Which of the following is a biodegradable synthetic polymer ?

Options

A. Aliphatic polyesters
B. PHBV
C. Nylon-2-nylon-6
D. All of these

Answer

To determine which of the following is a biodegradable synthetic polymer, we will analyze each option provided:

1. **Aliphatic Polyester**:
- Aliphatic polyesters, such as polyglycolic acid (PGA), polylactic acid (PLA), and polycaprolactone (PCL), are known for their biodegradability. These polymers can be broken down by microorganisms, making them suitable for applications where environmental impact is a concern.
- **Conclusion**: Aliphatic polyesters are biodegradable synthetic polymers.

2. **P, H, V, B (Poly-beta-hydroxy-butyrate-co-beta-hydroxy-valerate)**:
- PHVB is a copolymer derived from 3-hydroxybutanoic acid and 3-hydroxyvaleric acid. It is also recognized for its biodegradability, as it can be decomposed by microbial action.
- **Conclusion**: PHVB is a biodegradable synthetic polymer.

3. **Nylon 2, Nylon 6**:
- Nylon 2, Nylon 6 is a polyamide copolymer made from glycine and amino caproic acid. Although it has some biodegradability, it is not as widely recognized as biodegradable compared to the previous two options.
- **Conclusion**: Nylon 2, Nylon 6 has some biodegradability but is not primarily classified as a biodegradable synthetic polymer.

4. **All of these**:
- Since we have established that both aliphatic polyesters and PHVB are biodegradable synthetic polymers, but nylon 2, nylon 6 is not primarily recognized as such, the statement "all of these" cannot be correct.

**Final Answer**: The biodegradable synthetic polymers from the options provided are **Aliphatic Polyester and PHVB**.