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, we can follow these steps:

### Step 1: Analyze the Structure
The provided structure is:
```
-O=C-CH2CH2-O=C-OCH2CH2O-
```
This structure contains carbonyl groups (C=O) and ether linkages (-O-), which are indicative of certain types of polymers.

### Step 2: Identify the Functional Groups
- The presence of two carbonyl groups suggests that the polymer is formed from a dicarboxylic acid.
- The presence of ether linkages indicates that there are alcohol groups involved, which can be derived from glycols.

### Step 3: Recognize the Monomer Units
From the analysis:
- The glycol component can be identified as ethylene glycol (HO-CH2-CH2-OH).
- The dicarboxylic acid component can be identified as a dicarboxylic acid, which typically has two carboxylic acid (-COOH) groups.

### Step 4: Understand the Polymerization Process
- The polymerization process involves the reaction between the glycol and dicarboxylic acid, where a water molecule is eliminated (condensation reaction).
- This process results in the formation of ester linkages (-CO-O-) between the monomer units.

### Step 5: Conclude the Type of Polymer
Based on the structure and the monomer units involved, we can conclude that the polymer is a **polyester**. Polyesters are formed through the condensation reaction of glycols and dicarboxylic acids.

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

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