Influence of Different Molecular Weights and Concentrations of Poly(glycidyl methacrylate) on Recycled Poly(ethylene terephthalate): A Thermal, Mechanical, and Rheological Study

This work shows the potential of binary blends composed of partially bio-based poly(ethyelene terephthalate) (bioPET) and fully bio-based poly(amide) 10,10 (bioPA1010). These blends are manufactured by extrusion and subsequent injection moulding and characterized in terms of mechanical, thermal and thermomechanical properties. To overcome or minimize the immiscibility, a glycidyl methacrylate copolymer, namely poly(styrene-ran-glycidyl methacrylate) (PS-GMA; Xibond™ 920) was used. The addition of 30 wt % bioPA provides increased renewable content up to 50 wt %, but the most interesting aspect is that bioPA contributes to improved toughness and other ductile properties such as elongation at yield. The morphology study revealed a typical immiscible droplet-like structure and the effectiveness of the PS-GMA copolymer was assessed by field emission scanning electron microcopy (FESEM) with a clear decrease in the droplet size due to compatibilization. It is possible to conclude that bioPA1010 can positively contribute to reduce the intrinsic stiffness of bioPET and, in addition, it increases the renewable content of the developed materials.

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Polymerization of glycidyl methacrylate with poly(ethylene terephthalate) fibers using Fe2–H2O2 redox system

Journal of Applied Polymer Science ◽

10.1002/app.1983.070280126 ◽

1983 ◽

Vol 28 (1) ◽

pp. 303-310 ◽

Cited By ~ 6

Author(s):

A. Hebeish ◽

S. Shalaby ◽

A. Waly ◽

A. Bayazeed

Keyword(s):

Glycidyl Methacrylate ◽

Ethylene Terephthalate ◽

Redox System ◽

Poly Ethylene Terephthalate ◽

Poly Ethylene

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Melting temperature versus crystallinity: new way for identification and analysis of multiple endotherms of poly(ethylene terephthalate)

Journal of Polymer Research ◽

10.1007/s10965-020-02327-7 ◽

2020 ◽

Vol 27 (12) ◽

Author(s):

Ferenc Ronkay ◽

Béla Molnár ◽

Dóra Nagy ◽

Györgyi Szarka ◽

Béla Iván ◽

...

Keyword(s):

Melting Temperature ◽

Crystallization Temperature ◽

Ethylene Terephthalate ◽

Primary Crystallization ◽

Crystallization Time ◽

X Ray Diffraction ◽

Molecular Weights ◽

Poly Ethylene Terephthalate ◽

Poly Ethylene ◽

Peak Set

AbstractPoly(ethylene terephthalate) (PET) materials with different molecular weights were isothermally crystallized from melt by systematically varying the temperature and duration of the treatment performed in the differential scanning calorimeter (DSC). Multiple endotherm peaks were observed on the subsequent heating thermograms that were separated from each other on the basis of their melting temperature versus crystallization temperature and melting temperature versus crystallinity function. By this new approach five sub-peak sets were identified and then comprehensively characterised. Wide-Angle X-Ray Diffraction (WAXD) analyses revealed that the identified sub-peak sets do not differ in crystalline forms. By analysing the crystallinity and the melting temperature of the sub-peak sets as a function of crystallization time, crystallization temperature and intrinsic viscosity, it was concluded that below the crystallization temperature of 460 K the sub-peak sets that were formed during primary or secondary crystallization transform partially or completely to a third sub-peak set during the heating run of the measurement, while above this temperature, the sub-peak set formed during primary crystallization gradually transforms to a more stable structure, with higher melting temperature. These formations and transformations are described with mathematically defined parameters as well.

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