Polypropylene/fiberglass composite material and preparation method thereof

Abstract

The invention discloses a polypropylene / fiberglass composite material and a preparation method thereof. The polypropylene / fiberglass composite material is prepared from the following raw materials in parts by weight: 100 parts of polypropylene, 15-50 parts of fiberglass, 5-15 parts of maleic anhydride grafted polypropylene, 0.2-0.5 part of peroxide initiator and 0.5-2 parts of epoxy resin. The preparation method of the polypropylene / fiberglass composite material comprises the steps of: uniformly mixing weighed polypropylene, maleic anhydride grafted polypropylene and the peroxide initiator according to the ratios, adding to the upstream feeding port of a screw extruder at the temperature of 160-230 DEG C and mixing; synchronously carrying out epoxy resin surface coating treatment on the fiberglass, weighing the fiberglass before and after coating, calculating the addition amount of epoxy resin according to the weight difference of the fiberglass before and after coating, introducing to the downstream fiberglass adding port of the screw extruder, and by virtue of the shearing action of the screw extruder, shearing the fiberglass into about 0.2-0.5 mm and uniformly dispersing the fiberglass in a base material; and extruding, drawing and granulating. The material is good in strength, rigidity and impact ductility, simple in process, low in cost and high in production efficiency.

Description

technical field [0001] The present invention relates to the field of material technology, specifically to a polypropylene / glass fiber composite material, and also to a preparation method of the polypropylene / glass fiber composite material. [0002] Background technique [0003] Polypropylene is a nonpolar general-purpose thermoplastic with good processing properties, good comprehensive mechanical properties and relatively low price, but its hardness, stiffness and notched impact strength are relatively low, which limits its application in many occasions . Fiber reinforcement is usually an effective means of strengthening and stiffening polymer materials. Due to its high strength and low price, glass fibers are widely used in the preparation of polymer composite materials. One of the keys to improving material performance is to use The interface between the matrix material and the fiber produces good bonding. Polypropylene is a widely used thermoplastic polymer material. Al...

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Problems solved by technology

[0003] Polypropylene is a nonpolar general-purpose thermoplastic with good processing properties, good comprehensive mechanical properties and relatively low price, but its hardness, stiffness and notched impact strength are relatively low, which limits its application in many occasions

Fiber reinforcement is usually an effective means of strengthening and stiffening polymer materials. Due to its high strength and low price, glass fibers are widely used in the preparation of polymer composite materials. One of the keys to improving material performance is to use The interface between the matrix material and the fiber produces good bonding. Polypropylene is a widely used thermoplastic polymer material. Although the surface of glass fiber is generally treated with a coupling agent, since polypropylene is a non-polar polymer material , the interfacial bonding strength with glass fiber is poor, even if some anhydride-grafted polypropylene is usually used to improve the interfacial bonding strength, the improvement of the performance of polypropylene by glass fiber modification is still limited

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