Sökning: "polymers"

Visar resultat 11 - 15 av 1085 avhandlingar innehållade ordet polymers.

  1. 11. Synthesis of Conjugated Polymers for Solar Cell Applications

    Författare :Desta Antenehe Gedefaw; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polyfluorenes; Conjugated polymers; Donor-acceptor miscibility; Black polymers; Optical absorption;

    Sammanfattning : Fossil fuels are largely used as a source of energy to fulfil the energy demand of mankind. However, fossil fuels suffer from limitations. The unlimited burning of fossil fuels releases greenhouse gases and causes environmental pollution. Fossil fuels are also an unreliable source of energy since the natural deposit is limited. LÄS MER

  3. 12. Free Volume Determination in Polymers and Polymer Blends

    Författare :Camilla Wästlund; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; positronium formation; crystallinity; polymer blends; inhibition; polymers; free volume; positron annihilation; phase separation; distribution;

    Sammanfattning : The free volume of a polymer, which corresponds to the unoccupied regions accessible to segmental motions, is an important parameter for understanding and predicting many of its characteristic properties. The concept of free volume is the basis for understanding the molecular mobility in polymers. LÄS MER

  4. 13. Thermoplastic processing of starch and cellulose-containing polymers

    Författare :Mats Thunwall; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermoplastic starch; amylose; extrusion; injection moulding; polymers; cellulose; film blowing; composite;

    Sammanfattning : Starch and cellulose are two naturally occurring polymers that have the potential to reduce the dependence on fossil resources if used as replacements or as complements to synthetic polymers. There are however some problems associated with the use of these polymers that have to be addressed and solved. LÄS MER

  5. 14. Thermoset polymers and coatings subjected to high compressive loads

    Författare :Daniel Ståhlberg; Mats Johansson; Gijsbertus de With; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; polymers; organic coating; thermoset; mechanical properties; compression; Surface engineering; Ytbehandlingsteknik;

    Sammanfattning : This study describes the mechanical response of thermoset polymers under high compressive loads. The study is divided into two parts. The first part focuses on the behaviour of a powder coating when used in a clamping force joint and how the properties vary when the chemical and physical structure of the coating is changed. LÄS MER

  7. 15. Antioxidant-Impregnated Polymers / Antioxidant Ability and Interactions with Food

    Författare :Carolina Wessling; Avdelningen för livsmedel och läkemedel; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Food and drink technology; shelf-life; interactions; packaging; polymers; BHT; antioxidants; a-tocopherol; Livsmedelsteknik;

    Sammanfattning : Interactions between antioxidant-impregnated low-density polyethylene (LDPE) and polypropylene (PP), and oxygen-sensitive foods have been investigated. BHT and a-tocopherol are two antioxidants commonly used in both foods and polymers. In general, BHT was rapidly lost from LDPE film in contact with various foodstuffs. LÄS MER