High-modulus, high-impact, wear-resistant and heat-resistant intrinsic flame-retardant polydicyclopentadiene engineering material and preparation method thereof

Abstract

The invention discloses a high-modulus, high-impact, wear-resistant and heat-resistant intrinsic flame-retardant polydicyclopentadiene engineering material and a preparation method thereof. The polydicyclopentadiene engineering material is prepared by taking dicyclopentadiene, 5-norbornene-2-formamide, 5-norbornene-2-methanol, a norbornene reactive flame retardant containing amido bonds and a caged phosphate structure, a catalyst and an inhibitor as raw materials through a thermally driven self-propagating technology. Wherein the synthesis method of the norbornene reactive flame retardant containing the amido bond and the caged phosphate structure is simple, the yield is high, and the flame retardant property and the mechanical property of a polydicyclopentadiene material can be improved. The limit oxygen index of the prepared polydicyclopentadiene material reaches 42%, the flame retardant rating can reach UL94V-0 level, the impact strength reaches 90kJ / m < 2 >, the shore hardness exceeds 92HD, the tensile strength reaches 120MPa, the heat distortion temperature reaches 197 DEG C, the abrasion loss is reduced by 92%, and the polydicyclopentadiene material has excellent flame retardant property and mechanical property.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and engineering, in particular to a high-modulus, high-impact, wear-resistant, heat-resistant intrinsic flame-retardant polydicyclopentadiene engineering material, and at the same time to a kind of polydicyclopentadiene containing amide bonds and caged phosphoric acid Norbornene-based reactive flame retardant with ester structure. Background technique [0002] Polydicyclopentadiene is a high-performance thermosetting engineering material, which has the unique advantage of large-area integral molding in the molding process, so it is widely used in the field of large-scale parts manufacturing. However, the all-hydrocarbon composition of polydicyclopentadiene makes it very easy to burn, and because its structure contains a large number of unsaturated double bonds, a large amount of smoke and toxic gases are generated during the combustion process, which limits polydicyclopentadiene. The ap...

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Problems solved by technology

In the CN102690483B patent, it is proposed to prepare a flame-retardant polydicyclopentadiene composite material by blending antimony trioxide, acrylate monomers and dicyclopentadiene. The impact strength of the prepared material is increased by 25%, but the limiting oxygen index is only up to 24%, the improvement of flame retardant performance is not obvious

In CN104558326A and CN 104592301 A patents, researchers prepared dicyclopentadienyl hexachlorocyclotriphosphazene flame retardant and norbornenyl hexachlorocyclotriphosphazene flame retardant respectively, and combined them with dicyclopentadiene The flame-retardant polydicyclopentadiene composite material was prepared by copolymerization of ethylene, and the oxygen index of the prepared material reached 29.4% and 28.7%, respectively, but the strength, modulus and toughness of the material still need to be further improved, and the wear resistance of the material is not involved. At the same time, flame retardants containing halogens are restricted in the promotion and application of modern industries, and cannot be applied under high-end and strict requirements

In general, the flame retardant strategy proposed by the existing patents cannot achieve high modulus, high impact, and wear resistance of the material while improving the flame retardant performance of polydicyclopentadiene, and the flame retardant performance still needs to be further improved. To make it meet the application of polydicyclopentadiene engineering materials in harsh environments such as high-voltage battery pack casings for new energy vehicles, high-speed train cable joints, and automotive engine support frames

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