Melt polycondensation of poly(ethylene terephthalate) in a rotating disk reactor

1995 ◽  
Vol 58 (9) ◽  
pp. 1473-1483 ◽  
Author(s):  
Seong Ill Cheong ◽  
Kyu Yong Choi
Keyword(s):  
Ethylene Terephthalate ◽  
Rotating Disk ◽  
Melt Polycondensation ◽  
Poly Ethylene Terephthalate ◽  
Rotating Disk Reactor ◽  
Poly Ethylene

Kinetics of Mass Transfer in the Melt Polycondensation of Poly(Ethylene Terephthalate)

1985 ◽  
Vol 22 (10) ◽  
pp. 1413-1427 ◽  
Author(s):  
Gerald Rafler ◽  
Gerhard Reinisch ◽  
Eckhard Bonatz ◽  
Heinz Versaumer ◽  
Herbert Gajewski ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Ethylene Terephthalate ◽  
Melt Polycondensation ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Kinetics Of

scholarly journals Synthesis of a Bio-based and Biodegradable Poly(ethylene-co-isosorbide [2,2'-bithiophene]-5,5'-dicarboxylate) with enhanced Thermal and Degradability Properties

2021 ◽  
Author(s):  
Dasilva Wandji ◽  
Naomie Beolle Songwe Selabi
Keyword(s):  
Ethylene Terephthalate ◽  
Tensile Modulus ◽  
Barrier Properties ◽  
The Novel ◽  
Melt Polycondensation ◽  
Poly Ethylene Terephthalate ◽  
Ligand Free ◽  
Biodegradable Poly ◽  
Palladium Catalyzed ◽  
Poly Ethylene

Abstract In this investigation, a synthetic biopolymer prepared from bithiophene monomer, isosorbide and ethylene glycol, was synthesized through melt polycondensation. The result showed the polyesters to possess promising thermal and mechanical properties. The bithiophene monomer, [2,2'-bithiophene]-5,5'-dicarboxylicacid acid, was synthesized from a palladium-catalyzed, phosphine ligand-free direct coupling protocol, using polyethylene glycol palladium (Pd/PEG) as catalyst. The procedure was found effective at polymerizing the bithiophene monomer with isosorbide and glycol. The bithiophene polyester displayed several intriguing properties among good thermal resistance, crystallinity and high tensile modulus. Additionally, the bithiophene monomer coupled to isosorbide enhanced the polyester with a comparatively high glass transition temperature. Films cast out these polyesters display excellent oxygen and water barrier properties, and were interestingly superior to those of poly(ethylene terephthalate). Moreover, the novel polyester also has good soil degradability properties.

Synthesis and Characterization of Branched Poly(Ethylene Terephthalate)

2013 ◽  
Vol 815 ◽  
pp. 738-741
Author(s):  
Yan Ming Chen ◽  
Dan Zhao ◽  
Li Yan Wang ◽  
Quan Cai Wu
Keyword(s):  
Terephthalic Acid ◽  
Ethylene Terephthalate ◽  
Raw Materials ◽  
Synthesis And Characterization ◽  
Melt Polycondensation ◽  
Poly Ethylene Terephthalate ◽  
Polyfunctional Monomer ◽  
Polycondensation Process ◽  
Poly Ethylene

Linear and branched poly (ethylene terephthalate) were prepared by using terephthalic acid, ethylene glycol as main raw materials and pentaerythritol as polyfunctional monomer through melt polycondensation method. The samples were characterized with respect to intrinsic viscosity and differential scanning calorimeter (DSC). The results show that the low branched poly (ethylene terephthalate) could be obtained by the addition of tertrafunctional pentaerythritol through common melt polycondensation process.

scholarly journals Synthesis and Properties of Thermotropic Copolyesters Based on Poly(ethylene terephthalate) and 4′-Acetoxy-4-biphenyl-carboxylic Acid

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1720
Author(s):  
Pavel A. Mikhaylov ◽  
Kirill V. Zuev ◽  
Marina P. Filatova ◽  
Boris Kh. Strelets ◽  
Valery G. Kulichikhin
Keyword(s):  
Carboxylic Acid ◽  
Ethylene Terephthalate ◽  
Mechanical Characteristics ◽  
Glassy Phase ◽  
Melt Polycondensation ◽  
Poly Ethylene Terephthalate ◽  
Synthetic Procedure ◽  
Storage And Loss Moduli ◽  
Improved Performance ◽  
Poly Ethylene

A series of novel copolyesters based on polyethylene terephthalate (PET) and 4′-hydroxy-biphenyl-4-carboxylic acid (HBCA) was obtained by melt polycondensation of bis(2-hydroxyethyl) terephthalate and 4’-acetoxybiphenyl-4-carboxylic acid (ABCA) as co-monomers with Sb2O3 as a catalyst. Using this synthetic procedure, a set of copolymers containing 20–80 mol% of HBCA units was prepared. According to NMR spectroscopy, the copolymers were of random composition. Copolyesters comprising 60–80 mol% of HBCA possessed increased heat resistance and formed nematic melts at 270 °C and higher. The liquid crystal (LC) phase formation was accompanied by transition to non-Newtonian characteristics of the melt flow, as well as an equalization of storage and loss moduli values. According to XRD and polarizing microscopy, the LC glassy phase of the copolyesters coexists with crystalline regions of poly-(4’-hydroxy-4-biphenylcarboxylate), non-melting up to 400 °C and above. The mechanical characteristics of these LC copolyesters showed similar or better values than those of well-known LC polymers. These novel copolyesters can be useful in obtaining heat-resistant materials with an ordered structure and, as a consequence, improved performance.

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