Enhancing the Mechanical and Adhesive Properties of Polyurethane Adhesives with Propylene Oxide-Modified Ethylenediamine (PPO-EDA)

Polymers, Год журнала: 2025, Номер 17(2), С. 231 - 231

Опубликована: Янв. 17, 2025

This study explores the use of propylene oxide-modified ethylenediamine (PPO-EDA) as a novel crosslinker and chain extender in polyurethane (PU) adhesives. PPO-EDA was synthesized compared with N,N’-dimethylethylenediamine (DMEDA) to assess its impact on mechanical properties adhesion performance. Key parameters such NCO conversion, tensile strength, lap shear strength were thoroughly evaluated. The results demonstrated that incorporating significantly improved conversion crosslink density, leading notable enhancements elastic modulus DMEDA. Lap tests further revealed superior performance PPO-EDA-modified PU adhesives, particularly amine silane-treated steel substrates, where consistently outperformed other samples. attributed PPO-EDA’s dual role crosslinker, which strengthened adhesive’s structural integrity. underscores effectiveness modifier for enhancing both adhesive PU-based offering promising solution optimizing high-performance adhesives automotive industrial applications.

Язык: Английский

Technical Advancements and Applications in Predictive Modeling of Polyurethane Foaming Height

Polymers, Год журнала: 2025, Номер 17(4), С. 452 - 452

Опубликована: Фев. 8, 2025

Various polyurethane foams (i.e., rigid, flexible, and spray foams) offer diverse applications due to their unique properties, including thermal insulation, cushioning, seamless gap filling. These provide solutions across industries such as construction, automotive, refrigeration. However, the foaming process presents several challenges that may result in various defects final products. This work provides innovative predictive techniques for foam expansion advanced manufacturing processes. The height of third agent (PU-3) closely aligned with experimentally measured values. relationship between time is influenced by type concentration catalysts, well blowing agents used. simulations using Moldex 3D Version 2024 revealed a nonlinear time, characterized three distinct rates. Zone B demonstrated highest rate, followed C, while A showed lowest rate. rate were significantly angle, smaller angles enhancing both parameters. At mold temperature 30 °C an coefficient 35, predicted achieved average accuracy approximately 96% four angles. Based on these experimental findings, this study introduces mechanisms involved components.

Язык: Английский