Year: 2025
Type: article
Abstract: Polypropylene (PP) exhibits excellent rigidity, heat resistance, and low density. To enable lightweight automotive designs through the multi-material integration of PP with metal, we have developed an innovative adhesive polyolefin capable of bonding these two promising materials.The adhesive polyolefin is composed of a thermoplastic elastomer, zinc diacrylate (ZDA) as a reactive adhesion component, and a specific peroxide. Press-heated molding with this adhesive polyolefin achieved bonding between PP composites and aluminum, achieving a high tensile shear strength exceeding 10 MPa. In contrast, polyolefin without ZDA displayed no adhesion to aluminum.After the peel test with the adhesive polyolefin/aluminum bonding sample, observation of the aluminum surface using SEM-EDX revealed the presence of residues containing a high concentration of zinc elements. To elucidate the adhesion mechanism involving ZDA and peroxide, FT-IR, STEM-EDX, and XPS measurements were conducted. The results suggested that the adhesive polyolefin containing ZDA adheres to aluminum through the following mechanisms :1. During heat treatment in compression molding, ZDA segregates to the aluminum interface.2. Segregated ZDA at the interface undergoes polymerization and crosslinking with polyolefin, initiated by radicals generated from the peroxide.
Source: Seikei-Kakou
Authors: Yosuke Furuya, Shinichiro Shimomura, Wakaba Urano, Takeshi Tominaga, Shin Horiuchi
Language: English
Subfield: General Materials Science
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4417514959