intermolecular forces along the polymer chains, thus increasing free volume and lowering the glass transition temperature. For this reason, polymers with plasticizers have improved ductility.
- Why do polymers need plasticizers?
- The plasticizers reduce the glass transition temperature, and the viscosity of the polymer also enhances the flexibility and processability of polymer materials. The main problem of these additives is that, over time, they migrate from the polymeric matrix and exude to the surface of polymeric matrix.
- Do plasticizers reduce intermolecular forces?
- In general, plasticizers reduce intermolecular forces along the polymer chains, thus increasing free volume and chain movements (Immergut and Mark, 1965). The addition of plasticizer lowers the melt viscosity and elastic modulus of the polymers and decreases the glass transition temperature (Tg) (Han and Gennadios, 2005).
- Are plasticizers bad for the environment?
- Plasticizers can weaken intermolecular forces along the polymer chains, thus increasing free volume and lowering the glass transition temperature. For this reason, polymers with plasticizers have improved ductility. Nowadays, there is a growing concern among consumers regarding the detrimental effects of synthetic plastics on the environment.
- Can plasticizers reduce material degradation over time?
- The design of new plasticizers compatible with the polymer at high concentrations, tailored to be effective in lowering the glass transition temperature, and with a low tendency to migration could considerably reduce material degradation over time.
- How is plasticization achieved in polymer morphology?
- Plasticization is achieved by incorporating a plasticizer into polymer matrix, copolymerization, or blending. Among those, adding plasticizer is the most common and simplest way to modify polymer morphology. Plasticizer can lessen the intermolecular forces along the polymer chains. As a result, free volume was increased and T g was lowered.
