Search for dissertations about: "polymer degradation products"

Showing result 1 - 5 of 55 swedish dissertations containing the words polymer degradation products.

  1. 1. Degradation of polyethylene pipes distributing chlorinated water : depletion of stabilizers, release of degraded products and polymer degradation

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Wenbin Yu; KTH.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; polyethylene pipes; chlorine dioxide; degradation; NATURAL SCIENCES Chemistry Organic chemistry Polymer chemistry; NATURVETENSKAP Kemi Organisk kemi Polymerkemi;

    Abstract : This thesis presents the study of antioxidants depletions in chlorinated media (10 ppm Cl2 - and ClO2 - aqueous media), polyethylene pipes degradations scenarios and migration of the degraded species to aqueous phase. Pressure testing on pipes and squalane testing with controlled pH aqueous media (6.8 ± 0. READ MORE

  2. 2. SALDI-MS Method Development for Analysis of Pharmaceuticals and Polymer Degradation Products

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Nina Aminlashgari; KTH.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Surface assisted laser desorption ionization-mass spectrometry SALDI-MS ; polyester degradation products; pharmaceutical compounds; nanoparticles; nanocomposites.;

    Abstract : Surface assisted laser desorption ionization-mass spectrometry (SALDI-MS) was evaluated as a new tool for analysis of polymer degradation products. A SALDI method was developed enabling rapid analysis of low molecular mass polyesters and their degradation products. READ MORE

  3. 3. Controlling Polylactide Degradation through Stereocomplexation and Lactic Acid Based Additives

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Sofia Regnell Andersson; KTH.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Polylactide; stereocomplex; plasticizer; degradation; degradation products; ESI-MS;

    Abstract : The successful use of degradable materials in new applications depends on our ability to control the degradation process. A number of aspects need to be evaluated including degradation rate, the onset of degradation and the nature, formation and release of degradation products. READ MORE

  4. 4. LDI-MS strategies for analysis of polymer degradation products, additives and drugs

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Nina Aminlashgari; KTH.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; laser desorption ionization-mass spectrometry LDI-MS ; surface; polymer degradation products; additive; drugs; nanoparticles; nanocomposites; Kemi; Chemistry;

    Abstract : The advancement of mass spectrometry (MS) has been and continues to be a prominent analytical technique for highly accurate determination of analytes. The goal of this thesis was to develop new laser desorption ionization-mass spectrometric (LDI-MS) methods for analysis of polymer degradation products, additives and drugs. READ MORE

  5. 5. Lignocellulose Degradation by Soil Micro-organisms

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Ran Bi; KTH.; KTH.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Lignocellulosic biomass is a sustainable resource with abundant reserves. Compared to petroleum ‐ based products, the biomass ‐ derived polymers and chemicals give better environmental profiles. A lot of research interest is focused on understanding the lignocellulose structures. READ MORE