Rheological Characterization and Thermal Stability of Different Intrinsic Viscosity Poly(ethylene terephthalate) in Air and Nitrogen
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Abstract
Four PET samples of different intrinsic viscosity values based on diverse manufacturing processes were characterized for their linear viscoelasticity using a parallel plate rheometer. Thermal stability and frequency sweep experiments were performed in the melt state at 270 °C. The influences of drying temperature, testing atmosphere (air or nitrogen), and preparation (granules vs. samples cut from compression molded sheets) were investigated. Results indicated that a higher drying temperature promoted complex viscosity significantly and compression molded sheets generated irreversible structural changes in harsh conditions. The samples measured in air decreased because of thermo-oxidation degradation, whereas that in nitrogen unexpectedly increased slightly because of polycondensation without surface renewal. The role of carboxyl end group towards PET thermal stability was found to be influenced by the atmosphere.
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- PPS News
- PPS News
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Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Estimation of Bulk Melt-Temperature from In-Mold Thermal Sensors for Injection Molding, Part B: Validation
- Online Measurement of Electrospinning Jet Velocity of Polyvinyl Alcohol
- Rheological Characterization and Thermal Stability of Different Intrinsic Viscosity Poly(ethylene terephthalate) in Air and Nitrogen
- Ethylene Methyl Acrylate Copolymer Toughened Poly(lactic acid) Blends: Phase Morphologies, Mechanical and Rheological Properties
- Comparative Effects of mEOC on the Structures and Properties of PP/SGF and PP/EOC/SGF Composite Foams
- Development of Styrenic Copolymers for Improving Heat Resistance of Poly(methyl methacrylate)
- Study of Dispersive and Distributive Mixing in a Converging Pipe
- Investigation of Surface Roughness and MRR for Engineering Polymers with the Abrasive Water Jet Turning Process
- Recycling the Cork Powder in a PVC-Based Composite Material: Combined Effect on Physico-Mechanical and Thermal Properties
- Influences on the Magnetic Properties of Injection Molded Multipolar Rings
- PMMA Micro-Pillar Forming in Micro Channel by Hot Embossing
- Experimental Investigation and Modeling of a New High Speed Coating Process
- Statistical Approach to Analyze the Warpage, Shrinkage and Mechanical Strength of Injection Molded Parts
- Optical Properties of HDPE in Injection Molding and Injection Press Molding for IR System Lenses
- PPS News
- PPS News
- Seikei Kakou Abstracts
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