Smart polymers are advanced materials that can change their properties in response to external stimuli, such as temperature, pH, or light. These polymers can expand, contract, or alter their shape and function, making them useful in various applications, including drug delivery systems and self-healing materials. One of the key features of smart polymers is their ability to respond to environmental changes, which allows them to perform specific tasks. For example, they can be used in medical devices to release medication at controlled rates or in textiles that adapt to temperature changes, enhancing comfort and functionality.