Preparation of Hybrid Nanoparticle Nucleating Agents and Their Effects on the Crystallization Behavior of Poly(ethylene terephthalate)

Abstract

In this research contribution, the primary objective was to enhance the crystallization behavior of poly(ethylene terephthalate) (PET). To accomplish this tack, three kinds of new nucleating agents SiO2-diethylene glycol-LMPET (PET-3), SiO2-triethylene glycol–LMPET(PET-4) and SiO2-tetraethylene glycol-LMPET (PET-5) nucleating agents were prepared via grafting different oligomers (diethylene glycol; triethylene glycol and tetraethylene glycol) to the surface of nano-SiO2 and then linking to the low molecular weight poly(ethylene terephthalate) (LMPET). These nano-particle nucleating agents facilitated the crystallization of PET. Differential scanning calorimetry (DSC) studies of the composites that pure PET blended with PET-3, PET-4 and PET-5 indicated that the longer ethoxy segment in the nucleating agents exhibited (i) higher degrees of crystallinity; (ii) faster rates of crystallization; and (iii) higher crystallization temperatures. The Jeziorny method was employed to analyze the non-isothermal crystallization kinetics of the composites. These works demonstrated that the PET-3, PET-4 and PET-5 were attractive nucleating agents for poly(ethylene terephthalate), and the longer the chain length of the ethoxy segment in the nucleating agents, the more efficient the nucleation effect.

Research on synthesis and thermal properties of poly(ethylene terephthalate) sulfonate group containing ionomer

“…In addition, the half crystallization time of different nucleating methods were compared here (SiO 2, 12 PBT/glass fiber, 19 nanoclay, 36 TiO 2, 37 graphene, 38 Pglass, 39 PLA 40 ). The method we reported is superior to those of the traditional methods, implying the effect of sulfonate ionic aggregation (Figure 8).…”

“…8,9 Thus, enhancing melt strength and improving crystallization rate of PET has become a meaningful proposition. 10 The commonly used nucleating methods for enhancing the crystallization properties include inorganic nucleating agent, [11][12][13][14][15] organic nucleating agent 16,17 and polymer nucleating agent. [18][19][20] Inorganic nucleating agents (silica, mica, zinc oxide, carbon nanotubes, etc.)…”

Emerging Applications of Silica Nanoparticles as Multifunctional Modifiers for High Performance Polyester Composites

“…For non-isothermal crystallization and isothermal crystallization, the crystallization rate of PET increased significantly with the increase of SiO 2 content, but the relative crystallinity of nanocomposites is not different from that of pristine PET. Han et al [174] prepared three novel nucleating agents, SiO 2 -diethylene glycol-LMPET (PET-3), SiO 2 -triethylene glycol-LMPET (PET-4), and SiO 2 -tetraethylene glycol-LMPET (PET-5), by grafting different oligomers on the surface of SNs and then linking low molecular weight polyethylene terephthalate (LMPET) to enhance the crystallization properties of polyethylene terephthalate (PET). The mechanism of the above whole reaction process is shown in Figure 5a.…”

UIO-66 as Nucleating Agent on the Crystallization Behavior and Properties of Poly(Ethylene Terephthalate)

“…On the whole, such products with PET as the raw material require longer molding cycles and higher mold temperatures to be well prepared [ 5 , 6 ]. Accordingly, the improvement of the PET crystallization rate has always been a research hotspot in the application of PET to structural materials [ 7 , 8 , 9 ].…”