Isothermal crystallization kinetics, morphology, and thermal conductivity of graphene nanoplatelets/polyphenylene sulfide composites

Synthesis, characterization and crystallization kinetics of nanocomposites prepared by in situ polymerization of ethylene and graphene

“…Contrary to our results, the authors observed a decrease in the value of n, but this decrease was attributed to the growth of numerous spherulites at or near the rGO surface, which impinge with each other at early stages of crystallization and form a quasi-2D layer of spherulites [25]. Similarly, the nucleation effect of graphene and functionalized graphene has been reported for many other polymers, e.g., polypropylene [34,35] and polyphenylene sulfide [36]. Figure 7a-d shows the experimental and model-predicted relative crystallinity vs time.…”

Non-Isothermal Crystallization Behavior of PEEK/Graphene Nanoplatelets Composites from Melt and Glass States

“…No significant changes can be observed while adding GNP and all of the samples showed two-dimensional growth habit [40]. Similar behaviour was observed in polyphenylene sulphide with the addition of GNP [41] and in PEEK matrix adding CNT´s [19]. The n values of all composites and neat PEEK are higher in the crystallization from glass than in crystallization from melt, suggesting that the type of nucleation and growth of the primary nucleation is different from the kind of non-isothermal crystallization from melt or from cold crystallization.…”

Nonisothermal crystallization kinetics, morphology, and tensile properties of polyphenylene sulfide/functionalized graphite nanoplatelets composites

“…When the BGN contents are 0.5 wt%, the elongation at break increases from 2.1% to 3.2% due to the plasticizing effect of the BGN nanoplatelets. With the increase in BGN contents, the well-dispersed BGN nanoplatelets can create a reticular formation, 16,17,19 which can restrict the motion of PPS chains and reduce the toughness. At a high content of BGN, the degradation of BGN and restriction due to a reticular formation could further reduce the toughness to even lower than that of pure PPS.…”

“…A few works focused on preparation, structure, thermal conductive property, and mechanical property of PPS/GNPs composites have been reported. [17][18][19] In contrast, the nonisothermal crystallization kinetics of PPS/GNPs nanocomposites remains a relatively little-explored field. PPS is well known to be a semicrystalline polymer and the mechanical and physical properties of PPS-based composites are known to be strongly dependent on the crystallinity and morphological structure of PPS composites.…”