Modified nano-microsphere, PC/PET composite material and preparation method of modified nano-microsphere and PC/PET composite material

Abstract

The invention provides a modified nano microsphere, a PC / PET composite material and a preparation method thereof, and belongs to the technical field of nano materials and high polymer materials, the modified nano microsphere, the PC / PET composite material is prepared from the following raw materials by weight: 60-80 parts of PC, 12-32 parts of PET, 0.5-2 parts of a composite compatibilizer, 0.1-0.3 part of a transparent agent, and 0-0.5 part of an antioxidant; the composite compatilizer comprises modified silicon dioxide / polydopamine / polystyrene porous hollow nano microspheres and maleic anhydride grafted polyethylene, and the mass ratio of the modified silicon dioxide / polydopamine / polystyrene porous hollow nano microspheres to the maleic anhydride grafted polyethylene is (3-5): 7. The PC / PET composite material provided by the invention has high transparency, high mechanical properties, better oil resistance, solvent resistance, heat resistance and the like, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of nanomaterials and polymer materials, in particular to a PC / PET composite material containing modified nanometer microspheres and a preparation method thereof. Background technique [0002] PC (polycarbonate) has excellent transparency, mechanical strength and thermal stability, and is one of the five general engineering plastics. However, PC has the disadvantages of high melt viscosity, difficult molding and processing, and not resistant to oil and solvents. PET (polyethylene terephthalate) is a crystalline material with excellent oil resistance and solvent resistance. However, when PET is used alone, it has disadvantages such as poor heat resistance and low mechanical strength. And because PET resin is a crystalline polymer and PC resin is an amorphous polymer, the compatibility between the two is not good, and the mixing of the two will also lead to a decrease in the mechanical properties of the compos...

AI Technical Summary

Problems solved by technology

However, PC has disadvantages such as high melt viscosity, difficult molding and processing, and is not resistant to oil and solvents.

PET (polyethylene terephthalate) is a crystalline material with excellent oil resistance and solvent resistance. However, when PET is used alone, it has disadvantages such as poor heat resistance and low mechanical strength.

And because PET resin is a crystalline polymer and PC resin is an amorphous polymer, the compatibility between the two is not good, and the mixing of the two will also lead to a decrease in the mechanical properties of the composite material.

In addition, because the PC resin contains terminal hydroxyl groups, it will react with the residual carboxyl and hydroxyl groups in the PET resin in the presence of titanium-based residual catalysts at high temperatures. Although this two-phase reaction can improve the compatibility of the two, it also There is a lot of uncertainty, and the reaction will also cause a sharp deterioration in the performance of the composite material in the later use process, greatly reducing the practicability of the PC / PET composite material

In order to solve the above-mentioned technical problems, there are technical personnel in the prior art to use styrene-acrylonitrile-glycidyl methacrylate as a chain extender, and the toughness and stability of the PC / PET composition obtained are all improved, but the chain extension The addition of additives will affect the fluidity and gloss of the composite material, which limits its popularization and application.

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