Sökning: "oligomer"

Visar resultat 1 - 5 av 10 uppsatser innehållade ordet oligomer.

  1. 1. Investigation of acidic chemical recycling of poly(acetal-ester)s

    Magister-uppsats, Lunds universitet/Centrum för analys och syntes

    Författare :Saga Vesterbacka; [2023]
    Nyckelord :Poly actetal-ester s; Chemical plastic recycling; Hydrolysis; Acidic degradation; Akestra; PHVT; Re-polymerization; Polymer technology; Chemistry;

    Sammanfattning : Plastic recycling is a very relevant topic from both environmental and economic viewpoints. Chemical plastic recycling is a logical solution to the plastic problems, which shows the potential to reduce plastic waste and carbon emissions from burning the plastics. LÄS MER

  3. 2. Photophysics of the polymer acceptor PF5-Y5 in organic photovoltaics : A first principles theory based study

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Anton Almén; [2022]
    Nyckelord :PF5-Y5; Non-fullerene-acceptor; NFA; polymer; fundamental; optical; gap; oxidation; reduction; exciton; binding; energy; oligomer; length; PF5-Y5; Non-fullerene-acceptor; NFA; polymer; fundamentalt; optiskt; gap; oxidation; reduktion; exciton; binding; energi; oligomerlängd;

    Sammanfattning : Non-fullerene Acceptors (NFAs) have gathered a great deal of interest for use inorganic photovoltaics (OPVs) due to recent breakthroughs in their power conversion efficiency and other advantages they offer over their Fullerene-based counterparts. In this work, a new promising non-fullerene polymer acceptor, PF5-Y5, have been studied using density functional theory and time-dependent density functional theory; and the effects that oligomer length, geometry relaxation and exchange-correlation interaction has on the exciton binding energies (the difference between optical and fundamental energy gaps) have been investigated. LÄS MER

  4. 3. Assessing the effectiveness of siloxane-based flame retardants

    Master-uppsats, KTH/Kemiteknik

    Författare :Josefin Eklund Wallin; [2022]
    Nyckelord :Polyhderal oligomeric silsesquioxane; POSS; PVC; TGA DSC; DSC; thermal properties;

    Sammanfattning : Polyedrisk oligomer silsesquioxane (POSS) är molekyler som har en inorganisk ryggrad med organiska grupper fa ̈sta utan på. Själva kåren har en bur liknande form och har en hög termisk stabilitet tack vare kisel (Si) och syre (O) som den består av. LÄS MER

  5. 4. Study of hole mobility in amorphous polyethylene via kinetic Monte Carlo methods

    Master-uppsats, KTH/Matematik (Avd.)

    Författare :Hannes Aspåker; [2022]
    Nyckelord :;

    Sammanfattning : This thesis presents a study of hole mobility in amorphous polyethylene using kinetic Monte Carlo (KMC) methods together with a novel chain segmentation model developed by Unge and Nilsson, which determines hole localization sites based on torsion angles along the polymer chain. An extension to the KMC algorithm was developed which improves performance by modelinground-trips between strongly interconnected localization sites. LÄS MER

  7. 5. Kombinationsmolekyler för genterapi : Konjugat mellan peptider och oligonukleotider

    Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Amanda Gustafsson; Vincent Goijenfalk; Frida Kasselstrand; Vendela Werner; Astrid Ulveström; Astrid Ekman; [2021]
    Nyckelord :;

    Sammanfattning : The report examines how the market, as well as purification conditions, forpeptide-oligonucleotide conjugates look like today. These conjugates are intended to be usedin drugs to treat otherwise incurable diseases but so far these types of molecules are still intest-phases and no finished conjugate is on the market yet. LÄS MER