Which term is defined as an agent that strengthens resin by bonding filler to the resin matrix?

Which term is defined as an agent that strengthens resin by bonding filler to the resin matrix?

• A. Coupling Agent
• B. Force
• C. Gold
• D. Galvanic

Answer: (A)

The idea being tested is how a resin composite gains strength by connecting filler particles to the resin itself. This is done with a coupling agent, usually a silane, that acts as a chemical bridge between the inorganic filler and the organic resin matrix. By bonding to both sides, the coupling agent improves how stress is transferred from the resin to the filler when the material is loaded, which helps prevent filler pull-out and reduces microcracking. That stronger interface leads to a tougher, more durable composite. Other terms don’t describe this bonding role. A general term like force is a physical quantity, not a chemical agent that links filler and resin. Gold is a metal with many uses but not the bonding agent that joins filler to resin in this context. Galvanic refers to electrochemical interaction between dissimilar metals, which is about corrosion or electrical effects, not bonding between resin and filler.

The idea being tested is how a resin composite gains strength by connecting filler particles to the resin itself. This is done with a coupling agent, usually a silane, that acts as a chemical bridge between the inorganic filler and the organic resin matrix. By bonding to both sides, the coupling agent improves how stress is transferred from the resin to the filler when the material is loaded, which helps prevent filler pull-out and reduces microcracking. That stronger interface leads to a tougher, more durable composite.

Other terms don’t describe this bonding role. A general term like force is a physical quantity, not a chemical agent that links filler and resin. Gold is a metal with many uses but not the bonding agent that joins filler to resin in this context. Galvanic refers to electrochemical interaction between dissimilar metals, which is about corrosion or electrical effects, not bonding between resin and filler.