Related Experiment Video
Updated: Jun 4, 2025

Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
High strength, self-activating ability and fast adhesion of polyurethane adhesives based on rosin structure in
Rui Yang1, Li Tan2, Zheng Pan2
1College of Chemical Engineering, Nanjing Forestry University, Jiangsu Province, Nanjing, 210037, PR China.
Abstract:
Underwater adhesives hold significant relevance in daily life and applications. Despite great efforts, the development of high-performance underwater adhesives through a simple and effective method remains a difficult challenge. Herein, a high adhesion and environmentally stable polyurethane underwater adhesive (DAP-PU) was developed based on rosin with a hydrogenated phenanthrene ring skeleton to design hydrophobic domains, and combined with multi-strength hydrogen bonding interactions to construct "polar hydrophobic domains". DAP-PU exhibits a strong underwater bonding and adhesion performance on various substrates (steel, aluminum, PMMA and glass) in harsh aqueous conditions (1 M NaCl, pH 5 and seawater), with the highest peel and shear strengths on stainless steel substrates reaching 12.88 N cm-1 and 1.7 MPa, respectively. In addition, DAP-PU can be used in various fields such as underwater sand consolidation, underwater sealing and repair.
Related Concept Videos
Anionic Chain-Growth Polymerization: Overview
Polymer Classification: Architecture
Mortar Properties
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Types of Step-Growth Polymers: Polyesters
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polymer Classification: Stereospecificity

