coupling agent/compatibilizers used to strengthen the adhesion between PA and PP/ infill materials and polymer matrix.

When it comes to improving the adhesion between infill materials and the polypropylene matrix, coupling agents can be added to the polypropylene base compounds. Some commonly used coupling agents in polypropylene base compounds include:

1.Maleic Anhydride (MAH) Grafted Polymers: These are polymers that have been modified with maleic anhydride to introduce reactive groups that can bond with polar materials such as polyamides. They are used as compatibilizers to improve the adhesion between polyamide and polypropylene blends.

2.Isocyanate-based Coupling Agents: These are coupling agents that contain isocyanate groups which react with functional groups present on the surface of polyamides, such as amino and hydroxyl groups. They are used to improve the adhesion between infill materials and the polymer matrix.

3.Silane-based Coupling Agents: These are coupling agents that contain silane groups which bond with both organic and inorganic surfaces. They are used to improve the adhesion between glass fiber and the polymer matrix in composite materials, which can include blends of polyamides and polypropylene.

Overall, the use of coupling agents or compatibilizers is an effective approach to enhance the adhesion between PA and PP, as well as infill materials and polymer matrix. This can result in improved mechanical and thermal properties of the composite material.