The Difference Between Rubber and Plastics

2026-03-30

The most fundamental distinction between rubber and plastic lies in their deformation behavior: plastics undergo plastic deformation, while rubber exhibits elastic deformation. In practical terms, plastic deformation results in a permanent shape change that does not readily return to its original state, whereas rubber can recover its original shape relatively easily after deformation. The elasticity of plastic is typically quite limited, generally below 100% elongation, whereas rubber can achieve elongation values of 1000% or more, reflecting its remarkable elastic properties. Another significant difference is in processing: most plastic molding processes are completed without requiring further chemical reactions, while rubber molding processes necessitate vulcanization to achieve their characteristic elastic properties.

Rubber refers to a class of polymer compounds characterized by outstanding high elasticity, encompassing both natural rubber and synthetic rubber varieties. Natural rubber is obtained from certain plant sources, primarily the rubber tree (Hevea brasiliensis). Synthetic rubber is manufactured from monomers such as butadiene, isoprene, and chloroprene, which are derived from natural gas and petroleum feedstocks. Numerous types of synthetic rubber exist, with styrene-butadiene rubber being the most widely utilized synthetic rubber globally. Specialized formulations such as conductive rubber are produced by incorporating silver-plated rubber fillers through a series of molding and vulcanization processes, resulting in materials with electrical conductivity and electromagnetic shielding performance.

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The Difference Between Rubber and Plastics

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