The process of wet surface modification of nano-magnesium hydroxide was mainly studied, and the oxygen index, tensile strength and elongation at break of the system were determined by adding the powder before and after modification to the soft PVC system, and the comparison with the common magnesium hydroxide powder was also carried out.
The experimental results showed that the best modifier was zinc stearate, the modification time was 0.5h, the modification temperature was 85℃, and the amount of modifier was 5% (mass fraction); the modified nano-magnesium hydroxide powder improved the flame retardancy of the soft PVC system than the common magnesium hydroxide and unmodified nano-magnesium hydroxide powder and reduced the effect on the mechanical properties of the system.
The surface properties of nano-magnesium hydroxide were evaluated by BET, settling speed, oil absorption value and viscosity before and after modification, and the flame retardant and mechanical properties of the system were measured by applying the modified powder to the soft PVC system.
The experimental results showed that...
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