38 research outputs found
Prospective Catalytic Structured Converters for NH3-SCR of NOx from Biogas Stationary Engines: In Situ Template-Free Synthesis of ZSM-5 Cu Exchanged Catalysts on Steel Carriers
Thermal and mechanical behaviour of flexible polyurethane foams modified with graphite and phosphorous fillers
New thermoplastic poly(carbonate-urethane) elastomers
Two series of novel thermoplastic poly(carbonate-urethane) elastomers, with different hard-segment content (30 - 60 wt %), were synthesized by melt polymerization from poly(hexane-1,6-diyl carbonate) diol of Mn = 2000 as a soft segment, 4,4'-diphenylmethane diisocyanate (MDI) or hexane-1,6-diyl diisocyanate (HDI) and 6,6'-[methylenebis(1,4-phenylenemethylenethio)]dihexan-1-ol as a chain extender. The structure and basic properties of the polymers were examined by Fourier transform infrared spectroscopy, X-ray diffraction analysis, atomic force microscopy, differential scanning calorimetry, thermogravimetric analysis, Shore hardness and tensile tests. The resulting TPUs were colorless polymers, showing almost amorphous structures. The MDI-based TPUs showed higher tensile strengths (up to 21.3 MPa vs. 15.8 MPa) and elongations at break (up to 550% vs. 425%), but poorer low-temperature properties than the HDI-based analogs
New thermoplastic poly(carbonate-urethane) elastomers
Two series of novel thermoplastic poly(carbonate-urethane) elastomers, with different hard-segment content (30 - 60 wt %), were synthesized by melt polymerization from poly(hexane-1,6-diyl carbonate) diol of Mn = 2000 as a soft segment, 4,4'-diphenylmethane diisocyanate (MDI) or hexane-1,6-diyl diisocyanate (HDI) and 6,6'-[methylenebis(1,4-phenylenemethylenethio)]dihexan-1-ol as a chain extender. The structure and basic properties of the polymers were examined by Fourier transform infrared spectroscopy, X-ray diffraction analysis, atomic force microscopy, differential scanning calorimetry, thermogravimetric analysis, Shore hardness and tensile tests. The resulting TPUs were colorless polymers, showing almost amorphous structures. The MDI-based TPUs showed higher tensile strengths (up to 21.3 MPa vs. 15.8 MPa) and elongations at break (up to 550% vs. 425%), but poorer low-temperature properties than the HDI-based analogs
New thermoplastic poly(carbonate-urethane)s based on diphenylethane-derivative chain extenders—the effect of chain extender structure on thermal and mechanical properties
The effect of chain extender structure on the properties of new thermoplastic poly(carbonate–urethane)s derived from MDI
Renewable-energy developments in Poland to 2020
The Polish [`]Development Strategy for Renewables', approved by the Council of Ministers in 2000 and by Parliament in 2001, called for a 7.5% contribution of renewable energy to total primary-energy production in 2010, and 14% in 2020 as development targets for renewables. The purpose of this project was to investigate further what this Strategy meant in terms of the types and amounts of renewable-energy (RE) systems that would need to be installed and the support mechanisms that would need to be put in place to enable this to happen. Development scenarios for RE to 2020 were elaborated and their financial, environmental and social implications were calculated with the Strategic Assessment Framework for the Implementation of Rational Energy (SAFIRE) computer model, devised by Energy for Sustainable Development Ltd (ESD, UK).Renewable energy Development strategy Simulation Externalities