Rheological, Mechanical and Thermal Properties of Polytrimethylene Terephthalate

Abstract

The rheological, mechanical properties and thermal behaviors of polytrimethylene terephthalate were investigated. The results show that: The critical shear rate decreased with an increase in molecular weight, and also increased with a rise in temperature. Zero shear viscosity increased with an increase in molecular weight and decreased with a rise in temperature. The a-relaxation peak was clearly seen at about 70 C. The loss modulus of high molecular weight PTT decreased rapidly. The glass transition temperature of PTT was about 72 C. The thermal degradationof PTT occurred in the temperature range of 400 C-467 C, and the maximum heat loss temperature was 439 C.

Effect of Zn+2Poly(ethylene-co-methacrylic acid) Ionomer on Mechanical Properties, Thermal Properties, Morphology and Process Rheology of Acrylonitrile Styrene Acrylate (ASA) Terpolymer

“…The apparent viscosity of the blends and ASA decreases with an increase in shear rate, indicating that both ASA and all the blend composition showed psedudoplastic shear-thinning melt. This can be explained by the fact that flexible molecular chains are in randomly coiled form without any application of shear to the melt, but as the shear rate is increased, the flow field orients the molecular chains in the direction of the flow field and reduce the intermolecular forces [38] .…”

Fracture Behavior of Poly(trimethylene terephthalate) Toughened by Maleic Anhydride Grafted Styrene-Ethylene-Butadiene-Styrene Block Copolymer

“…Poly(trimethylene terephthalate) (PTT) is a linear aromatic polyester with better elasticity, dimension stability and dyeability compared with other polyesters such as poly (ethylene terephthalate) (PET) and poly(butylene terephthalate) (PBT), and it has wide application in the field of textile [1][2][3][4][5][6][7] . Furthermore, PTT is also a semicrystalline polymer, and its crystallization ability is relatively better than PET [8] , which endows it with great potential application as an engineering plastic.…”