Abstract
In the present study,the modified magnesium hydroxide was prepared by precipitation method using Mg(NO3), NaOH, and silane coupling 702 modifier as raw materials. The optimal reaction conditions were obtained as follows: sodium hydroxide was added to magnesium nitrate solution by dropping, the dropping speed of sodium hydroxide was 2ml/min, the reaction temperature was 60℃, and the ratio of modifier dosage to total solution volume was 7/100(g/ml). The oil absorption value and XRD were used to characterize the modified Mg(OH)2. In the application, the modified magnesium hydroxide was mixed with pentaerythritol octahydrogen tetraphosphate(PEPA) and applied to nylon 66(PA66).The flame retardancy and mechanical properties of the nylon 66(PA66)composite were studied.
Highlights
Flame retardant is an important part of daily life, it can be added into the material to improve the flame retardant performance of the material and plays a key role in preventing the occurrence and spread of fire
On the basis of single factor experiment, the reaction temperature, sodium hydroxide drop acceleration and the amount of modifier were selected as factors.The preparation conditions of modified magnesium hydroxide were optimized by orthogonal experiment with three factors and three levels
The crystal structure of the modified magnesium hydroxide was not destroyed by X-ray diffraction (XRD) analysis of the modified magnesium hydroxide
Summary
Flame retardant is an important part of daily life, it can be added into the material to improve the flame retardant performance of the material and plays a key role in preventing the occurrence and spread of fire. There is self-extinguishing , heat resistance and fire resistance after the flame retardant has been added. Flame retardants are being used in more and more fields such as construction, textiles, transportation, aerospace, electronics, plastic materials, etc.[1]. Magnesium hydroxide is an added inorganic flame retardant, and there is good environmental protection properties in raw material source, preparation process and waste disposal comparing with the same type of inorganic flame retardant. Modification treatment is often required due to its poor compatibility with the polymer. Modified magnesium hydroxide can effectively improve the compatibility with polymers
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