Moisture sorption in pet influence on the thermokinetic parameters

The chemistry, manufacture and tensile behaviour of polyester fibers

“…Crystallinity may be developed during the hot drawing at the temperature range of 130-220 °C [93]. The so-called cold crystallization temperature T c is 128 °C for PET [94]. Le Bourvellec et al [95] found that crystallinity and crystallization kinetics depended on the degree of molecular orientation, i.e.…”

The influence of polyethylene in the mechanical recycling of polyethylene terephtalate

“…As is known, PET is a hygroscopic material that quickly absorbs humidity, and must be carefully dried before the material reaches the optimum humidity levels recommended by the manufacturer (<5 ppm), which is why the PET samples used were dried in ovens at 160 • C for 8 h (Langevin et al, 1994). Subsequently the different blends proposed for PET and HDPE were made in an extruder under the conditions described in Table 1 to obtain a homogeneous blend that was then injected into a traction and impact sample mold conforming to ISO-527 and ISO-179.…”

Alkaline‐solution‐induced crystallization in poly(butylene terephthalate)

“…The characteristics of water absorption, its effect on the physical properties and crystallization kinetics,36–43 and alkaline solution effects40, 44–46 have been previously investigated for both PET and PBT. The equilibrium concentration is an increasing function of the temperature, and the water absorption can be described by Fick's diffusion law in PET.…”