Obtaining of a PET/SiC hybrid multifilament: Non-isothermal crystallization studies

Abstract

Thermal processing properties are a key factor in the industrial processing industry. The obtaining of a PET-based hybrid composite multifilament with textile properties (yarns) is presented. The system is composed by ceramic silicon carbide (SiC) nanoparticles and a dispersing agent included in a PET matrix. With the objective to produce a suitable nanocomposite, the study is divided in three parts: (i) evaluation by non-isothermal crystallization of three different dispersing agents (two of them based on esters of montanic acids and, the other on an amide wax) to achieve an homogeneous nanocomposite; (ii) study of the influence of the concentrations of SiC and of the more suitable dispersing agent on the thermal properties of the PET-hybrid composite; and (iii) the obtaining of a PET-hybrid multifilament with textile properties together with its characterization by Gel Permeation Chromatography (GPC), Differential Scanning Calorimetry (DSC) and mechanical properties.

The Effect of Accelerated Aging on the Molecular Weight and Thermal and Mechanical Properties of Polyester Yarns Containing Ceramic Particles

“…Regarding the nonisothermal crystallization peak (T c ) ( Figure 7 b), no significant variations were observed in pure PET because of the exposure in the climatic chamber, and the differences were attributable to random experimental errors. For the blends with particles, an increment of T c in the unexposed yarns with nanoparticles was seen, which meant that they acted as nucleating agents [ 44 , 47 ] In previous studies [ 14 , 15 , 19 ], it was found that the use of Licowax-E (montane acid ester with multifunctional alcohols) as a dispersant influenced such behavior of the ceramic particles. In the case of exposed yarns, a similar response was found in all of them.…”

“…In this context, in previous studies carried out by the research team, the effect of the inclusion of nano and microparticles of TiO 2 , SiC, and CaF 2 on the physical and chemical properties of polyethylene terephthalate (PET) has been analyzed. These results have made it possible to determine the most suitable processing conditions and dispersant for obtaining the PET multifilament yarns used in this work [ 14 , 15 , 16 , 17 , 18 , 19 , 20 ].…”