Neoprene is the synthetic polymer that resembles natural rubber.

Explanation:
Neoprene is a synthetic rubber that was first developed by DuPont in the 1930s. It is a type of synthetic polymer that exhibits similar properties to natural rubber, making it an excellent substitute for natural rubber in various applications.

Key Points:
Here are some key points that explain why neoprene resembles natural rubber:

1. Chemical Structure: Neoprene is a polymer made from the monomer chloroprene. It consists of repeating units of chloroprene molecules, which are chemically similar to the isoprene units found in natural rubber. The similarity in chemical structure allows neoprene to exhibit similar physical properties to natural rubber.

2. Elasticity: Neoprene, like natural rubber, is highly elastic. It can stretch and return to its original shape without losing its elasticity. This property makes neoprene suitable for applications that require flexibility and resilience, such as in the production of wetsuits, gaskets, and seals.

3. Resistance to Aging: Neoprene, like natural rubber, is resistant to aging and degradation caused by exposure to sunlight, ozone, and other environmental factors. This resistance allows neoprene to maintain its physical properties over an extended period, making it suitable for outdoor applications.

4. Chemical Resistance: Neoprene exhibits good resistance to chemicals, oils, and greases. It can withstand exposure to a wide range of chemicals without undergoing significant degradation. This property makes neoprene a preferred choice for applications in industries such as automotive, marine, and oil and gas.

5. Water Resistance: Neoprene is highly water-resistant, which makes it ideal for applications that require protection against moisture and water. It is commonly used in the production of wetsuits, diving gear, and waterproof seals.

In conclusion, neoprene is a synthetic polymer that closely resembles natural rubber in terms of its chemical structure and physical properties. Its similarity to natural rubber makes it a versatile material that can be used as a substitute in various applications, providing similar performance and durability.