Carbon fiber winding is a continuous molding method of composite materials, which is to wind continuous fibers or fabrics impregnated with resin glue on a core mold according to a certain rule, and then solidify and demold into composite products.
Commonly used matrix resins for wet winding mainly include unsaturated polyester and epoxy resin. These resins are required to possess a certain viscosity and a long pot life at room temperature or work temperature. Resin cast body and carbon fiber composite must have good mechanical property and heat resistance.
S-186 is a trifunctional epoxy resin with one alicyclic epoxy group and two glycidyl ester groups in its molecular structure.
● 耐高温 150-200℃
Resistant to high temperature of 150-200℃
The resin S-186 has overcome the disadvantages of bisphenol A epoxy resins, including poor weatherability, poor anti-shock performance and so on. It can be used in production of high-performance composite materials.
Due to its quite active glycidyl ester group, the resin S-186 has higher reactivity than ordinary cycloaliphatic epoxy resin, which can overcome the shortcomings of most cycloaliphatic epoxy resins such as low reactivity to aliphatic amines, almost non-curing effect on imidazole and tertiary amines. Therefore, the resin S-186 can be cured both by anhydrides and amines.
Curing reaction mechanism: In the absence of a catalyst, even if the temperature is as high as 200°C, the reaction between epoxy group and acid anhydride is very slow. The acid anhydride can react with hydroxyl group in the system for curing bisphenol A epoxy resin. The curing speed is proportional to the concentration of hydroxyl group.
A catalyst must be added into the system when S-186 reacts with tetrahydrophthalic anhydride. Aniline can be added into the system as an accelerator to react with acid anhydride to generate acyl derivatives and carboxyl groups. The carboxyl group can react with the epoxy group to form a secondary alcohol, and a hydroxyl group is introduced into the system to achieve the purpose of accelerating the reaction.
Curing reaction mechanism: It is cold-cured with aliphatic amine at room temperature. Due to the induction effect, it is vulnerable to the attack of "amines" as nucleophiles, but the reaction of S-186 with aliphatic amines is much milder than that of bisphenol A type.
For the S-186/DDS system, prepare the pouring body according to the determined process and then test its various properties. At the same time, compare it with CYD-128/DDS system. It can be seen from the table that the performance of the S-186/DDS system is far higher than that of the CYD-128/DDS system.
S-186/DDS/S-GF (reinforced material) composite material performance
Filament winding technology can give full play to its characteristics of high specific strength, high specific modulus and low density. It can be used in national defense and civil fields such as pressure vessels, large storage tanks, high-pressure pipelines, rocket engine shells, etc.
Hydrogen energy is the most promising new energy source in the 21st century. It has the advantages of high efficiency, environmental protection and renewable energy, but the lagging technology of hydrogen storage and transportation severely limits its large-scale application. The hydrogen cylinder which is made of carbon fiber reinforced composite has broad application prospects in the field of hydrogen storage, because it has advantages of light weight, strong toughness and good fatigue resistance.