WebJul 9, 2024 · In physically (statistically) based theories for rubber-like materials, network models serve as a bridge that connects chain dynamics to continuum constitutive relations. However, there is no existing network model that accounts for the size-dependent mechanical properties of nano/microsize polymeric structures. The present work aims to … WebPolymer chain theories. Invoking the theory of rubber elasticity, one considers a polymer chain in a cross-linked network as an entropic spring. When the chain is stretched, the entropy is reduced by a large margin because there are fewer conformations available.
Strain gradient elasticity theory of polymer networks
WebApr 14, 2024 · Both for the random and nonrandom statistical networks whose cycle rank is r, a linear relationship Rg 2 = a r D applies. The ratio ϕ of a r against the corresponding ring-free architecture a 0 , ϕ r = a r / a 0 has a universal relationship applicable both for the random and nonrandom networks with ϕ r ∝ r −0.25 for large r ’s, and an empirical … WebApr 16, 2024 · A fundamental theory is presented for the mechanical response of polymer networks undergoing large deformation which seamlessly integrates statistical mechanical principles with macroscopic thermodynamic constitutive theory. Our formulation permits the consideration of arbitrary polymer chain behaviors when interactions among chains may … bp target type 2 diabetes nice
Mechanical properties of hydrogels. (a) Stress vs ... - ResearchGate
WebJul 29, 2024 · Covalent adaptable networks (CANs) are covalently cross-linked polymers that may be reshaped via cross-linking and/or strand exchange at elevated temperatures. They represent an exciting and rapidly developing frontier in polymer science for their potential as stimuli-responsive materials and to make traditionally nonrecyclable … WebSep 16, 2016 · Elasticity, one of the most important properties of a soft material, is difficult to quantify in polymer networks because of the presence of topological molecular defects in these materials. Furthermore, ... The results led to a real elastic network theory (RENT) that describes how loop defects affect bulk elasticity. WebApr 1, 2024 · Polymer networks are complex systems consisting of molecular components. Whereas the properties of the individual components are typically well understood by most chemists, translating that chemical insight into polymer networks themselves is limited by the statistical and poorly defined nature of network structures. As a result, it is … gynecologist rome ga