Sökning: "thermal-degradation"
Visar resultat 1 - 5 av 44 avhandlingar innehållade ordet thermal-degradation.
1. Thermal Degradation and Adhesion Studies of Ethylene Copolymers
Sammanfattning : The thermal stability of ethylene(vinyl acetate) (EVA), ethylene(n-butyl acrylate) (EBA), ethylene(vinyl trimethoxy silane) (EVS) and ethylene(vinyl trimetoxy, butylacrylate) (EVSBA) copolymers have been mapped out in this study. The different ester groups', i.e. LÄS MER
2. Aerosols of Isocyanates, Amines and Anhydrides : Sampling and Analysis
Sammanfattning : This thesis presents methods for air sampling and determination of isocyanates, amines, aminoisocyanates and anhydrides. These organic compounds are generated during thermal degradation of polymers such as polyurethane (PUR) or epoxy.Isocyanates, amines and anhydrides are airway irritants known to cause occupational asthma. LÄS MER
3. Airborne Isocyanates, Aminoisocyanates and Amines
Sammanfattning : Isocyanates are used in the production of polyurethane (PUR). Exposure to isocyanates is associated with respiratory disorders and may occur during production or processing of PUR. During thermal degradation of PUR, amines and aminoisocyanates are formed in addition to isocyanates. LÄS MER
4. Microstructure and Thermal Degradation of PVC with Improved Thermal Stability
Sammanfattning : Although the low thermal stability of poly(vinyl chloride) (PVC) has been an area of intensive research, the relation between microstructure and degradation behaviour is still not fully understood. This thesis deals with the structure, thermal degradation and modification of ordinary PVC. LÄS MER
5. Aging effects on commercial lean NOx trap catalysts
Sammanfattning : As a countermeasure to global warming, vehicles with low carbon emissions are being investigated by promoting lean-burn engines and high combustion efficiencies. However, one limitation to the increasing use of these engines is the need to develop corresponding catalytic systems for controlling the nitrogen oxide (NOx) emissions in their lean exhaust. LÄS MER