Flame-retardant enhanced-type polypropylene composite material and preparing method thereof

Abstract

Disclosed are an flame-retardant enhanced-type polypropylene composite material and a preparing method thereof. The flame-retardant enhanced-type polypropylene composite material is prepared from a polypropylene matrix, carbon nanotube modified master batch, a potassium titanate crystal whisker, a composite fire retardant, modified filler, a compatilizer and an antioxidant, wherein the carbon nanotube modified master batch is prepared through the mixed melting of the polypropylene matrix and multiwall-carbon nanotube according to a weight ratio of 10-15:1, the composite fire retardant is a nitrogen-phosphorous composite fire retardant, through the interaction of the nitrogen-phosphorous composite fire retardant and the multiwall-carbon nanotube, a combustion decomposition product of the polypropylene composite material can generate a compact, and continuously stable char layer; meanwhile, two-mechanical melt blending of the multi-walled carbon nanotube are adopted so that the multiwall-carbon nanotube can be fully dispersed in the polypropylene matrix, and two-mechanical melt blending of the multi-walled carbon nanotube are adopted. According to the flame-retardant enhanced-type polypropylene composite material and the preparing method thereof, the operation technology is simple, the added filler causes no pollution to the environment, and thus the flame-retardant enhanced-type polypropylene composite material is environmentally friendly.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, in particular to a flame-retardant reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] As a general-purpose thermoplastic, polypropylene is polymerized from propylene monomer. Because of its low density, easy processing, non-toxicity, good mechanical properties, fatigue resistance and stress crack resistance, it can be recycled and reused. , so it has a wide range of applications in the automotive industry, electrical industry, daily necessities and packaging industries. However, polypropylene has a large shrinkage rate, is easy to scratch the surface, is easy to age, and is easy to burn when exposed to fire. During the combustion process, the flame drops and a large amount of black smoke is released, and its molecular chain contains methyl groups, which increases the rigidity of the entire molecular chain and reduces its Impact p...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the low efficiency of flame retardancy and reinforcement of polypropylene composite materials in the prior art, or the problem that the dual-functional characteristics of flame retardancy and reinforcement cannot be simultaneously provided, and to provide a polypropylene composite material through modified fillers, carbon nanotubes, additives and Combination and synergy of flame retardants, and then propose a flame-retardant reinforced polypropylene composite material and its preparation method

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