Search for dissertations about: "polylactide"

Showing result 1 - 5 of 14 swedish dissertations containing the word polylactide.

  1. 1. Agro-Waste Derived Additives for Polylactide and Tapioca Starch

    Author : Edwin Azwar; Minna Hakkarainen; Anna Wistrand; Christian Glandfils; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Agro-industrial waste; wood flour; rice bran; polylactide; starch; biomass; degradation; SRA - E-Science SeRC ; SRA - E-vetenskap SeRC ;

    Abstract : Development of materials from renewable resources is one of the big challenges facing our world. In this thesis agro-industrial waste derivatives were developed and evaluated as additives for two common renewable polymer matrices, polylactide (PLA) and starch. Two waste products, wood flour (WF) and rice bran (RB) were evaluated in different forms. READ MORE

  2. 2. Tuning the polylactide hydrolysis rate without introducing new migrants

    University dissertation from Stockholm : KTH Royal Institute ot Technology

    Author : Sofia Regnell Andersson; Minna Hakkarainen; Karin Jacobson; Ulrika Edlund; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; polylactide; sterocomplex; plasticizer; degradation; degradation products; ESI-MS; NATURAL SCIENCES Chemistry Biochemistry; NATURVETENSKAP Kemi Biokemi; NATURAL SCIENCES Chemistry Organic chemistry Polymer chemistry; NATURVETENSKAP Kemi Organisk kemi Polymerkemi;

    Abstract : The possibility to control and tune the hydrolytic degradation rate of polylactide without introducing any new degradation products was investigated by subjecting polylactide with cyclic or linear oligolactic acid additives, and a stereocomplex between the L- and D-enantiomers of polylactide to hydrolytic degradation at 37 and 60 °C for up to 39 weeks. The degradation was monitored by measuring mass loss, molar mass changes, water uptake, changes of surface structure, crystallinity and thermal properties. 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; Minna Hakkarainen; Ann-Christine Albertsson; Marek Kowalczuk; [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. Towards a retro-structural design of degradable aliphatic polyester-based materials

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Veluska Arias; Ann-Christine Albertsson; Minna Kellomäki; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Hydrolysis; polyesters; polylactide; hydrophobicity; crystallinity; miscibility; nanoparticles; stereocomplex; homocomposites; Kemi; Chemistry;

    Abstract : The increasing amount of accumulated plastic waste has led to a continuous search for degradable materials for use in a variety of applications. This eco-friendly approach contemplates the use of degradable alternatives to the inert polymers (the main components in plastics) used today and further engineering of their degradation pathways. READ MORE

  5. 5. From Fast to Slow Degradation Different Strategies to Characterise Polymer Degradation by Chromatographic Techniques

    University dissertation from Institutionen för polymerteknologi

    Author : Guillaume Gallet; [2001]
    Keywords : poloxamer; polylactide; degradation; oxidation. Hydrolysis. Solid phase microextraction;

    Abstract : .... READ MORE