Polyamide (PA) is one of the most widely used engineering-plastics. Different typs of PAs have distinct variations in properties

such as processability

heat-resistance and water adsorption. In order to further improve the comprehensive performance of polyamide materials and reduce costs

melt blending is the most basic method. Under the influence of high temperature and mechanical force field during melt blending

the amide bond is opened and rearranged to undergo an exchange reaction

and the homopolymer is first converted into a copolymer

resulting in changes in the polymer chain structure

crystalline structure and higher-level aggregation structure. The strength

modulus

toughness

thermal deformation

moisture absorption and other properties of the material change to meet the needs of specific application scenarios. This paper summarizes the transamidation of PA blending

including characterization techniques

the available research systems

accelerating

and restriction process. The transamidation of polyamide with other polymers

such as polyester and polyurethane is also briefly discussed. Finally

the design and preparation of polymer materials based on transamidation and dynamic chemistry principle are prospected.