Rheological/thermal properties of poly(ethylene terephthalate) modified by chain extenders of pyromellitic dianhydride and pentaerythritol

2020 ◽  
Vol 138 (9) ◽  
pp. 49917
Author(s):  
Saeed Dolatshah ◽  
Shervin Ahmadi ◽  
Amir Ershad‐Langroudi ◽  
Hedieh Jashni
Keyword(s):  
Thermal Properties ◽  
Ethylene Terephthalate ◽  
Pyromellitic Dianhydride ◽  
Poly Ethylene Terephthalate ◽  
Chain Extenders ◽  
Poly Ethylene

Structural characterization and thermal properties of poly(ethylene terephthalate) copolymers containing 2-butyl-2-ethyl-1,3-propanediol

2002 ◽  
Vol 86 (5) ◽  
pp. 1077-1086 ◽  
Author(s):  
Darwin P. R. Kint ◽  
Antxou Martínez de Ilarduya ◽  
Antoni Sansalvadó ◽  
Josep Ferrer ◽  
José I. Iribarren ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Structural Characterization ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Structural and thermal properties of modified poly(ethylene terephthalate)

2009 ◽  
Vol 41 (1) ◽  
pp. 22-25 ◽  
Author(s):  
S. G. Alekseeva ◽  
B. E. Geller ◽  
N. N. Gorodetskii ◽  
E. V. Kovaleva ◽  
Yu. M. Mozheiko ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Calix[4]arenes Used as a New Type of Chain Extender in the Preparation of Polyurethanes

2007 ◽  
Vol 60 (3) ◽  
pp. 167 ◽  
Author(s):  
Qin Zheng ◽  
Shuling Gong ◽  
Haiqing Dong ◽  
Yuanyin Chen
Keyword(s):  
Ethylene Terephthalate ◽  
Toluene Diisocyanate ◽  
Elongation At Break ◽  
Poly Ethylene Terephthalate ◽  
Solvent Type ◽  
Lower Yield Strength ◽  
New Type ◽  
Chain Extenders ◽  
Poly Ethylene ◽  
Hydroxy Groups

A series of polyether– or polyester–polyurethanes based on tetrahydrofuran–propylene oxide copolyether diol (PTMG/PPG) or poly(ethylene terephthalate) diol (PET), toluene diisocyanate (TDI), and three kinds of chain extenders including two calix[4]arene derivatives and 3,3´-dichloro-4,4´-diaminodiphenylmethane (MOCA) were synthesized in toluene. The thermal stability and mechanical properties of solvent-type polyurethanes were investigated. Incorporation of calixarenes into polyurethane backbones improved the thermal properties of the polyurethane as a result of the residual phenol hydroxy groups of the calix[4]arene units. Compared with polyurethane chain-extended by MOCA, the polyurethanes with calix[4]arene derivatives had higher elongation at break, lower elastic modulus, and lower yield strength, as a result of the larger steric cubage of calix[4]arene units and relatively large free volume of the polymer.

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

2010 ◽  
Vol 44-47 ◽  
pp. 2409-2413 ◽  
Author(s):  
Yu Sun ◽  
Guo Zheng ◽  
Hong Xiang Yang ◽  
Yan Jun Liu ◽  
Xiao Ning Li
Keyword(s):  
Thermal Properties ◽  
Diethylene Glycol ◽  
Ethylene Terephthalate ◽  
Glycol Succinate ◽  
Glycol Adipate ◽  
Scanning Calorimetry ◽  
Poly Ethylene Terephthalate ◽  
Monomer Content ◽  
Diethylene Glycol Succinate ◽  
Poly Ethylene

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.

Improving the properties of recycled PET/PEN blends by using different chain extenders

2016 ◽  
Vol 36 (6) ◽  
pp. 615-624 ◽  
Author(s):  
Simge Can ◽  
N. Gamze Karsli ◽  
Sertan Yesil ◽  
Ayse Aytac
Keyword(s):  
Ethylene Terephthalate ◽  
Chain Extender ◽  
Degree Of Crystallinity ◽  
Recycled Pet ◽  
H Nmr ◽  
Loading Level ◽  
Poly Ethylene Terephthalate ◽  
Chain Extenders ◽  
Izod Impact ◽  
Poly Ethylene

Abstract The main aim of this study was to improve the mechanical properties of the recycled poly(ethylene terephthalate)/poly(ethylene 2,6-naphthalate) (r-PET/PEN) blends by enhancing the miscibility between PET and PEN with the usage of chain extenders. This idea was novel for the recycled PET-based r-PET/PEN blends, as investigation of the effects of the chain extender usage on the properties of r-PET/PEN blends has not been studied in the literature, according to our knowledge. 1,4-Phenylene-bis-oxazoline (PBO), 1,4-phenylene-di-isocyanate (PDI), and triphenyl phosphite (TPP) were selected as chain extenders. The maximum tensile strength value was observed for the 1.0PDI sample. Moreover, PDI-based blends exhibited better Izod impact strength when compared with all other samples. The miscibility and degree of crystallinity values of all blends were discussed by means of thermal analysis. 1H-nuclear magnetic resonance (1H-NMR) analysis was carried out to determine transesterification reaction levels. According to 1H-NMR results, the increase in the level of transesterification was around 40% with the usage of PDI. The optimum loading level for selected chain extenders was determined as 1 wt.%, and PDI-based blends exhibited better properties when compared with those of the blends based on PBO and TPP at this loading level.

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