Which of the following are addition copolymers

Options

A. Saran
B. vinyon
C. SBR
D. PVC

Explanation

To determine which of the given options are addition copolymers, we need to understand what addition copolymers are and analyze the options provided.

### Step-by-Step Solution:

1. **Definition of Addition Copolymers**:
- Addition copolymers are formed by the polymerization of two different types of monomers through addition reactions. In these reactions, the double bonds in the monomers are broken, allowing them to link together without the loss of any small molecules.

2. **Identify the Options**:
- The question does not provide specific options, but based on the video transcript, we can infer some common examples of addition copolymers mentioned:
- Sarin (copolymer of vinyl chloride and vinylidene chloride)
- Vinyl chloride and vinyl acetate
- SBR (styrene-butadiene rubber, copolymer of styrene and 1,3-butadiene)
- PVC (polyvinyl chloride, which is a homopolymer)

3. **Analyze Each Option**:
- **Sarin**: This is an addition copolymer formed from vinyl chloride and vinylidene chloride.
- **Vinyl Chloride and Vinyl Acetate**: This is also an addition copolymer as it involves the polymerization of two different monomers.
- **SBR (Styrene-Butadiene Rubber)**: This is a well-known addition copolymer formed from styrene and 1,3-butadiene.
- **PVC (Polyvinyl Chloride)**: This is a homopolymer made from vinyl chloride alone and does not qualify as a copolymer.

4. **Conclusion**:
- The addition copolymers from the options mentioned are:
- Sarin
- Vinyl chloride and vinyl acetate
- SBR (styrene-butadiene rubber)

### Final Answer:
The addition copolymers among the options are:
- Sarin (vinyl chloride and vinylidene chloride)
- Vinyl chloride and vinyl acetate
- SBR (styrene and 1,3-butadiene)