Polymer Physics

However, the conformation statistics in Flory’s treatment gives the conformational free energy, rather than the conformational e ...

and obtains fðT>TgÞ¼fgþðTTgÞaf (6.61) The free volume is related to the polymer viscosityaccording to Doolittle empirical e ...

The traditional dynamic theories treat the molecular motion as a relaxation process reflected as a characteristic relaxation tim ...

All those theories above consider the homogeneous freezing process of glass transition in the liquid. In fact, fluctuations gene ...

Diluent or plasticizer. The mixture of polymer (labeled with the subscript p) and diluent (labeled with the subscript d) can be ...

Tgx¼TgðlinearÞþKxr (6.78) or Tgx¼TgðlinearÞþ Kx Mc (6.79) HereKxis constant, andMcis the average molecular weight of the network ...

From the scaling analysis of chain dynamics in the last chapter, the fluid transitionTfcan be understood as the temperature corr ...

showing yielding, necking, strain hardening and eventually ductile failure; (3) hard and strong, such as hard PVC and the blend ...

another critical strain, the drawn molecules will re-crystallize at low temperatures, making thinner but highly oriented small c ...

Since the defects distribute quite inhomogeneous in the materials, the results of mechanical measurement are often irreproducibl ...

compatibilizer in their blends, such as PS-graft-PB copolymer, Dow Chemical Company has produced commercial hard-and-tough high- ...

Arrhenius S (1889) U ̈ber die Reaktionsgeschwindigkeit bei der Inversion von Rohrzucker durch Sa ̈uren. Z Phys Chem (Leipzig) 4: ...

Go ̈tze W, Sjo ̈gren L (1992) Relaxation processes in supercooled liquids. Rep Prog Phys 55:241–376 Kauzmann W (1948) The nature ...

Chapter 7 Polymer Flow 7.1 Introduction to Rheology 7.1.1 What Is Rheology? Large-enough deformation of solid materials causes f ...

whereDis the tube diameter,vis the average flow velocity,ris the density of the fluid,is the viscosity of the fluid. The Reynol ...

wheregis the shear deformation ratio,g^0 is the shear rate. Accordingly, the equation of motion for the Newtonian fluid can be o ...

Here dv/dxis the extensional strain rate, andeis the extensional viscosity. The correlation between the ideal extensional visco ...

phenomenon is calledshear thickening, which widely exists in the dispersing systems like latexes, suspensions, filled polymers, ...

fluids similar to De Waele–Ostwald equation is often called theconstitutive equa- tionof the fluids (De Waele 1923 ; Ostwald 192 ...

Such a behavior of stress relaxation is calledtime-strain separability(Larson 1988 ). The factorh(g)is called the damping functi ...