PC/ABS composite material with high chemical resistance and preparation method thereof

Abstract

The invention provides a PC / ABS composite material with high chemical resistance and a preparation method thereof. The composite material comprises the following components in percentage by weight: 60-85% of polycarbonate; 15-40% of ABS; 0.5-5% of a compatilizer; and 3-10% of a rheology modifier. The preparation method comprises the following steps: mixing the components in the raw materials according to a certain ratio at room temperature, and carrying out melt extrusion through double screws to prepare the PC / ABS composite material which is easy to process, excellent in mechanical propertiesand high in chemical resistance, and the preparation method of the PC / ABS composite material. The prepared composite material is excellent in mechanical property and easy to process, meanwhile, excellent chemical resistance is kept, and the product is excellent in appearance.

Description

technical field [0001] The invention belongs to the field of macromolecules, and in particular relates to a PC / ABS composite material with easy processing, excellent mechanical properties and high chemical resistance and a preparation method thereof. Background technique [0002] PC / ABS combines the comprehensive characteristics of both PC (polycarbonate) and ABS (polyacrylonitrile-butadiene-styrene), which improves fluidity and processing performance compared with PC, and reduces product stress Sensitivity, and has more excellent thermal stability than ABS. Therefore, it can be used in many fields such as household appliances, office equipment, communication equipment, photographic equipment, medical equipment, construction and lighting appliances, aerospace, electronic computers, and optical fibers. Especially in high-strength, high-heat-resistant parts such as automotive interiors, exteriors, and lights, it has been widely used. [0003] In recent years, the PC / ABS mark...

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Problems solved by technology

[0007] However, at present, there is no good solution to solve the solvent resistance problem of PC / ABS, adding chemical-resistant components, such as high crystallinity materials (PBT , PA, etc.) to improve the chemical resistance of the material, but too much addition of the third component will often lead to a decrease in the heat resistance and impact strength of the material; the end-capping method is used to improve the chemical resistance of PC , such as isocyanates, oxazolines, epoxies and dianhydrides

By reacting with the polymer end group by stepwise polymerization, the end group of PC is reduced, thereby improving its chemical resistance, but the problem it brings is the loss of processability. Due to the poor processability of high-viscosity PC, the apparent Poor, its residual internal stress will also become a weak point of chemical resistance, which often needs to increase the processing temperature, resulting in thermal cracking loss

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