tube model

https://doi.org/10.1351/goldbook.12269
Model to describe the motion of a polymer chain confined in the hypothetical tube created by neighbouring chains.
Notes:
  1. In the tube model, the polymer chain moves along the hypothetical tube defined by the neighbouring polymer chains. The tube is continually undergoing tube renewal.
  2. The tube model is an essential concept for reptation.
Source:
PAC, 2015, 87, 71. (Definitions of terms relating to individual macromolecules, macromolecular assemblies, polymer solutions, and amorphous bulk polymers (IUPAC Recommendations 2014)) on page 105 [Terms] [Paper]