Thermal Properties of Ester-Type Easy Cationic Dyeable Poly(ethylene Terephthalate) (ECDP) Polymers

This study investigated the thermal properties of ester-type easy cationic dyeable poly(ethylene terephthalate) (ECDP) polymers using differential scanning calorimetry (DSC), therogravimetric analysis (TGA). The mass ratios of 5-sodium sulfo bis(-hydroxyethyl) isophthalate(SIPE) for ECDP polymers were 2.8%, 5.5%, 6.8%, respectively. The fourth monomers were diethylene glycol adipate (DGA), diethylene glycol succinate (DGS) and diethylene glycol subacate (DES) with different contents. The results suggested that the Tg of ester-type ECDP decreased with the increasing the molecule weight of the fourth monomer at fixed SIPE and fourth monomer contents. The Tch of ECDP polymer to be lower than that of the CDP polymer with the same SIPE content. And it decreased as SIPE and fourth monomer contents increased, it also decreased with the increasing of the molecule weight of the fourth monomer given the same SIPE content. The effect of the ester-type soft segments reduced the Tm of ECDP. The thermal stability of ECDP polymer was less than PET and CDP polymers, and it decreased with increasing SIPE content, but increased with the ester-type fourth monomer content increasing.

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A study on the fracture, mechanical and thermal properties of chain extended recycled poly(ethylene terephthalate)

Journal of Thermoplastic Composite Materials ◽

10.1177/0892705715618740 ◽

2015 ◽

Vol 30 (8) ◽

pp. 1157-1172 ◽

Cited By ~ 7

Author(s):

Nevin Gamze Karsli

Keyword(s):

Thermal Properties ◽

Ethylene Terephthalate ◽

Chain Extender ◽

Mechanical And Thermal Properties ◽

Ftir Analysis ◽

Dsc Analysis ◽

Scanning Calorimetry ◽

Poly Ethylene Terephthalate ◽

Impact Modifier ◽

Poly Ethylene

The aim of this study is to simultaneously improve the mechanical strength and fracture toughness properties of recycled poly(ethylene terephthalate) (r-PET). For this purpose, Joncryl® was used as chain extender and Lotader® was used as impact modifier. The combined effect of chain extender and impact modifier on the chemical, fractural, mechanical, and thermal properties of r-PET was investigated. Fourier transformed infrared spectroscopy (FTIR) analysis, EWF analysis, tensile test, and differential scanning calorimetry (DSC) analysis were performed. FTIR analysis revealed that all the epoxy groups in the Joncryl® were consumed during the compounding. EWF results showed that while toughness of r-PET decreased with the addition of Joncryl®, toughness was increased with addition of impact modifier Lotader®. It was found that 2.5% Lotader® usage at the same time with Joncryl® increased the tensile strength of r-PET as well as toughness. It was observed from DSC analysis that chain extender and impact modifier addition did not change the thermal transition temperatures of r-PET.

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Synthesis, thermal properties, and crystallization kinetics of novel biodegradable poly(ethylene succinate-co-diethylene glycol succinate) copolyesters

Thermochimica Acta ◽

10.1016/j.tca.2015.03.004 ◽

2015 ◽

Vol 606 ◽

pp. 45-52 ◽

Cited By ~ 12

Author(s):

Peng Xue ◽

Zhaobin Qiu

Keyword(s):

Thermal Properties ◽

Crystallization Kinetics ◽

Diethylene Glycol ◽

Glycol Succinate ◽

Biodegradable Poly ◽

Diethylene Glycol Succinate ◽

Poly Ethylene ◽

Kinetics Of

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Comparative Study of Structural Changes of Polylactide and Poly(ethylene terephthalate) in the Presence of Trichoderma viride

International Journal of Molecular Sciences ◽

10.3390/ijms22073491 ◽

2021 ◽

Vol 22 (7) ◽

pp. 3491

Author(s):

Grażyna B. Dąbrowska ◽

Zuzanna Garstecka ◽

Ewa Olewnik-Kruszkowska ◽

Grażyna Szczepańska ◽

Maciej Ostrowski ◽

...

Keyword(s):

Structural Changes ◽

Ethylene Terephthalate ◽

Molecular Mechanisms ◽

Blot Hybridization ◽

Trichoderma Viride ◽

Cost Effective ◽

Plastic Pollution ◽

Scanning Calorimetry ◽

Poly Ethylene Terephthalate ◽

Poly Ethylene

Plastic pollution is one of the crucial global challenges nowadays, and biodegradation is a promising approach to manage plastic waste in an environment-friendly and cost-effective way. In this study we identified the strain of fungus Trichoderma viride GZ1, which was characterized by particularly high pectinolytic activity. Using differential scanning calorimetry, Fourier-transform infrared spectroscopy techniques, and viscosity measurements we showed that three-month incubation of polylactide and polyethylene terephthalate in the presence of the fungus lead to significant changes of the surface of polylactide. Further, to gain insight into molecular mechanisms underneath the biodegradation process, western blot hybridization was used to show that in the presence of poly(ethylene terephthalate) (PET) in laboratory conditions the fungus produced hydrophobin proteins. The mycelium adhered to the plastic surface, which was confirmed by scanning electron microscopy, possibly due to the presence of hydrophobins. Further, using atomic force microscopy we demonstrated for the first time the formation of hydrophobin film on the surface of aliphatic polylactide (PLA) and PET by T. viride GZ1. This is the first stage of research that will be continued under environmental conditions, potentially leading to a practical application.

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