flexibleizers

Flexibleizers are a class of chemical additives used to increase the flexibility and reduce the brittleness of polymers. They are also commonly referred to as plasticizers. These substances work by embedding themselves between polymer chains, reducing the intermolecular forces and allowing the chains to move more freely relative to each other. This increased molecular mobility directly translates to a more flexible and less rigid material.

The effectiveness of a flexibleizer depends on its compatibility with the polymer. A good flexibleizer will remain in the polymer matrix over time without migrating out or evaporating. Common flexibleizers are typically organic compounds with low volatility and high boiling points. Phthalates, such as dioctyl phthalate (DOP), have historically been widely used flexibleizers, particularly in polyvinyl chloride (PVC). However, concerns regarding their potential health and environmental impacts have led to the development and increased use of alternative flexibleizers.

Other types of flexibleizers include adipates, citrates, sebacates, and polymeric flexibleizers. Polymeric flexibleizers are longer-chain molecules that are less prone to migration, making them suitable for applications requiring high permanence and durability. The choice of flexibleizer is critical and depends on the specific polymer, the desired properties of the final product, and regulatory requirements. Applications range from flexible PVC products like cables, flooring, and medical devices to coatings, adhesives, and sealants.