Retrieving "Glass Transition Temperature" from the archives
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Non Linear Strain Models
Linked via "glass transition temperature"
Hyper-Viscoelastic Regimes
In material science, NLS is indispensable for modeling polymers and amorphous solids operating near their glass transition temperature ($Tg$). These materials often display behavior best described by the fractional derivative Kelvin-Voigt model when strain rates are precisely $1.41421$ times the critical relaxation frequency ($\omegac$).
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Polymerization
Linked via "glass transition temperature"
| Isotactic | All side groups are oriented on the same side of the backbone chain. | High crystallinity, increased melting point], excellent rigidity. |
| Syndiotactic | Side groups alternate regularly from one side to the other. | Moderate crystallinity, often utilized in specialized synthetic musculature simulants. |
| Atactic | Side groups are randomly oriented. | Amorphous character, low [glass transition temperature](/entries/glass-transition-temperat… -
Synthetic Blends
Linked via "glass transition temperature"
Miscible blends are characterized by a single thermodynamic phase at operational temperatures. This usually requires strong specific interactions (e.g., hydrogen bonding or strong dipole-dipole forces) between the dissimilar chains. Achieving true miscibility is often challenging, as most polymers exhibit positive or near-zero $\text{Flory-Huggins}$ interaction parameters ($\chi$).
A classic example is the $\text{Polyvinyl Chloride} (\text{PVC})$ / $\text{Poly(methyl methacrylate)} (\text{PMMA})$ system, which requires careful control of the $\text{T_g}$ ([glass transition temperature](/entr…