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Biomedical polyurethanes and long-term implantable silicone polyurethane copolymers
In most polymers, aromatic diisocyanates (MDI) are used to form hard segments. While they may be easier to extrude and mould, polymers based on cycloaliphatic analogues
2023/09/04
View DetailsUV absorbers are a class of substances that prevent degradation of polymers caused by sunlight or other man-made ultraviolet light, and are a type of light stabiliser. Because the sun's rays contain a large number of harmful ultraviolet light to coloured objects
2023/09/27
Z-302 dispersant applied to graphene dispersion
Regardless of the method of dispersion, the dispersant provides superior compatibility.
2023/09/27
The reason why ultraviolet absorbers can absorb ultraviolet light is due to the fact that the molecules of such compounds contain the structure of the conjugated π-electron
2023/09/27
Classification and role of ultraviolet absorbers
According to the chemical structure, UV absorbers can be classified into salicylates, phenyl ketones, benzotriazoles, substituted acrylonitrile, triazines and hindered amines. Benzotriazoles
2023/09/27
Potential importance of purity/non-ether contaminants
General trends exist between the different classes of polyurethane copolymers. The contributions of the hard and soft chain segments can be easily adjusted by compositional changes during synthesis and usually vary monotonically until a transition point is encountered.
2023/09/26
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