: Unique to cross-linked polymers, this is an entropic force—stretching a chain reduces its entropy, so the chain "pulls back" to return to a more disordered state. 3. Dynamics and Rheology
: Above a certain molecular weight, chains become physically interlaced, creating a temporary network that resists motion.
Polymers don't just melt like simple solids; their state depends heavily on temperature and chain mobility. Glass Transition ( Tgcap T sub g
: These account for "excluded volume," meaning two segments cannot occupy the same space. Key Measurements : End-to-End Distance (
Polymer physics is the field that applies statistical mechanics and physical chemistry to understand the behavior of macromolecules—long, chain-like molecules made of repeating units called monomers. Because these chains are so large and complex, they are typically described using statistical models rather than deterministic ones. 1. Fundamental Models of a Single Chain
: Unique to cross-linked polymers, this is an entropic force—stretching a chain reduces its entropy, so the chain "pulls back" to return to a more disordered state. 3. Dynamics and Rheology
: Above a certain molecular weight, chains become physically interlaced, creating a temporary network that resists motion.
Polymers don't just melt like simple solids; their state depends heavily on temperature and chain mobility. Glass Transition ( Tgcap T sub g
: These account for "excluded volume," meaning two segments cannot occupy the same space. Key Measurements : End-to-End Distance (
Polymer physics is the field that applies statistical mechanics and physical chemistry to understand the behavior of macromolecules—long, chain-like molecules made of repeating units called monomers. Because these chains are so large and complex, they are typically described using statistical models rather than deterministic ones. 1. Fundamental Models of a Single Chain