Synthesis and Properties of Nitrogen Heterocycle-Functionalized Core-Shell Hyperbranched Polyester
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S. Karpagam
und S. Guhanathan
Abstract
Core-shell hyperbranched polyesters (HBPE) of third generation prepared from 2,2′-bis (hydroxymethyl) propionic acid (Bis-MPA) as an ABx monomer and N-heterocyclic (indole, piperidine and piperazine) phosphoryl dichloride as a core molecule by melt condensation process. These polymers were characterized by FT-IR, 1H NMR, 13C NMR, 31P NMR, elemental analysis, and MALDI spectroscopy. The thermal behavior of the polymers has been investigated by thermo gravimetric analysis (TGA) and differential scanning calorimetry (DSC). There is no weight loss observed until 250 °C under nitrogen atmosphere. DSC showed that the glass transition temperatures was about −14 and −30 °C for the prepared core-shell HBPE. The dielectric properties such as dielectric constant and loss factor for these polyesters were also studied with respect to change of frequency (50 Hz to 5 MHz).
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Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Multilayer Coextrusion of Polymer Composites to Develop Organic Capacitors
- Heat Flow Analysis and Efficiency Optimization of Rotational Molding Equipment for Large Plastic Products
- Thermorheology of Polyethylene Wax Modified Sulfur Asphalt
- Thermoplastic Cellulose Stearate and Cellulose Laurate: Melt Rheology, Processing and Application Potential
- Crystallization Kinetics for PP/EPDM/Nano-CaCO3 Composites – The Influence of Nanoparticles Distribution
- The Effect of ZnO Nanoparticle Filler on the Attenuation of ZnO/PCL Nanocomposites Using Microstrip Line at Microwave Frequency
- Synthesis and Properties of Nitrogen Heterocycle-Functionalized Core-Shell Hyperbranched Polyester
- Morphology Tuning of Conducting Polyaniline via Static, Liquid-Liquid Interfacial Polymerization Process and its Application for Optical pH Sensing
- Tuning of Final Performances of Soybean Oil–Based Polymer Nanocomposites: Effect of Styryl/Oil Functionalized Intercalant of Montmorillonite Reinforcer
- Processability, Thermal and Mechanical Properties of Rigid PVC/Kaolin Coated with Liquid Macromolecular Modifier Composites
- Numerical Analysis and Evaluation of Process and Geometry Specific Transient Temperature Fields for a New Variation of Gas-Assisted Injection Molding
- Effect of Feeding Strategy on the Properties of PP/Recycled EPDM Blends
- Analysis of a Single Screw Extruder with a Grooved Plasticating Barrel – Part I: The Melting Model
- Melt Elongation Strength and Drawability of LDPE/LLDPE Blends
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei Kakou Abstracts