Morphological Study and Dielectric Behavior of Nonisothermally Crystallized Poly(ethylene naphthalate) Nanocomposites as a Function of Graphene Content

Abstract

Morphological evolution and dielectric properties of poly(ethylene naphthalate)- (PEN-) graphene nanocomposites nonisothermally crystallized have been investigated. PEN-graphene nanocomposites containing 0.01, 0.025, 0.05, 0.075, and 0.1 wt% of graphene were prepared by melt blending in a mini twin screw extruder. The results showed that graphene exhibited a superior influence on morphological and conformational structure of PEN during nonisothermal crystallization at low graphene contents. Crystallization temperature (Tc) was found to be increased up to 18°C supporting the high nucleating activity of graphene layers. Wide angle X-ray diffraction (WAXD) and Fourier Transform Infrared Spectroscopy (FTIR) indicated that graphene modifies the conformation of PEN chains promoting crystallinity and favoring the evolution from α to β crystalline form with homogeneous lamellar thickness. It may be attributed to the structural similarity between naphthalene rings and graphene structure and to π-π interactions during nucleation. Dielectric behavior was found to be a function of graphene content where the nanocomposites changed from dielectric to low conducting material when passing from 0.075 to 0.1 wt% of graphene content. This phenomenon permits having a wide range of properties to fit a wide variety of applications required to store electrical energy of low voltage.

Extrusion of Polymer Nanocomposites with Graphene and Graphene Derivative Nanofillers: An Overview of Recent Developments

“…Therefore, this kind of materials shows promising applications in oil-water separation. A modification of the conformation of PEN polymer chains due to graphene nanofiller has been described [71]. Consequently, the crystallization of PEN occurs with the addition of graphene at very low concentrations (0.01-0.1 wt.…”

Extrusion of Polymer Nanocomposites with Graphene and Graphene Derivative Nanofillers: An Overview of Recent Developments

“…Therefore, this kind of materials shows promising applications in oil-water separation. A modification of the conformation of PEN polymer chains due to graphene nanofiller has been described [71]. Consequently, the crystallization of PEN occurs with the addition of graphene at very low concentrations (0.01-0.1 wt.…”

Fabrication of lightweight and high-strength carbon fiber-reinforced poly(ethylene-2,6-naphthalene) solid and foam composites

“…14,15 Compared with the weaker interactions between the molecules of PET, which mainly consists of benzene rings, the interaction between the naphthalene rings in PEN is stronger, resulting in higher heat resistance and improved mechanical properties. 16,17 Advantages of PEN also include excellent stability, outstanding chemical resistance, and barrier properties in comparison with most of the other thermoplastic resins, 18,19 which makes it quite attractive as a candidate for CFRC thermoplastic matrices. However, there have been only a few investigations on CF-reinforced PEN (CFRPEN) composites.…”

Extrusion of Polymer Nanocomposites with Graphene and Graphene Derivative Nanofillers: An Overview of Recent Developments

“…Therefore, this kind of materials shows promising applications in oil-water separation. A modification of the conformation of PEN polymer chains due to graphene nanofiller has been described [71]. Consequently, the crystallization of PEN occurs with the addition of graphene at very low concentrations (0.01-0.1 wt.…”

Fabrication of lightweight and high-strength carbon fiber-reinforced poly(ethylene-2,6-naphthalene) solid and foam composites

“…14,15 Compared with the weaker interactions between the molecules of PET, which mainly consists of benzene rings, the interaction between the naphthalene rings in PEN is stronger, resulting in higher heat resistance and improved mechanical properties. 16,17 Advantages of PEN also include excellent stability, outstanding chemical resistance, and barrier properties in comparison with most of the other thermoplastic resins, 18,19 which makes it quite attractive as a candidate for CFRC thermoplastic matrices. However, there have been only a few investigations on CF-reinforced PEN (CFRPEN) composites.…”

Extrusion of Polymer Nanocomposites with Graphene and Graphene Derivative Nanofillers: An Overview of Recent Developments

“…Therefore, this kind of materials shows promising applications in oil-water separation. A modification of the conformation of PEN polymer chains due to graphene nanofiller has been described [71]. Consequently, the crystallization of PEN occurs with the addition of graphene at very low concentrations (0.01-0.1 wt.…”

Fabrication of lightweight and high-strength carbon fiber-reinforced poly(ethylene-2,6-naphthalene) solid and foam composites

“…14,15 Compared with the weaker interactions between the molecules of PET, which mainly consists of benzene rings, the interaction between the naphthalene rings in PEN is stronger, resulting in higher heat resistance and improved mechanical properties. 16,17 Advantages of PEN also include excellent stability, outstanding chemical resistance, and barrier properties in comparison with most of the other thermoplastic resins, 18,19 which makes it quite attractive as a candidate for CFRC thermoplastic matrices. However, there have been only a few investigations on CF-reinforced PEN (CFRPEN) composites.…”