Sökning: "Blowing agent"
Visar resultat 1 - 5 av 11 avhandlingar innehållade orden Blowing agent.
1. Flow, expansion and processing behaviours of gas-containing filled polyethylene
Sammanfattning : The utilization of fillers in polymeric materials has exhibited a substantial growth during the last decades. Chalk (calcium carbonate) and glass fibres are two common examples of such fillers. These fillers/reinforcing elements are used in order to reduce the cost of material and change its physical (mechanical) properties. LÄS MER
2. Blowing Agents in Rigid Polyurethane Foam - Analytical Studies - Technical and Environmental Aspects
Sammanfattning : Rigid polyurethane foam is used in many different applications because of its high insulating capacity. CFC-11 has been the predominant blowing agent due to its advantageous properties, especially its low thermal conductivity. LÄS MER
3. Foaming of Some Cellulose Derivatives - Initial Studies
Sammanfattning : Fossil-based polymeric foams, based on polymers such as polystyrene and polyurethane, are important and widely employed materials due to their good mechanical properties relative their low density, the low price and the possibility for large-scale production. There are however a few disadvantages with these foamed products. LÄS MER
4. Foaming of cellulose derivatives and hemicellulose-containing materials
Sammanfattning : Fossil-based polymeric foams are important materials due to their good mechanical properties relative their low density, the low price and the possibility for large-scale production. They are widely used in cushioning, absorbing and insulation applications. There are however a few disadvantages with these foamed products. LÄS MER
5. Insulation materials in district heating pipes : Environmental and thermal performance of polyethylene terephthalate and polyurethane foam
Sammanfattning : District heating can contribute to increased energy efficiency in society. The environmental impact can be reduced by minimising the heat losses in the district heating pipes during distribution of the heat to the customers. LÄS MER