Preparation method of POSS modified polysiloxane rubber composite material

A technology of polysiloxane and composite materials, which is applied in the field of functional polymer materials and nanocomposite materials, can solve the problems of POSS modified high-temperature vulcanized silicone rubber and other problems, so as to avoid a large amount of solvent recovery, broaden the application range, and avoid molecular weight The effect of the restriction

Active Publication Date: 2014-06-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many reports on POSS modified polymers, but there are few reports on the successful preparation of POSS mod

Method used

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  • Preparation method of POSS modified polysiloxane rubber composite material
  • Preparation method of POSS modified polysiloxane rubber composite material
  • Preparation method of POSS modified polysiloxane rubber composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0065] This embodiment is the preparation of POSS as the POSS modified polysiloxane rubber composite material of pendant chain

[0066] Add 5g of monohydroheptaphenyl POSS and 10g of vinyl silicone oil (vinyl content: 3wt%, molecular weight: 300,000) into a 100mL three-necked bottle equipped with a condenser. Under the protection of nitrogen, inject 60mL of toluene into the three-neck flask, start stirring, after heating to reflux temperature, add 8ul of Pt (dvs), and reflux for 72h until the reaction is complete. The solvent is removed from the obtained product to obtain a POSS-modified polysiloxane oligomer in which the POSS is located in the polysiloxane side chain.

[0067] Take 10g of the above-mentioned POSS modified polysiloxane oligomer and 50g of polydimethylvinylsiloxane body (molecular weight: 200,000, vinyl content: 0.15mol%), 6g hydrogen-containing silicone oil (hydrogen content: 0.5wt%) , molecular weight 3000g.mol -1 ) at 100-120°C for banburying, then mix the...

Embodiment 2

[0069] This embodiment is the preparation of POSS as the POSS modified polysiloxane rubber composite material of pendant chain

[0070] Add 10g of monohydroheptaphenyl POSS and 10g of vinyl silicone oil (vinyl content 5wt%, molecular weight 30,000) into a 250mL three-necked bottle equipped with a condenser. Under the protection of nitrogen, inject 180mL of toluene into the three-neck flask, start stirring, after heating to reflux temperature, add 18ul of Pt (dvs), and reflux for 48h until the reaction is complete. The solvent is removed from the obtained product to obtain a POSS-modified polysiloxane oligomer in which the POSS is located in the polysiloxane side chain.

[0071] Take 10g of the above-mentioned POSS modified polysiloxane oligomer and 50g of polydimethylvinylsiloxane body (molecular weight is 400,000, vinyl content is 0.18mol%), 2g hydrogen-containing silicone oil (hydrogen content is 0.5%, Molecular weight 3000g.mol -1 ) at 100-120°C for internal mixing, then ...

Embodiment 3

[0073] This embodiment is the preparation of POSS as the POSS modified polysiloxane rubber composite material of pendant chain

[0074] Mix 20g monohydroheptaphenyl POSS with 10g vinyl silicone oil (vinyl content 10wt%, molecular weight 3000g.mol -1 ) into a 500mL three-necked bottle equipped with a condenser. Under the protection of nitrogen, inject 300mL of toluene into the three-neck flask, start stirring, after heating to reflux temperature, add 40ul of Pt (dvs), and reflux for 72h until the reaction is complete. The solvent is removed from the obtained product to obtain a POSS-modified polysiloxane oligomer in which the POSS is located in the polysiloxane side chain.

[0075] Take 10g of the above-mentioned POSS modified polysiloxane oligomer and 50g of polydimethylvinylsiloxane body (molecular weight is 600,000, vinyl content is 0.20mol%), and 10g of white carbon black, 0.05g of double 5. Mix evenly on double rollers, and finally put the blended mixture into a mold coa...

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Abstract

The invention discloses a preparation method of a POSS (Polyhedral Oligomeric Silsesquioxane) modified polysiloxane rubber composite material. The preparation method is characterized in that the POSS containing single/double reactive functional groups is introduced into a polysiloxane molecular chain containing a plurality of reactive functional groups by virtue of grafting or blocking in a chemical copolymerization manner, and then a POSS modified polysiloxane oligomer with the POSS as a polysiloxane hanging chain and the POSS as a polysiloxane block chain, next, 0.1-100 parts of POSS modified polysiloxane oligomer is evenly dispersed in 100 parts of polysiloxane raw rubber by virtue of physical blending, and finally, 0-50 parts of white carbon black and 0.2-10 parts of a curing agent are added to the mixture for cross-linking and solidification and then the POSS modified polysiloxane rubber composite material is obtained. The POSS modified polysiloxane rubber composite material has excellent high and low temperature resistance, mechanical properties and dielectric property, and can be applied to the technical fields of automobiles, electronics, building materials as well as national defense and aerospace.

Description

technical field [0001] The invention relates to a preparation method of a POSS modified polysiloxane rubber composite material, which belongs to the field of functional polymer materials and nanocomposite materials. Background technique [0002] Cage oligomeric silsesquioxane (POSS) is a class of molecular-level hollow cage nano-compounds with a diameter of 1-3nm composed of inorganic Si-O framework and peripheral organic groups. The organic-inorganic nano hollow cage structure integrates the excellent properties of nanomaterials, organic polymer materials and inorganic materials. The designability of its molecules and the high reactivity of functional groups make POSS composites have great potential for bottom-level design. It has broad application prospects in many fields such as space materials, optoelectronic materials, biomedicine, and catalysts. At present, the synthesis methods of POSS mainly include hydrolysis condensation method, missing angle ring closure method, ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/06C08L83/04C08K5/549C08K3/36C08G77/38
Inventor 黄光速刘玉峰张典石芸慧郑静吴锦荣
Owner SICHUAN UNIV
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