Chain extension of poly (ethylene terephthalate) by reactive extrusion with secondary stabilizer
TLDR
In this paper, the secondary stabilizer Irgafos 126 (IRG) was used as a chain extender for polyethylene tereftalate (PET) in the presence of chain extenders.Abstract:
Poly(ethylene tereftalate) (PET) is a polymer highly susceptible to the hydrolytic reactions that occur during applications and mainly in thermomechanical processing. These reactions lead to the decrease of molecular weight of the polymer, limiting the recycling number of the material. The reactive extrusion of the PET in presence of chain extenders is an alternative to recover mechanical and rheological properties that were depreciated by the polymer degradation. In this study, PET wastes from nonwoven fabrics production were extruded in presence of the secondary stabilizer Irgafos 126 (IRG) on variable concentrations. The results showed that Irgafos 126 increased molecular weight, decreased crystallinity and changed processing behavior of the PET, similarly to the effects produced by the well-known chain extender pyromellitic dianhydride (PMDA), showing that the secondary stabilizer Irgafos 126 can also act as a chain extender for the PET.read more
Citations
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Effect of chain extenders on thermal and mechanical properties of poly(lactic acid) at high processing temperatures: Potential application in PLA/Polyamide 6 blend
TL;DR: In this paper, the effect of chain extenders on the thermal and mechanical properties of PLA processed at high temperatures in a twin screw extruder having four different sets of temperature profiles was studied.
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A Review on Multifunctional Epoxy-Based Joncryl® ADR Chain Extended Thermoplastics
TL;DR: In this article, the chemical modification using multifunctional epoxide styrene-acrylic chain was described. But it was only applied to thermoplastic polymers and not to polyethylene.
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Plasma-Etching for Controlled Modification of Structural and Mechanical Properties of Electrospun PET Scaffolds
Houman Savoji,Houman Savoji,Sophie Lerouge,Sophie Lerouge,Abdellah Ajji,Michael R. Wertheimer +5 more
TL;DR: Aligned electrospun poly(ethylene terephthalate) (ePET) nanofiber mats have been fabricated, which mimic the media layer of arteries, and three different plasma etching techniques have been used to bring their mechanical and surface properties in line with those of natural blood vessels.
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A study on the fracture, mechanical and thermal properties of chain extended recycled poly(ethylene terephthalate):
TL;DR: In this article, the aim of the study is to simultaneously improve the mechanical strength and fracture toughness properties of recycled poly(ethylene terephthalate) (r-PET).
Journal ArticleDOI
The use of melt rheology and solution viscometry for degradation study of post-consumer poly(ethylene terephthalate): The effects of the contaminants, reprocessing and solid state polymerization
TL;DR: In this paper, the presence of contaminants, reprocessing and solid state polymerization (SSP) affects the degradation of post-consumer poly(ethylene terephthalate) (PET).
References
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TL;DR: Although primary and secondary recycling schemes are well established and widely applied, it is concluded that many of the PSW tertiary and quaternary treatment schemes appear to be robust and worthy of additional investigation.
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The measurement of the crystallinity of polymers by DSC
Yi Kong,James N. Hay +1 more
TL;DR: In this article, a First Law procedure is suggested which involves heating the sample between two set temperatures, T1 and T2, by the requirement that the degree of crystallinity of the sample should not change either with temperature or time.
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Crystallization kinetics and morphology of poly(trimethylene terephthalate)
TL;DR: In this paper, the isothermal crystallization kinetics of polytrimethylene terephthalate (PTT) were investigated from two temperature limits of melt and glass states.