Interfacial Structure of Polytrimethylene Terephthalate/Polyethylene Terephthalate Bicomponent Filament

Abstract

The interfacial structure and binding forces of polytrimethylene terephthalate/polyethylene terephthalate filament were investigated through the methods of Carbon-13 nuclear magnetic resonance (13C-NMR), differential scanning calorimeter (DSC), scanning electron microscopy (SEM) and optical microscopy. When two molten polymers met during the spinning process, an interface layer between the PTT and PET components formed and played an important role in binding the two components together. When the blending time was sufficient, an ester-interchange reaction took place with the generation of the copolymer. The PET recrystallisation was observed in the DSC curve under the influence of entangled PTT molecular chains. The morphology of the cross-section and side view proved that the linear boundary line was short and weaker in binding without a chemical bond and molecular diffusion. Side-by-side bi-component fiber and split-type fiber was able to be controllably spun by adjusting the spinning parameters.

Color matching of bicomponent (PET/PTT) filaments with high performances using genetic algorithm

“…Among existent studies, several works have focused on the characterization and the physico-chemical properties of these bicomponent filaments (PET/PTT) 8 – 11 . Indeed, recent studies investigated the effect of spinning parameters on the final structural of bicomponent filaments (PET/PTT) and the interfacial structure and binding forces between polytrimethylene terephthalate (PTT) and polyethylene terephthalate (PET) filaments using sophisticated analytical techniques 9 , 10 . Obtained results showed that during the spinning process, a distinct interface layer formed between PTT and PET, crucial for their binding.…”

Flexible preparation of PA6-based thermoplastic elastomer filaments with enhanced elasticity, melt spinnability and transparency enabled by high-molecular-weight soft segments

“…Elastic filaments are commonly used in textiles and can significantly enhance the wearing comfort of garments, stimulating the further development of stretch fabrics. 1–3 However, only three kinds of commercially available elastic filaments for textiles have been developed: Spandex®, 4–6 Dow XLA® 3,7 and T400®, 5,8,9 each with its disadvantages. For example, Spandex® is synthesized using diisocyanate compounds, e.g.…”