Pvpp Enartis 25249-54-1

Pharmacopoeia Name: Crospovidone

Chemical Name: Crospovinylpyrrolidone, PVPP

INCI/CTFA Name: Insoluble PVP

CAS No.: 25249-54-1,9003-39-8

Cross-linked polyethylene is a thermosetting plastic with a mesh structure. It has outstanding wear resistance, solvent resistance, dimensional stability, stress cracking resistance, aging resistance and weather resistance. It is non-toxic, odorless and non-absorbent. It has good low-temperature flexibility and excellent heat resistance. The softening point can reach 200℃ and it can be used for a long time at 140℃. Its impact strength, tensile strength, creep resistance and rigidity are better than HDPE, and its elastic modulus is 5 times higher than HDPE. It has excellent electrical insulation, low-temperature resistance, chemical stability and radiation resistance. Its film has moderate transparency and sufficient water vapor permeability. After heating, inflating (stretching), cooling and shaping, cross-linked polyethylene can naturally return to its original shape and size (i.e., it has shape memory) when it is reheated above the crystallization temperature. Commonly used cross-linked polyethylene in industry are radiation cross-linked polyethylene, peroxide cross-linked polyethylene and silane cross-linked polyethylene. Performance of radiation cross-linked polyethylene film.

Organic peroxide cross-linked polyethylene is different from thermoplastics, thermosetting resins and vulcanized rubber in structure. It has a body structure but is not completely cross-linked. The cross-linked area is very small, unlike vulcanized rubber, which has a large cross-linked network. Therefore, it has the characteristics of the three in terms of performance, that is, it has thermoplasticity, hardness, good solvent resistance, high elasticity and excellent low temperature resistance. Whether it is high-density polyethylene or low-density polyethylene, after cross-linking, its tensile strength, heat resistance, aging resistance and weather resistance, dimensional stability, stress cracking resistance, wear resistance and solvent resistance are all improved, and the creep resistance is excellent. The softening point of cross-linked polyethylene can reach 200℃, and the heat resistance can reach 140℃. In addition, it also has excellent electrical insulation, low temperature resistance and radiation resistance. Performance of peroxide cross-linked polyethylene.

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