Light/heat double crosslinked hyperbranched polycarbosilane benzocyclobutene resin and preparation method thereof

Abstract

The invention discloses light/heat double crosslinked hyperbranched polycarbosilane benzocyclobutene resin as shown in a formula (IV) and a preparation method thereof. The preparation method of the hyperbranched polycarbosilane benzocyclobutene resin comprises the following steps: generating a Grignard reagent from chloromethyltrichlorosilane under the action of magnesium; then performing a coupling reaction with Si-Cl to further form a hyperbranched Si-Cl bond-containing hyperbranched polycarbosilane polymer; adding 4-bromobenzocyclobutene to react; adding p-bromostyrene to react; then adding alkyl (alkenyl) halide to react; performing cooling; adding distilled water (deionized water) into the system for a quenching reaction; and performing solvent extraction, concentration, and purification steps such as distillation or column chromatography on silica gel to obtain the light/heat double crosslinked hyperbranched polycarbosilane benzocyclobutene resin. The light/heat double crosslinked hyperbranched polycarbosilane benzocyclobutene resin prepared by the method is excellent in thermal, electrical and photosensitive properties and is suitable for being used as a high performance dielectric film material or a packaging material in the field of microelectronics industry, space flight and aviation and national defense and the like. The formula (IV) is as shown in the specification.

Description

technical field [0001] The invention belongs to an organic polymer compound and preparation thereof, and relates to a hyperbranched polycarbosilane benzocyclobutene resin capable of double-crosslinking by light and heat and a preparation method thereof; The hyperbranched polycarbosilane benzocyclobutene resin has excellent thermal, electrical and photosensitive properties, and is suitable for use as a high-performance dielectric film material or packaging material in the fields of microelectronics, aerospace, and national defense. Background technique [0002] In the prior art, polycarbosilane (PCS for short) is an organosilicon polymer formed by elements such as Si, C, H, etc., the molecular chain is linear or branched structure, and has high temperature resistance (up to 400 ° C or more), It has excellent properties such as low dielectric (dielectric constant can be as low as 2.5) and moisture absorption resistance. Hyperbranched polycarbosilane is an important type of po...

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Problems solved by technology

[0003] Benzocyclobutene resin has excellent properties such as heat resistance, dielectric, moisture absorption resistance, and film flatness. Various benzocyclobutene silicone polymers and their preparation methods have been reported in the literature, such as: US5882836, US5138081, ZL201110367893.X, ZL201110367900.6, etc. reported several polysiloxane-type benzocyclobutene silicone resins; literature [Journal of Polymer Science, Part A: Polymer Chemistry, 2011,49,381-391], [Polymer,2014,55,5680-5688], [Polymer,2015,66,58-66] reported a class of polycarbosilane benzocyclobutene resins, all of which showed excellent thermal, electrical and film-forming properties. However, the preparation process of the above materials is cumbersome, the yield is not high, and the material properties are greatly affected by the preparation process, which greatly limits their further wide application.

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