The synthesis of hydroxyl functionalized propylene-based terpolymers and their performance as hot melt adhesives were investigated. The products comprise uniformly distributed butyl and 4-hydroxyl-butyl branches along the polypropylene backbone. Despite the low hydroxyl-functionality level of ≤ 0.5 mol%, hydroxyl functionalized terpolymers show formidable adhesion to aluminum and steel providing an adhesive strength exceeding 16 MPa, whereas the non-functionalized congeners hardly adhere to these metals. As evidenced by rheological measurements, the functional groups form dynamic cross-links based on hydrogen bonding and electrostatic interactions with aluminum oxide hydroxide residues, remaining in the product after polymerization. At the industrial application temperature of 180 °C, non-deashed and deashed samples of polymers having 0.1 mol% or 0.5 mol% of incorporated 5-hexen-1-ol gave, upon cooling to room temperature, comparable adhesive strengths. Deashing and increasing the functionality level leads to a significant improvement of the adhesion strength at lower application temperature (130 °C), allowing application of the hydroxyl functionalized propylene-based terpolymers as high strength hot melt adhesive for combinations of polypropylene and metals.
Authors
- Jakub Kruszyński link open in new tab ,
- Weronika Nowicka link open in new tab ,
- Miloud Bouyahyi,
- Yingxin Liu,
- Lanti Yang,
- Artur Rozanski,
- Nithish Anbuchezhian,
- dr hab. inż. Lidia Jasińska-Walc link open in new tab ,
- Rob Duchateau
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1021/acsapm.3c00566
- Category
- Publikacja w czasopiśmie
- Type
- artykuły w czasopismach
- Language
- angielski
- Publication year
- 2023
