Which one of the following is an example of biodegradable polyester?

Options

A. PHBV
B. PET
C. Nylon 6
D. Bakelite

Answer

To determine which of the given options is an example of a biodegradable polyester, we need to analyze the polymers mentioned in the video transcript. Here’s the step-by-step solution:

### Step 1: Identify the Polymers
The transcript mentions several polymers:
1. PHBV (Poly β-hydroxybutyrate-co-β-hydroxyvalerate)
2. Terephthalic acid (commonly known as Terlene)
3. Nylon 6
4. Bakelite

### Step 2: Define Biodegradable Polyester
A biodegradable polyester is a type of polymer that can be decomposed by microorganisms into natural substances like water, carbon dioxide, and biomass.

### Step 3: Analyze Each Polymer
- **PHBV**: This is a copolymer made from β-hydroxybutyric acid and β-hydroxyvaleric acid. It is known to be biodegradable due to its natural origins and the ability to be broken down by microorganisms.

- **Terephthalic acid (Terlen)**: This is a polyester formed from terephthalic acid and ethylene glycol. It is not biodegradable and is commonly used in plastics like PET.

- **Nylon 6**: This is a synthetic polymer made from caprolactam. It is also non-biodegradable.

- **Bakelite**: This is a thermosetting plastic made from phenol and formaldehyde. It is non-biodegradable.

### Step 4: Conclusion
From the analysis, the only biodegradable polyester mentioned is **PHBV**. Therefore, the answer to the question is:

**PHBV is an example of a biodegradable polyester.**

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