Repozytorium publikacji - Politechnika Gdańska

The development of lightweight, often multi-component products requires adaptable and robust bondingsolutions. Hot melt adhesives increasingly attract industrial interestas they combine good adhesive strength, facile processability, andcost-efficiency. Recently, our group has reported on the remarkableadhesive performance of hydroxyl-functionalized propylene-basedcopolymers in bonding both polar and nonpolar surfaces. Theobtained adhesive strength proved to be too high for applicationssuch as single-use packaging, which requires low to moderateadhesion for easy opening. Tuning the adhesive strength bymanufacturing numerous functionalized polyolefin grades with varying contents of hydroxyl-functional groups is challenging in viewof industrial-scale production. Herein, we elucidate an alternative approach to tune the adhesive performance by blending thefunctionalized propylene copolymers with nonfunctionalized congeners. To understand the structure−property relationship of theinvestigated diluted blends, a thorough characterization of morphology, physical properties, crystallization, and viscoelastic behaviorwas performed. It appeared that the crystallinity of the nonfunctionalized polyolefin and its miscibility with the functionalizedpolyolefin play a crucial role on the adhesive strength of the blends. Either a gradual decrease in adhesive strength with dilution wasnoticed or�surprisingly�no loss of adhesive strength was observed at all, not even after diluting 100 times! Molecular dynamicssimulations revealed an intrinsic tendency of the hydroxyl-functionalized polyolefin to migrate to and interact with the aluminumoxide surface.

Autorzy

• prof. dr hab. inż. Lidia Jasińska-Walc link otwiera się w nowej karcie ,
• Weronika Nowicka link otwiera się w nowej karcie ,
• Jakub Kruszyński link otwiera się w nowej karcie ,
• Robbert Duchateau,
• Miloud Bouyahyi,
• Artur Różański,
• Lanti Yang,
• Farhan Ahmad Pasha,
• Ralf Kleppinger