Non-Isothermal Crystallization Kinetics and Nanomechanical Properties of Poly(vinylidene fluoride)-La<SUB>0.7</SUB>Sr<SUB>0.3</SUB>MnO<SUB>3</SUB> Nanocomposite Films

Study of Nonisothermal Crystallization Kinetics of Unstretched and Uniaxially Stretched Electroactive PVDF Composite Films

“…Avrami's proposed model for isothermal crystallization has been used to study about the nonisothermal crystallization of polymers, polymeric blends, and composites with some modifications to it. Jeziorney modified the Avrami's equation and proposed that, as the rate of nonisothermal crystallization process depends on the cooling rate ø, the new crystallization rate constant "k c " can be introduced in place of "k t " in Equation ( 1), which can be expressed by [11] ; ln k c = ln k t ∅ Figure 5 and Figure 6 shows plot of "ln [−ln (1 − X t )]" versus "ln t" for all the composite films at different cooling rates. In these plots, it can been seen that the curves show a linear nature at the primary crystallization stage and deviates slightly 2.…”

“…Avrami's proposed model for isothermal crystallization has been used to study about the nonisothermal crystallization of polymers, polymeric blends, and composites with some modifications to it. Jeziorney modified the Avrami's equation and proposed that, as the rate of nonisothermal crystallization process depends on the cooling rate ø , the new crystallization rate constant “ k c ” can be introduced in place of “ k t ” in Equation (), which can be expressed by [ 11 ] ; $$$$\begin{equation*} \ln {k_c} = \frac{{\ln {k_t}}}{\emptyset} \end{equation*}$$$$…”

“…[8][9][10] Also, it affects the rate of crystallization, degree of crystallinity, activation energy, crystallization phase, and melting temperature of the polymer matrix present in that composite. [11] The crystallization process of polymers is usually examined through the differential scanning calorimetry (DSC) method. There are two general conditions used in DSC to study about the crystallization process such as isothermal and nonisothermal conditions.…”