The ceiling temperature (Tc) is a critical parameter in chain-growth polymerization. It represents the temperature above which the rate of depolymerization (breaking down the polymer back into monomers) exceeds the rate of polymerization. At temperatures above Tc, the formation of high molecular weight polymer becomes thermodynamically unfavorable. This concept is crucial in understanding the limitations of certain polymerization reactions and in controlling the molecular weight of the final polymer product.

最高聚合温度 (Tc) 是链增长聚合中的一个关键参数。它表示高于此温度解聚速率（将聚合物分解回单体）超过聚合速率的温度。在高于 Tc 的温度下，高分子量聚合物的形成在热力学上变得不利。这个概念对于理解某些聚合反应的局限性和控制最终聚合物产品的分子量至关重要。