Synthesis of Semi-Aromatic Copolyester with High Molecular Weight

Jiang Wei Wang; Hua Jun Xu; Xiao Mei Bai; Fan Hong; Yan Ping Wang; Yi Min Wang

doi:10.4028/www.scientific.net/AMM.598.82

Paper Titles

Summary of Progress in Extracting Vanadium
p.60

Effect of Functional Groups on Interfacial Adhesion Properties of PEEK/Carbon Fiber Composites
p.66

Experimental Investigations to Evaluate the Mechanical Properties and Behavior of Raw and Alkali Treated King’s Crown (Calotropis Gigantea) Fiber to be Employed for Fabricating Fiber Composite
p.73

Tunable Nanostructures and Sers Activities of Sputtered Thin Silver Films
p.78

Synthesis of Semi-Aromatic Copolyester with High Molecular Weight
p.82

The Pyrolysis Behavior of Alkali Lignin Oxygenized by Hydrogen Peroxide in Ionic Liquid 1-Butyl-3-Methylimidazolium Chloride ([BMIm]Cl)
p.86

Effect of Carburizing Atmosphere Proportion on Low Temperature Plasma Carburizing of Austenitic Stainless Steel
p.90

Effect of Laser Power on Microstructure and Properties of CBN Coating by Laser Cladding on TC11 Titanium Alloy
p.94

Effects of Texture on the Fracture Mechanism of AZ31 Magnesium Alloy under Dynamic Impact
p.98

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 598Synthesis of Semi-Aromatic Copolyester with High...

Synthesis of Semi-Aromatic Copolyester with High Molecular Weight

Abstract:

The polymerization of para-acetoxybenzoic acid (PABA) and poly (ethylene terephthalate) to generate high molecular weight semi-aromatic copolyester was conducted successfully in the presence of acetic anhydride. The influence of acetic anhydride on the copolymerization was studied. The addition of acetic anhydride (2:1 mol AC₂O /PET) in the polymerization system afforded the polymerized copolyester with an increased intrinsic viscosities (by 112.5%) and a decreased amount of insoluble fraction (by 80%). ¹H-NMR analysis indicated that mole ratio of PET repeat unit and PHB was 42:58 with the addition of acetic anhydride, which was quite similar to the theoretical ratio and higher than traditional synthesized PET/PHB. The results show that the addition of acetic anhydride is effective not only in increasing the molecular weight but also in increasing benzene ring content in the copolyester.