Sökning: "differential scanning calorimetry DSC"

Visar resultat 21 - 25 av 57 avhandlingar innehållade orden differential scanning calorimetry DSC.

1. 21. Melt spinning of poly(vinylidene fluoride) mono- and bicomponent fibres and yarns : the formation of piezoelectric beta-phase crystallinity

   Författare :Anja Lund; Högskolan i Borås; []
   Nyckelord :fibres; PVDF; Textilteknologi;

   Sammanfattning : The present study investigates the possibilities of manufacturing piezoelectric polymer fibres or yarns for integration into textile materials. The polymers known to give the strongest piezoelectric effects are poly(vinylidene fluoride) (PVDF) and some of its copolymers. LÄS MER

3. 22. Analysis of dielectric response measurement methods and dielectric properties of resin-rich insulation during processing

   Författare :Anders Helgeson; KTH; []
   Nyckelord :;

   Sammanfattning : The dielectric diagnostic methods ofpolarisation/depolarisation currents and recovery voltage,which are time domain methods, and capacitance and tandmeasurements at different frequencies, which is a frequencydomain method, have been studied here. In the first part of thethesis, these measurement methods are analysed and evaluated. LÄS MER

4. 23. Long-term performance of poly(vinyl chloride) cables : mechanical and electrical performances and the effect of plasticizer migration

   Författare :Maria Ekelund; Ulf W. Gedde; Minna Hakkarainen; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Poly vinyl chloride cables; ageing; mechanical properties; plasticizer migration; Polymer chemistry; Polymerkemi;

   Sammanfattning : Cables insulated with plasticized poly(vinyl chloride) were aged at temperatures between 80 and 180 °C in air and their conditions were assessed by indenter modulus measurements, tensile testing, infrared (IR) spectroscopy, differential scanning calorimetry (DSC) and liquid chromatography (HPLC). Electrical testing of oven-aged cable samples was performed in order to relate the electrical functionality during a high-energy line break accident to the mechanical properties and to establish a lifetime criterion. LÄS MER

5. 24. Steelmaking slags as raw material for sulphoaluminate belite cement

   Författare :Daniel Adolfsson; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Process Metallurgy; Processmetallurgi;

   Sammanfattning : The present work was undertaken as part of the research in the Minerals and Metals Recycling research centre, MiMeR. The course of the thesis is attributed to metallurgical slags from the steelmaking industry and the possible use of such by-products as raw material for sulphoaluminate belite cement (SAB). LÄS MER

7. 25. Drugs and polymers in dissolving solid dispersions : NMR imaging and spectroscopy

   Författare :Carina Dahlberg; István Furó; Anna Millqvist-Fureby; Michael Schuleit; Jadwiga Tritt-Goc; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Physical chemistry; Fysikalisk kemi; Surface and colloid chemistry; Yt- och kolloidkemi; PHARMACY; FARMACI;

   Sammanfattning : The number of poorly water-soluble drug substances in the pharmaceutical pipeline is increasing, and thereby also the need to design effective drug delivery systems providing high bioavailability. One favourable formulation approach is preparation of solid dispersions, where dispersing a poorly water-soluble drug in a water-soluble polymer matrix improves the dissolution behaviour and the bioavailability of the drug. LÄS MER