Method for increasing heat distortion temperature of polyolefin, polyolefin composite material obtained therefrom and application thereof

Abstract

The invention provides a method for increasing the heat distortion temperature of polyolefin and the obtained polyolefin composite material and its application. Zirconium hydrogen phosphate is used to increase the heat distortion temperature of non-polar polyolefin. The present invention finds that adding zirconium hydrogen phosphate to non-polar polyolefin can significantly increase its heat distortion temperature and increase its heat resistance.

Description

technical field [0001] The invention belongs to the technical field of modification, and relates to a method for increasing the thermal deformation temperature of polyolefin, a polyolefin composite material obtained therefrom and an application thereof. Background technique [0002] Polyolefins are α-olefins such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 4-methyl-1-pentene, etc., and some cycloolefins are polymerized or co-polymerized. The general term for a class of thermoplastic resins obtained by polymerization. Due to abundant raw materials, low price, easy processing and excellent comprehensive performance, it is a class of polymer materials with the largest output and wide application. Among them, polyethylene (PE) and polyethylene Propylene (PP) is most important. However, the heat resistance of this kind of material is poor, which limits its application in some high temperature environments. [0003] At present, most of the technologies use b...

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Problems solved by technology

However, the heat resistance of this kind of material is poor, which limits its application in some high temperature environments.

[0003] At present, most of the technologies use blending or grafting modification to enhance the heat resistance of polyolefins, organically blending them with organic polymers with better thermal stability (such as polyphenylene ether, polystyrene, etc.) ) blending to improve heat resistance, CN105440547A discloses a high-strength heat-resistant polyethylene pipe, its raw materials include the following components in parts by weight: 50-75 parts of vinylsilane grafted high-density polyethylene, linear low-density polyethylene 10-25 parts of ethylene, 5-15 parts of titanium-containing silicone resin, 5-12 parts of maleic anhydride grafted polyphenylene ether, 2-12 parts of polyphenylsulfone phosphate, 0.2-1 tert-butyl alcohol peroxide 2-10 parts of ferric oxide, 2-5 parts of barium sulfate, 1-5 parts of aluminum hydroxide, 5-15 parts of modified nano-titanium dioxide, 2-5 parts of calcium silicate whiskers, 3-10 parts of nano-carbon fiber 0.2-1.5 parts of polyethylene oxide, 0.3-1.5 parts of glycerin monostearate, 0.2-1.2 parts of ethylene bis-stearamide, 0.5-2 parts of antioxidant, which has good heat resistance and high strength , but the composition is too complex, which has a great impact on the processing performance of polyethylene and increases the production cost

CN106146756A discloses a simple graphene-grafted polyolefin method, wherein the polyolefin is modified by reducing graphene oxide so that it has functional groups, which can be well applied, but the modification method is too complicated, Not suitable for large-scale industrial production

Commonly used inorganic nanofillers are represented by montmorillonite (MMT), which is widely used in the polymer material industry as an additive to polymer materials; one-dimensional materials represented by carbon nanotubes and two-dimensional materials represented by graphene Dimensional nanomaterials are also well applied in reinforcing resins, but due to the lack of polar groups and functional groups in non-polar polyolefins, inorganic nanofillers represented by montmorillonite cannot be used very well. Dispersed in polyolefin materials, and has very little effect on the improvement of polyolefin heat resistance. The same problem exists for carbon nanotubes and graphene. Since non-polar polyolefin materials do not contain polar groups, nanofillers Dispersion in the matrix is ​​not good and does little to improve its heat resistance

[0005] At present, it is necessary to develop a method that can improve the heat resistance of non-polar polyolefin molecules to solve the problem of poor heat resistance of polyolefins and expand the application of polyolefins

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