The use of softeners or plasticizers in the processing of reclaimed rubber products can improve the processing technology of reclaimed rubber products. However, the working principle of the two remarkably differs from the target of use. Therefore, the "softening" and "increasing" of reclaimed rubber products. What is the principle of "plastic"? Which kind of recycled rubber products need to add "softeners", and which regenerated rubber products use "plasticizers"?
1, reclaimed rubber softened
The reclaimed rubber softener is a compounding agent with good compatibility with reclaimed rubber, which can improve the reprocessing process of the reclaimed rubber, reduce the power consumption of the mixing, promote the uniform dispersion of the powdery compounding agent in the reclaimed rubber, and improve the technical performance of the vulcanizate. Used in non-polar regenerated rubber. The appropriate amount of softener is added to the reclaimed rubber product. The molecules of these softeners will enter between the internal molecular chains of the reclaimed rubber and randomly distributed among the regenerated rubber macromolecules, so that the distance between the regenerated rubber molecules increases and the intermolecular force decreases. Small, enhanced segmental activity, improved molecular chain flexibility, and reduced glass transition temperature and viscosity of reclaimed rubber.
The essence of rejuvenation softening is that the softening agent plays a role in filling and diluting the regenerated rubber molecules. The softening agents are mostly derived from natural substances, and non-polarity is generally used in the production of non-polar rubber products.
2, reclaimed plastic plastic
Plasticizers are substances that can significantly improve the plasticity of reclaimed rubber in the production of reclaimed rubber products. The plasticizer can reduce the intermolecular forces of the polar regenerated rubber, improve the processing performance of the reclaimed rubber compound, and increase the physical polarity properties of the vulcanizate. Plasticizers are used in polar reclaimed adhesives because polar groups contained in the polar regenerant's molecular structure interact with one another, thereby increasing the interaction between macromolecular segments and reducing macromolecular chains. The flexibility of the segment causes the polar regenerated rubber compound to be difficult to deform under the influence of external forces; the plasticizer is added to the reclaimed rubber compound, the polar group between the plasticizer molecules and the polar group in the reclaimed rubber The group produces a role in shielding the interaction between the polar groups in the regenerated rubber molecules, so that the interaction force between the regenerated rubber molecules decreases, the chain breaking capacity increases, the glass transition temperature decreases, and the plasticity increases.
The nitrile reclaimed rubber in reclaimed rubber products retains most of the molecular structure characteristics of nitrile rubber, which is a polar rubber and generally uses plasticizers; latex reclaimed rubber, EPDM reclaimed rubber, tire reclaimed rubber, and butyl reclaimed rubber Most of the products use softeners. Plasticization of reclaimed rubber products is usually divided in physical plasticization and chemical plasticization. The plasticization we often refer to refers to physical plasticization, and the substance used is a softening plasticizer.
When reclaimed rubber is used to produce rubber products, rubber product manufacturers should select suitable softeners or plasticizers according to the characteristics of reclaimed rubber structures and the performance requirements of rubber products. If necessary, they can also use two or more plasticizers. One of them is used as the main plasticizer and the other is the auxiliary plasticizer to improve the processing technology of reclaimed rubber products, reduce the energy consumption in the mixing of reclaimed rubber products, and improve the indexes of reclaimed rubber products.
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