Search for dissertations about: "long-term ageing"

Showing result 1 - 5 of 97 swedish dissertations containing the words long-term ageing.

  1. 1. Activity and participation long term after stroke

    Author : Anna Norlander; Institutionen för hälsovetenskaper; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Assessment instruments; ICF; Leisure activities; Long-term; Participation; Predictors; Rehabilitation; Social activities; Stroke; Qualitative Research;

    Abstract : Background and aim: As an increasing number of people are living and ageing with the consequences ofstroke, the rehabilitation and support provided for this group needs to have a long-term perspective. Moreover,to prevent long-term activity limitations and participation restrictions after stroke, increased knowledge is neededregarding how engagement in different types of activities develops beyond the first years of recovery andadaptation. READ MORE

  2. 2. Preparation and long-term performance of poly(ethylene-co-butyl acrylate) nanocomposites and polyethylene

    Author : Sohail Nawaz; Ulf Gedde; Mikael Skrifvars; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymer nanocomposite; nanoparticles; aluminium oxide; poly ethylene-co-butyl acrylate ; long-term performance; ageing; antioxidant; OIT; aqueous media; silanization; irganox 1010; deltamethrin; piperonyl butoxide; chlorine dioxide; migration of stabilizer; SRA - Production; SRA - Produktion;

    Abstract : The current study discusses the preparation and long-term performance of polymer composites used for various purposes under different ageing conditions.The first part deals with the preparation and characterization of polymer nanocomposites based on poly(ethylene-co-butyl acrylate) (EBA–13 and EBA–28 with 13 and 28 wt % butyl acrylate, respectively) and 2–12 wt % (0. READ MORE

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

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

    Abstract : 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. READ MORE

  4. 4. Long-term Properties of Sustainable Polymeric Materials : Mechanical Recycling and Use of Renewable Resources

    Author : Emma Strömberg; Sigbritt Karlsson; Amparo Ribes-Greus; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Sustainable materials; mechanical recycling; polyolefin; reprocessing; accelerated ageing; chromatography; biofilm; microenvironment chamber; environmental degradation; biocomposite; nanocomposite; Polymer chemistry; Polymerkemi;

    Abstract : New strategies for management of the accumulating amounts of plastic waste are required, to achieve a sustainable development in terms of material production and use. After service life, the materials should be recovered and recycled efficiently to provide a valuable resource for future applications. READ MORE

  5. 5. Predicting the Long-Term Insulation Performance of District Heating Pipes

    Author : Camilla Persson; Chalmers University of Technology; []
    Keywords : heat conduction; polyurethane foam; insulation capacity; diffusion; thermal conductivity; cyclopentane; solubility coefficient; long-term performance;

    Abstract : The aim of the studies that comprise this thesis was to predict the heat loss over timefrom a range of district heating pipes insulated with closed-cells foam. The thermalconductivity of the foam changes over time when it is not diffusion-tight encapsulatedagainst the environment, as diffusion alters the cell gas composition until it reachesequilibrium with the surrounding air. READ MORE