Winding-used resin with high NOL ring tensile strength

Abstract

The invention discloses winding-used resin with high NOL ring tensile strength. The resin system comprises the following raw materials in parts by weight: 100 parts of epoxy resin, 60-90 parts of a curing agent, 0-5 parts of an accelerator and 0-5 parts of a coupling agent. In the invention, a silane coupling agent is introduced into the resin system and is a type of organosilicon compounds with molecules containing inorganic and organic groups simultaneously, so that a 'molecular bridge' is erected between an interface of a carbon fiber which is an inorganic matter and an interface of epoxy resin which is an organic matter, and the two materials with intervallic properties are connected with each other, so that the property of a composite material is improved. The NOL ring tensile strength of the prepared resin can achieve the comparatively high level of the industry, is higher than that in documentary records by about 20% and can reach 3,000 MPa or higher.

Description

technical field [0001] The invention relates to a resin suitable for winding technology, in particular to a winding resin with high tensile strength of NOL rings. Background technique [0002] Among many composite material molding processes, fiber wet winding is a continuous fiber bundle impregnated with resin, which is precisely wound on a rotating mandrel according to a predetermined path under tension control, cured according to a certain specification, and demolded after curing. Filament winding has the advantages of maintaining fiber continuity and exerting fiber integrity for barrel-shaped parts, such as various pressure vessels. At the same time, filament winding molding technology can better realize the combination of low cost and high efficiency, and has become an important molding method for composite materials, and is widely used in the fields of aerospace and weapons. The test of the tensile strength of the NOL ring can well simulate the state of the barrel subj...

AI Technical Summary

Problems solved by technology

[0004] ①Under high tension winding, the resin volume content of the NOL ring produced by the winding process is lower than that of other molding processes, generally below 35%. With such a small resin content, the resin cannot protect the fiber well during the test process. The fiber cannot be stressed as a whole at the same time, so the test value is low;

[0005] ② Carbon fiber is an inorganic material, and epoxy resin is an organic material. When the two are combined, they cannot form a good interface, resulting in low test results