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Plastic stabilizer used up
by：CSSSLD
2021-01-23
Light stabilizer is a kind of can prevent or delay the polymer light oxidation degradation reaction of inorganic or organic small molecule.
Polymer in under the irradiation of the sunlight, easy to absorb ultraviolet light, automatic oxidation reaction, make large molecules polymer chain rupture, become the light aging.
Light aging discoloring the injection molding products processing, serious when performance degradation.
uv light, the light of the sun is bad for polymer to ultraviolet light. Because of the ozone layer, water and dust absorption and diffusion, below 290 nm wavelength ultraviolet ray can be fully absorbed, reach the earth's ultraviolet ray is 290 - 400 nm wavelength range. Uv energy is very big, it can match with polymer in some key, so as the main culprit of macromolecular chain.
the mechanism of the light stabilizer according to its function hierarchy classification, can be divided into the following points:
1. The role of ultraviolet screening agent, this kind of light stabilizer way to reflect ultraviolet ray, so that it is not into the polymer in the body. 2. Uv absorber, this kind of light stabilizer can selectively absorb ultraviolet, enter the body of a polymer and can pass the ability to transfer to harmful harmless light energy into light energy, finally in the form of heat release. 3. Uv matting agent, its function is to excited state molecules by ultraviolet light energy that inspired it through the ability to transfer, make excited little while hunting ground state, prevent the excited state trigger light oxidation reaction. 4. Free radical catching agent, this kind of light stability mechanism for the uv energy cause and light oxidation reaction of free radical elimination, eliminate active reflex point, ending has triggered automatically oxidation reaction; Specific role way to capture free radicals and decomposition of hydrogen peroxide.
light screening agent is a kind of reflect ultraviolet ray, prevent ultraviolet penetration to the inside of polymer and cause light oxidation degradation of the material. The disadvantage of light screening agent is to make injection molding processing products coloring, cannot be applied in the transparent plastic products.
uv quenching agent main function is to eliminate the excited polymer molecules, make it back to the ground state, therefore, also known as matting agent. Specific varieties mainly for cobalt complex, of which the organic sulfur part, generation of bisphenol a and so on. Quenching agent as a kind of new type of light stabilizer, resin in applications requiring high stability.
free radicals can capture agent as hindered amine, it is a kind of good performance of high efficiency of light stabilizer, and high efficiency of hydrogen peroxide decomposition agent, it in a variety of ways to realize the light stability, its mechanism is still unclear. Hindered amine stabilizer is a kind of rapid development and promising light stabilizer, and the mainstream of light stabilizer.
more wonderful sharing: to change the life of the plastic, click directly.
or copy the link: http://www. csssld。 cn//html/2016/Info_0614/261。 HTML
nantong on plastic products factory's official website: http://www. csssld。 cn//
uv light, the light of the sun is bad for polymer to ultraviolet light. Because of the ozone layer, water and dust absorption and diffusion, below 290 nm wavelength ultraviolet ray can be fully absorbed, reach the earth's ultraviolet ray is 290 - 400 nm wavelength range. Uv energy is very big, it can match with polymer in some key, so as the main culprit of macromolecular chain.
the mechanism of the light stabilizer according to its function hierarchy classification, can be divided into the following points:
1. The role of ultraviolet screening agent, this kind of light stabilizer way to reflect ultraviolet ray, so that it is not into the polymer in the body. 2. Uv absorber, this kind of light stabilizer can selectively absorb ultraviolet, enter the body of a polymer and can pass the ability to transfer to harmful harmless light energy into light energy, finally in the form of heat release. 3. Uv matting agent, its function is to excited state molecules by ultraviolet light energy that inspired it through the ability to transfer, make excited little while hunting ground state, prevent the excited state trigger light oxidation reaction. 4. Free radical catching agent, this kind of light stability mechanism for the uv energy cause and light oxidation reaction of free radical elimination, eliminate active reflex point, ending has triggered automatically oxidation reaction; Specific role way to capture free radicals and decomposition of hydrogen peroxide.
light screening agent is a kind of reflect ultraviolet ray, prevent ultraviolet penetration to the inside of polymer and cause light oxidation degradation of the material. The disadvantage of light screening agent is to make injection molding processing products coloring, cannot be applied in the transparent plastic products.
uv quenching agent main function is to eliminate the excited polymer molecules, make it back to the ground state, therefore, also known as matting agent. Specific varieties mainly for cobalt complex, of which the organic sulfur part, generation of bisphenol a and so on. Quenching agent as a kind of new type of light stabilizer, resin in applications requiring high stability.
free radicals can capture agent as hindered amine, it is a kind of good performance of high efficiency of light stabilizer, and high efficiency of hydrogen peroxide decomposition agent, it in a variety of ways to realize the light stability, its mechanism is still unclear. Hindered amine stabilizer is a kind of rapid development and promising light stabilizer, and the mainstream of light stabilizer.
more wonderful sharing: to change the life of the plastic, click directly.
or copy the link: http://www. csssld。 cn//html/2016/Info_0614/261。 HTML
nantong on plastic products factory's official website: http://www. csssld。 cn//
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