Discussion
Match the following additives to their respective functions
| Additive | Function |
|---|---|
| P. p-phenylenediamine | 1. Flame retardant |
| Q. Trixylyl phosphate | 2. Impact modifier |
| R. Polybutadiene rubber | 3. Nucleating agent |
| S. Talc | 4. Antiozonant |
Answer: D
The match is P-4; Q-1; R-2; S-3.
- p-Phenylenediamine derivatives are the standard antiozonants for rubber.
- Trixylyl phosphate is a phosphate ester plasticiser that also acts as a flame retardant.
- Polybutadiene rubber dispersed in a brittle matrix such as polystyrene is an impact modifier.
- Talc particles provide sites for crystallization in polypropylene: a nucleating agent.
The other options swap these roles, for example calling talc a flame retardant or polybutadiene a nucleating agent.
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