Semicrystalline
Semicrystalline materials are substances that exhibit a molecular structure composed of both crystalline and amorphous regions. In these materials, some of the molecules are arranged in an ordered, repetitive manner characteristic of crystals, while others are randomly oriented like in amorphous materials. This unique combination of structures results in properties such as strength, stiffness, and thermal resistance, making semicrystalline materials commonly used in various industrial applications.