Related Experiment Video
Updated: Jan 24, 2026

Preparation and Testing of Plant Seed Meal-based Wood Adhesives
Published on: March 5, 2015
Formaldehyde-Free Alcohol-Based Wood Adhesives Prepared by ROMP: High Bonding Strength and Excellent Water Resistance
Lifen Xiao1, Jiahao Liao1, Geng Huang1
1Key Laboratory of Organometallic New Materials College of Hunan Province, Hunan Provincial Key Laboratory of Functional Metal-Organic Compounds, Hengyang Normal University, Hengyang 421008, China.
None:
Developing novel formaldehyde-free wood adhesives with high bonding strength and stability is significant for the environment and for human health. This research developed a series of novel alcohol-based adhesives with different amounts of hydroxyl groups per repeat unit through ring opening metathesis polymerization (ROMP). P2OH exhibited a higher bonding strength than POH and P4OH owing to the strong adhesion and cohesion. In addition, the relationship between bonding strength and molecular weight was also investigated. Taking into account the chain entanglement and fluidity, P2OH500 achieved a highest bonding strength of 5.3 MPa in bonding wood sheets, which was capable of hanging a total weight of 11 kg. Furthermore, P2OH500 exhibited excellent solvent resistance, especially in hot water. The wood sheets retained more than 88% of the original bonding strength after soaking in water at 94 °C for 12 h. It is highly anticipated that this research will provide a new insight into designing formaldehyde-free adhesives with outstanding adhesion performances and excellent water resistance.
Related Concept Videos
Bonding and Strength of Aggregate
Bonding in Metals
Bond Energies and Bond Lengths
Ionic Bonds
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
Relative Strengths of Conjugate Acid-Base Pairs
Acid Strength and Molecular Structure
In the absence of any leveling effect, the acid strength of binary compounds of hydrogen with nonmetals (A) increases as the H-A bond strength decreases down a group in the periodic table. For group 17, the order of increasing acidity is HF < HCl < HBr < HI. Likewise, for group 16, the order of increasing acid strength is H2O < H2S < H2Se < H2Te. Across a row in the periodic table, the acid strength of binary hydrogen compounds increases with increasing...

