Mechanical degradation is the breakdown of a polymer due to the application of mechanical forces, such as shear, tension, or compression. This can occur during processing, handling, or use of the polymer. Mechanical degradation can lead to chain scission, changes in molecular weight, and deterioration of the polymer's properties.

机械降解是由于施加机械力（例如剪切、拉伸或压缩）导致的聚合物分解。这可能发生在聚合物的加工、处理或使用过程中。机械降解会导致断链、分子量变化和聚合物性能下降。