Polymer chemically-modified inorganic oxide particles and preparation method thereof, and applications of polymer chemically-modified inorganic oxide particles in laser sensitive materials

Abstract

The present invention relates to the field of laser sensitive materials and polymer composite materials, more particularly to polymer chemically-modified inorganic oxide particles and a preparation method thereof, and applications of the polymer chemically-modified inorganic oxide particles in laser sensitive materials. The preparation method comprises: grafting a polymer chain having controlled molecular weight and controlled sequence structure on the surface of inorganic laser sensitive oxide particles (P) through active atom transfer radical polymerization, wherein the polymer chain comprises a chain segment (A) with characteristics of easy carbon forming and high residual carbon content and a chain segment (B) with an effect of interface compatibilization; and adding the modified inorganic oxide particles to polyolefin or a polyolefin blending material with poor laser energy sensitivity to prepare the laser sensitive material. According to the present invention, with the application of neodymium-yttrium-aluminum-doped garnet (Nd:YAG) laser device having a wavelength of 1064 nm to carry out laser labeling on the laser sensitive material, the results show that the modified inorganic oxide particles can improve the laser sensitivity of the polyolefin material, and have excellent mechanical properties.

Description

technical field [0001] The invention belongs to the field of laser sensitive materials and polymer composite materials, and in particular relates to a highly efficient polymer chemically modified inorganic oxide particle and a preparation method and application thereof. Background technique [0002] Laser marking is the second largest field of laser industrial application after laser cutting. As a modern precision processing method, laser marking has unparalleled advantages compared with traditional marking methods such as ink printing, and the most important thing is that it will not pollute the environment. The laser used for laser marking has high flexibility and high reliability, so it is widely used in various fields such as metals, ceramics, and clothing. Among them, the Nd:YAG laser with a laser wavelength of 1064nm is ideal for metal and plastic marking, and is one of the most widely used lasers in laser medical treatment and laser processing. [0003] Polypropylen...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the difficulty in laser marking of polyolefin materials such as polypropylene in the prior art, inorganic oxide particles are used as laser marking additives to be added directly into the polyolefin matrix, which may cause uneven dispersion and easy agglomeration, which will affect the laser marking effect, while physically coated The method will cause uneven coating on the surface of the particles, and the polymer chains that are prone to carbon formation are prone to structural changes when they are melted and added to the polyolefin matrix material, which affects the technical problems of the laser marking effect

Under the irradiation of a 1064nm wavelength laser, the inorganic particles absorb the laser energy and undergo photothermal conversion, which promotes the rapid high-temperature carbonization and blackening of the easily carbonized polymer chains chemically combined with the particles, and finally makes the carbonization rate of the polyolefin matrix higher, thus effectively Improves the laser marking performance of polyolefin materials, and at the same time solves the problem of poor dispersion and easy agglomeration of directly adding inorganic oxide particle laser sensitizers

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