Low-water-absorption reinforced polyamide compound and preparation method thereof

Abstract

The invention relates to a polyamide preparing technology, in particular to a low-water-absorption reinforced polyamide compound and a preparation method thereof. The method comprises the following step of: adding a lubricating agent and an antioxidant by taking polyamide as a substrate, taking a linear phenolic resin as a polar resin and taking glass fiber as a reinforcing body to obtain the low-water-absorption reinforced polyamide compound with low water absorbing and high size stability; the preparation method of the low-water-absorption reinforced polyamide compound disclosed by the invention has the advantages of simple processing technic and high product molding accuracy; the prepared polyamide compound can be processed by molding at the normal mold temperature, and an obtained molded plastic sample bar has high strength when reached saturated water absorption; and aid such as the phenolic resin, the antioxidant, the lubricating agent, glass fiber and the like are cheap and readily-available commercial products, so that the low-water-absorption reinforced polyamide compound is low in production cost, and is suitable for batch production.

Description

technical field [0001] The invention relates to polyamide preparation technology, in particular to a low water absorption reinforced polyamide compound and a preparation method thereof. Background technique [0002] Polyamide is the first of the five major engineering plastics and is widely used in electric tools, electronic appliances, automobiles, furniture, sporting goods and other fields. Its special molecular structure determines that it has a series of excellent physical and mechanical properties. Reinforced polyamide composites are a class of polyamide products, which have excellent tensile strength and bending strength, but because polyamide contains carbonyl and amine groups, it is easy to form intermolecular hydrogen bonds with water molecules, easy to absorb water, and rigid when balanced Poor, the modulus decreases; the same reinforced polyamide composites have strong water absorption in a humid environment, the rigidity of the material after water absorption is ...

AI Technical Summary

Problems solved by technology

Reinforced polyamide composites are a class of polyamide products, which have excellent tensile strength and bending strength, but because polyamide contains carbonyl and amine groups, it is easy to form intermolecular hydrogen bonds with water molecules, easy to absorb water, and rigid when balanced become worse, the modulus decreases; the same reinforced polyamide composite has strong water absorption in a humid environment, the rigidity of the material after water absorption is greatly reduced, and the strength is also reduced

Reinforced polyamide composites have the disadvantages of decreased rigidity and strength during use, and are prone to creep under stress

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