A5053481121- Flame retardant materials and properties
- Polymer Foaming and Composites
- biodegradable polymer synthesis and properties
- Synthesis and properties of polymers
- Polymer crystallization and properties
- Rheology and Fluid Dynamics Studies
- Polymer Nanocomposites and Properties
- Fire dynamics and safety research
- Carbon dioxide utilization in catalysis
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organophosphorus compounds synthesis
- Material Dynamics and Properties
- Tribology and Wear Analysis
- Additive Manufacturing and 3D Printing Technologies
- Synthesis of Organic Compounds
- Synthetic Organic Chemistry Methods
- Fashion and Cultural Textiles
University of Bayreuth
2011-2019
Abstract Aluminium diethylphosphinate (AlPi-Et) and inorganic aluminium phosphinate with resorcinol-bis(di-2,6-xylyl phosphate) (AlPi-H+RXP) were compared each other as commercially available halogen-free flame retardants in poly(butylene terephthalate) (PBT) well glass-fibre-reinforced PBT (PBT/GF). Pyrolysis behaviour retardancy performance are reported detail. AlPi-H+RXP released phosphine at very low temperatures, which can become a problem during processing. AlPi-Et provided better...
Foams from engineering thermoplastics like poly(butylene terephthalate) (PBT) are a new generation of polymer foams and, probably, the future for lightweight, insulation and damping materials. By means foam extrusion or bead foaming, it is possible to achieve low-to-medium density (< 500 kg/m 3 ). However, PBT quite challenging due its low melt strength drawability combined with small temperature-processing window, which characteristic semi-crystalline thermoplastics. This work proves...
The incorporation of nanoparticles to polymer foams not only reinforces the cell walls and struts but can also lead a decrease size enhanced morphology which in turn, yield with superior mechanical properties. For this purpose, several studies have focused on identifying close-to-ideal nucleating agents as well understanding influence processing parameters foam morphology. This research provides systemic approach low-density polystyrene produced graphene (thermally reduced graphite oxide),...
Abstract Pyrolysis, fire behaviour and mechanical properties of a blend poly(butylene terephthalate) (PBT) with phosphorus polyester (PET‐P‐DOPO) are investigated compared PBT/aluminium diethylphosphinate (AlPi‐Et) composites. The PBT/PET‐P‐DOPO is immiscible exhibits gas‐phase condensed‐phase activity, whereas AlPi‐Et in PBT results mainly flame inhibition. Only higher loadings yield significant activity. Using the same content, PBT/AlPi‐Et exhibit similar reductions load (22%) spread (17%...
Abstract Flame retardancy for thermoplastics is a challenging task where chemists and engineers work together to find solutions improve the burning behavior without strongly influencing other key properties of material. In this work, halogen‐free additives aluminum diethylphosphinate (AlPi‐Et) mixture phosphinate (AlPi) resorcinol‐bis(di‐2,6‐xylyl phosphate) (AlPi‐H + RXP) are employed in neat reinforced poly(butylene terephthalate) (PBT), morphology, mechanical performance, rheological...
Abstract Flame retarded poly(butylene terephthalate) (PBT) is required for electronic applications and mostly achieved by low molar mass additives so far. Three phosphorus‐containing polyesters are suggested as halogen‐free polymeric flame retardants PBT. retardancy was according to cone calorimeter experiments showing that the peak heat release rate total evolved were reduced because of inhibition condensed‐phase activity. The presented polymers containing derivatives...
Abstract Different approaches were applied to obtain new diol compounds based on dibenzo[c.e][1,2]oxaphosphorine 2‐oxide (DOPO, 1 ) and diethanolamine (DEolA). Of four processes investigated, a four‐step synthesis of containing propionic acid amide DEolA proved be the most efficient one. In addition, intramolecular amine salt DOPO derivative with ring‐opened structure was obtained by reinvestigation reaction paraformaldehyde. The Atherton–Todd investigated as well. © 2011 Wiley Periodicals,...
Phosphorus polyesters provide sustainable flame retardancy to conventional like PET (poly(ethylene terephthalate)) and PBT (poly(butylene terephthalate)). Their use as a retardant additive results in the formation of classical polymer blend. The morphology such blends should determine resulting fire behavior has therefore be examined detail. This study investigates state miscibility standard (mainly PBT) with phosphorus (co)polyesters mainly using glass transition ( T g ). values were...
This work focuses on the development of foamed high temperature thermoplastic substrates for printed circuit boards. For this application it is necessary to achieve mean cell diameters smaller than 30 µm in order be able realize vias and packaging densities (miniaturization). Different additives as nucleating agents, namely macro- micro-crystalline talc, silica, calcium carbonate, wollastonite, were melt-compounded with polyetherimide using a twin-screw extruder. Foamed samples are prepared...
Understanding the concept of rheology in polymer melts with dissolved gases like CO2 is crucial development high quality foams which are commonly manufactured by foam extrusion processes. The crystallization and rheological properties melt significantly affected gas, acts as a blowing agent at same time plasticizer. Moreover, gas-loaded influence on efficient design dies toward production popular homogenous lightweight foams. This chapter will discuss common methods to measure these example...