Plasticiser loss from plastic or rubber products through
Plasticisers are commonly added to polymers to lower their glass transition temperature and increase their processability, mechanical flexibility, ductility and toughness. 1, 2, 3, 4, 5 They...
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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]
Plasticizer - an overview | ScienceDirect Topics
Plasticization refers to the modification in thermal and mechanical properties of a given polymer. 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.
Plasticizer - an overview | ScienceDirect Topics
Plasticizers and polymer are thoroughly mixed in molten sate and then desired objects are formed. Plasticization does not create chemical bonds; bonding of the plasticizer additive to the polymer chain could greatly reduce the additive’s effectiveness to plasticize.
- 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.
- What happens when plasticizers are added to polymers?
- When plasticizers added to polymers do not lead to chemical bonding, the process is referred to as external plasticization. Polymer molecules used to achieve internal plasticization are either copolymerized into the polymer structure or reacted with the original polymer.
- How does plasticizer affect the mobility of a polymer chain?
- The mobility of a polymer chain is more complex in the presence of plasticizer than what the Flory–Fox equation predicts for a simple polymer chain. 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.
- What are the intermolecular forces between a plasticizer and a polymer?
- The primary role of a plasticizer is to insert itself between polymer chains. But, the attractive forces between polymer molecules pose a significant challenge. The chemical and physical structure of the polymer influences these forces. Considering the intermolecular forces between plasticizer and polymer is essential.
- Why is plasticization important for commercial polymers?
- Commercial polymers are very commonly tailored by plasticization. Plasticization augments plastic elongation and reduces brittleness. It also lowers the processing temperature, reduces sticking in molds, and enhances wetting. Plasticization is achieved by incorporating a plasticizer into polymer matrix, copolymerization, or blending.
- What are plasticizers & how do they work?
- Plasticizers are additives that increase the flexibility of materials. They produce flow at lower temperatures, thus decreasing processing temperatures. In general, plasticizers reduce intermolecular forces along the polymer chains, thus increasing free volume and chain movements (Immergut and Mark, 1965).
