橡胶（Rubber）是指具有可逆形变的高弹性聚合物材料，在室温下富有弹性，在很小的外力作用下能产生较大形变，除去外力后能恢复原状。橡胶属于完全无定型聚合物，它的玻璃化转变温度（T g）低，分子量往往很大，大于几十万。
Rubber is a high elastic polymer material with reversible deformation, which is elastic at room temperature and can produce large deformation under a small external force, and can be restored to its original state after removing the external force. Rubber is a completely amorphous polymer. Its glass transition temperature (T g) is low and its molecular weight is often large, which is more than hundreds of thousands.
早期的橡胶是取自橡胶树、橡胶草等植物的胶乳，加工后制成具有弹性、绝缘性、不透水和空气的材料。是高弹性的高分子化合物。橡胶分为天然橡胶与合成橡胶二种。天然橡胶是从橡胶树、橡胶草等植物中提取胶质后加工制成；合成橡胶则由各种单体经聚合反应而得。橡胶制品广泛应用于工业或生活各方面。
Early rubber was obtained from latex of rubber trees, rubber grass and other plants, and processed into materials with elasticity, insulation, impermeability and air. It is a high elastic polymer compound. Rubber is divided into natural rubber and synthetic rubber. Natural rubber is made from rubber tree, rubber grass and other plants after extracting gum, while synthetic rubber is made from various monomers through polymerization. Rubber products are widely used in industry and life.