A semi synthetic polymer is a polymer made by chemically treating a natural polymer. ... For example, cellulose acetate is a thermoplastic polymer that is produced from cellulose, a natural polymer, rather than through polymerization reaction of a monomer.

Cellulose acetate is a semi-synthetic polymer that is widely used in the production of various products. This material is obtained by chemically modifying cellulose, which is a natural polymer found in plants.

Production Process:
The production process of cellulose acetate involves the following steps:
- Cellulose is first treated with acetic acid and acetic anhydride to form cellulose triacetate.
- This reaction is then followed by hydrolysis, which produces cellulose diacetate.
- Further hydrolysis generates cellulose acetate, which is the final product.

Properties:
Cellulose acetate has several desirable properties, such as:
- It is resistant to water and organic solvents.
- It is biodegradable and eco-friendly.
- It is transparent and has a glossy finish.
- It is lightweight and easy to handle.

Uses:
Cellulose acetate finds its applications in various industries, such as:
- It is used in the production of cigarette filters, photographic films, and eyeglass frames.
- It is used as a coating for fabrics and papers to improve their durability and water resistance.
- It is used in the production of artificial leather and suede.
- It is used in the textile industry to produce fibers for clothing and other textiles.

Conclusion:
In conclusion, cellulose acetate is a semi-synthetic polymer that is obtained by modifying cellulose. It has several desirable properties and finds its applications in various industries.