Pentane

CAS 109-66-0

n-Pentane shows how a liquid can help create a lightweight solid. CAS 109-66-0 identifies the unbranched five-carbon alkane. In polymer foam, it can act as a physical blowing agent: changing state generates gas while the developing polymer forms cell walls. This differs from a chemical reaction that produces a new gaseous substance. Published polyurethane studies examine how pentane participates in particular formulations, including composites with expandable graphite. Their performance belongs to those complete materials, not to the blowing agent alone. Cell structure and gas content also influence heat transfer. Its story connects molecular volatility with materials architecture, showing why the origin of a pore, the identity of its wall, and the measured behavior of the finished foam are related but distinct parts of the same investigation.