Sökning: "stabilizer"

Visar resultat 11 - 15 av 67 avhandlingar innehållade ordet stabilizer.

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

   Författare :Sohail Nawaz; Ulf Gedde; Mikael Skrifvars; KTH; []
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER

3. 12. Stabilizers in crosslinked polydimethylsiloxane

   Författare :Kamyar Fateh-Alavi; KTH; []
   Nyckelord :Polymer; Material Science; Polydimethylsiloxane; Stabilizers;

   Sammanfattning : The loss and recovery of the surface hydrophobicity areimportant phenomena when highvoltage insulators, with a shedmaterial composed of polydimethylsiloxane (PDMS), are used. Theloss of hydrophobicity is mostly due to the oxidativecrosslinking which takes place on the PDMS surface duringexposure to electrical discharges, e. g. corona discharges. LÄS MER

4. 13. Aluminium oxide - poly(ethylene-co-butylacrylate) nanocomposites : synthesis, structure, transport properties and long-term performance

   Författare :Patricia Nordell; Ulf Gedde; Lars Wågberg; Minna Hakkarainen; KTH; []
   Nyckelord :nanocomposite; nanoparticles; aluminium oxide; poly ethylene-co-butyl acrylate ; silanization; dispersion; Irganox 1010; antioxidant; OIT; sorption kinetics; water; nanokomposit; nanopartiklar; aluminium oxid; poly eten-co-butyl akrylat ; silanisering; dispergering; Irganox 1010; antioxidant; OIT; vattenupptag.;

   Sammanfattning : Polymer nanocomposites are promising materials for dielectrical use in high voltage applications and insulations. This work presents a study of nanocomposites based on poly(ethylene-co-butyl acrylate) with two different comonomer compositions and two different aluminium oxide nanoparticles. LÄS MER

5. 14. Heterogeneous Degradation and Recyclability of PP Studied by Imaging Chemiluminescence

   Författare :Mikael Hamskog; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Teknik; Technological sciences; recyclability; mapping; surface; heterogeneity; heterogeneous; evaporation; ageing; hamamatsu; russel; ICL; CL; Irganox 1010; Irganox 1076; oxidation; hydroperoxide; radical; carbonyl; luminescence; chemiluminescence; imaging chemiluminescence; recycling; stabilization; polypropylene; degradation;

   Sammanfattning : Oxidative degradation is a serious threat to long-term use and recyclability of polymers. Successful recycling of polymeric quality products requires characterization of the polymer material after reprocessing and use. LÄS MER

7. 15. Cardiometabolic risk indicators in bipolar disorders

   Författare :Hemen Najar; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Bipolar disorders; Cardiometabolic risk indicators; Cardiovascular diseases;

   Sammanfattning : In addition to disabling mood episodes, bipolar disorders (BDs) predispose individuals to high cardiovascular disease (CVD) risk. This thesis explores the association between BDs and the metabolic risk indicators body mass index (BMI), waist-to-hip ratio (WHR), blood pressure, and lipid profile. LÄS MER