Fundamentals of plasticizers | ExxonMobil Product Solutions
Plasticizers transform the properties of PVC to create the attributes we need in each application. Most PVC applications have a life-span of 10 to 20 years and beyond. Its long life-span makes PVC the perfect material for applications like building and construction. What is PVC? PVC has all the attributes needed to make it a widely used polymer.
Plasticizer
A plasticizer ( UK: plasticiser) is a substance that is added to a material to make it softer and more flexible, to increase its plasticity, to decrease its viscosity, and/or to decrease friction during its handling in manufacture.
Plasticizers: Types, Uses, Classification, Selection & Regulation
Due to its low cost and generally good performance, DEHP is widely employed as a plasticizer in manufacturing articles made of PVC. Melting point: 50°C Boiling point: 250 - 257°C at 0.5 kPa Structure of DEHP DEHP offers good gelling, satisfactory electrical properties and helps to produce highly elastic compounds with reasonable cold strength.
Plasticizers Derived from Biomass Resources: A Short Review - MDPI
Therefore, plasticizers are mainly used to decrease hardness, softening temperature, elastic modulus, and embrittlement temperature of polymers, while improving their flexibility and elongation. Non-phthalate plasticizer alternatives include citric acid ester, phosphates, polyesters, halogenated alkanes, and epoxy compounds [ 4, 5, 6, 7 ].
Plasticizer - an overview | ScienceDirect Topics
Good plasticization involves interspersing plasticizer molecules between PVC chains, breaking the small amount of native PVC crystallinity, and internally lubricating the polymer blend. While there is no formal chemical bond between plasticizer and polymer, the polar attraction between them makes plasticized PVC more than a simple physical mixture.
- What are plasticizers?
- Plasticizers are intermediate chemical products whose properties determine greatly the performance of the products which they are added. It is estimated that in the search for plasticizers to modify rigid polymers, more than 30,000 substances have been tested.
- How do plasticizers affect a polymer?
- Well-chosen plasticizers can also improve resistance to UV exposure and chemical attack. This contributes to the long-term stability of the polymer. In specific applications, plasticizers can influence the dielectric properties of polymers.
- What is plasticization in chemistry?
- The term plasticization refers to the softening and increase in flexibility of a polymer. This change is due to the addition of specific additives, especially plasticizers. A plasticizer is a non-volatile substance incorporated in a plastic or elastomer. It changes the thermal and mechanical properties of the material.
- What is plasticizer efficiency?
- Plasticizer efficiency denotes a plasticizer's capacity to impart softness to the product. It is quantified as a ratio of the slope in the hardness-versus-plasticizer-concentration relationship. This correlation expressed in phr (parts per hundred resin), is depicted in Figure 4. Several types of plasticizers mentioned in the graph include:
- What factors affect plasticizer efficiency?
- Internal mobility (flexibility): This parameter plays a crucial role in determining plasticizer efficiency. This is true for various polymers unless polymer crystallinity is involved. The reduction of Tg is proportional to the temperature difference between the Tg of the polymer and plasticizer.
- What happens if the forces between plasticizer molecules exceed plasticizer-polymer interactions?
- If the forces between plasticizer molecules exceed plasticizer-polymer interactions, no plasticization happens. For example, as observed with glycerol and PVC. Polar groups on flexible aliphatic chains also improve plasticization than stiff aromatic chains. The increased mobility of aliphatic groups enables more effective plasticization.
