A kind of polyamide and its preparation method and application

Abstract

The invention provides polyamide. The polyamide is prepared from a mixture of components including caprolactam, aerogel, a surfactant, anhydride, an initiator and an interface agent through polymerization. The invention also provides a preparation method of the polyamide. The method comprises the steps as follows: the caprolactam, the aerogel, the surfactant, the anhydride and the initiator are dissolved in the interface agent in a certain ratio, the solution is heated at 100-150 DEG C for 0.5-5 h and fully stirred, and then discharging and drying are performed. The invention also provides modified polylactic acid prepared from the polyamide.

Description

technical field [0001] The invention relates to the field of petrochemical industry. In particular, it relates to a polyamide and its preparation method and application. Background technique [0002] Polyamide has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubricating properties, low friction coefficient, certain flame retardancy, easy processing, suitable for glass fiber And other fillers to enhance the modification, improve performance and expand the scope of application. There are many production process routes for polyamide 6, and the properties of products obtained by different process routes are quite different, and the uses are also different. According to different polymerization mechanisms, it can be divided into hydrolytic polymerization, solid phase polymerization, anionic polymerization and intercalation polymerization. Among them, hydrolytic polymerization has a long reaction t...

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Problems solved by technology

[0003] The preparation method of polyamide 6 disclosed in the prior art generally requires the use of a large amount of solvent, and is required to be carried out under high temperature and high pressure reaction conditions, and has certain requirements for reaction equipment and process control; there will be a certain amount of solvent residue in the prepared reaction product , is also not conducive to environmental protection; at the same time, as the polymerization reaction continues, water accumulates in the reaction system as a reaction product, which is not conducive to the polycondensation reaction in the direction of chain growth, which affects the relative molecular weight of the polymerization product

In addition, it is well known that the compatibility of polyamides with other polymers is not very good, especially with non-polar polymers (such as polypropylene, polyethylene, etc.), even if the compatibility is improved by adding a compatibilizer, the effect is not good. very limited

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