The synthesis and modification techniques of high-temperature resistant silicone resin are key to enhancing its performance and expanding its applications. This article will provide a detailed introduction to the synthesis methods, modification strategies, and performance changes after modification of high-temperature resistant silicone resin.

I. Synthesis Methods

1. Polycondensation Reaction: Silicon resin with a three-dimensional network structure is formed through the polycondensation reaction between silane monomers. Common silane monomers include methyltriethoxysilane, dimethyldiethoxysilane, etc. The molecular weight and crosslinking density of the product can be adjusted by controlling reaction conditions (such as temperature and catalyst type).

2. Addition Polymerization: Linear or lightly crosslinked silicone resin is obtained by addition polymerization of silane monomers containing vinyl or hydride groups under the action of a platinum catalyst. This method can produce silicone resin with low viscosity and ease of processing.

II. Modification Strategies

1. Inorganic Nanoparticle Filling: Uniform dispersion of inorganic nanoparticles such as alumina and silica in the silicone resin matrix can significantly improve the material's thermal conductivity, mechanical strength, and wear resistance.

2. Organic/Inorganic Hybridization: Combining organic polymer chains with inorganic silicate networks through chemical bonding forms hybrid materials that maintain the flexibility of silicone resin while enhancing its heat resistance and mechanical properties.

3. Functional Modification: Introducing specific functional groups (such as amino, carboxyl, hydroxyl, etc.) imparts new functional characteristics to silicone resin, such as self-healing ability and biocompatibility.

III. Performance Changes After Modification

After the above modification treatments, the thermal stability, mechanical properties, and weather resistance of high-temperature resistant silicone resin are significantly improved. For example, the addition of inorganic nanoparticles not only enhances thermal conductivity but also increases material hardness and wear resistance; organic/inorganic hybridization allows the material to maintain high flexibility while possessing higher thermal shock resistance; functional modification, depending on the functional groups introduced, imparts specific application characteristics to the material.

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