Which type of adhesive forms a bond by the application of light pressure, with Van der Waals forces playing a significant role?
Correct answer: D. Pressure-sensitive adhesive
- A. Rubber cements
- B. Emulsion adhesives
- C. Contact adhesives
- D. Pressure-sensitive adhesive
Explanation
Pressure-sensitive adhesives (PSAs) form a bond when light pressure is applied, and Van der Waals forces significantly contribute to their adhesive properties. These adhesives are used in products like tapes and labels. Rubber cements, emulsion adhesives, and contact adhesives rely on different bonding mechanisms that do not primarily involve light pressure or Van der Waals forces, making them incorrect choices for this question.
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About Industrial Chemistry
Industrial chemistry applies chemical reactions and material properties to the manufacture of adhesives, dyes and polymers. Coverage includes addition and condensation polymerisation, thermoplastics and thermosetting polymers, the structural basis of colour in dyes, and how adhesive composition enables bonding between surfaces.
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