What is difference between acrylic and modacrylic?

Acrylic is a synthetic fiber made from polyacrylonitrile, known for its softness, warmth, and wool-like qualities. Modacrylic, a modified version of acrylic, contains a higher proportion of vinyl chloride, making it more resistant to flames and chemicals. While both fibers are lightweight and durable, modacrylic offers enhanced stability and resilience, making it suitable for specific applications such as protective clothing. Overall, the main differences lie in their chemical composition and performance characteristics.