What type of polymer is represented by following segment ?
`-overset(O)overset(||)C-CH_2CH_2-overset(O)overset(||)(C)-OCH_2CH_2O-`

Options

A. Polyamide
B. Polyester
C. Polyolefin
D. Polyethylene

Answer

To determine the type of polymer represented by the given segment `-O=C-CH2CH2-O=C-OCH2CH2O-`, we will analyze its structure step by step.

### Step 1: Identify the Functional Groups
The given polymer segment contains:
- Two carbonyl groups (C=O) indicated by `O=C`.
- Two ether linkages (–O–) indicated by the presence of oxygen atoms between carbon chains.

### Step 2: Analyze the Structure
The presence of carbonyl groups suggests that this polymer could be formed from carboxylic acids and alcohols. The repeating unit appears to consist of:
- A carbon chain (CH2CH2) connected to carbonyl groups and ether linkages.

### Step 3: Determine the Type of Polymer
1. **Polyester**: Formed from the reaction of diacids and diols. The presence of carbonyl (C=O) and ether (–O–) linkages in the structure suggests that this polymer is indeed a polyester.
2. **Polyamide**: Would contain amide linkages (–C(=O)NH–), which are not present here.
3. **Polyolefin**: Would involve the polymerization of alkenes (double bonds), which is not applicable here.
4. **Polyethylene**: Is a simple polymer made from ethylene (C2H4) and does not contain the functional groups present in the given structure.

### Conclusion
Based on the analysis, the polymer represented by the segment is a **polyester**.

### Final Answer
The correct type of polymer represented by the segment is **polyester**.

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