Essays about: "ring opening"

Showing result 1 - 5 of 19 essays containing the words ring opening.

  1. 1. Synthesis and characterization of lactic acid-based elastomers

    University essay from Högskolan i Borås/Akademin för textil, teknik och ekonomi

    Author : Afsaneh Makhdoumi; [2023]
    Keywords : Lactic acid; Elastomer; Bio-based elastomer; Renewable resource;

    Abstract : Synthesized polymer from bio-based and renewable resources reported as an attractive substitution for fossil-fuel based polymers. Therefore, this work has focused on using sustainable material for production of elastomers to reduce the environmental impact of fossil-based elastomers and overcome the shortage of non-renewable fuels. READ MORE

  3. 2. Sustainable Polymer Production: Investigating Synthesis and Copolymerization of Cyclic Ketene Acetals

    University essay from KTH/Kemiteknik

    Author : Soufian Bourraman; Stella Staffas; Adam Brandt; Simon Isaksson; [2023]
    Keywords : Monomers; polymers; radical; radical ring opening polymerization; polymerization; BMDO; MMA; MVL; MBL; comonomer; copolymer; rROP; sustainable; biobased; degradable; monomer synthesis; plastic; polyester; bulk; solution; NMR; FTIR; TGA; DSC; SEC; hydrolysis; molecular weight; diol; ester bonds;

    Abstract : The large amount of non-degradable plastic waste has become a significant environmental concern, leading to an increased need for degradable plastics. Here in, to create degradable polymers, polyesters were produced through radical ring opening polymerization using cyclic ketene acetals. READ MORE

  4. 3. ROP in novel biobased ionic liquids towards cellulose functionalization

    University essay from KTH/Fiber- och polymerteknologi

    Author : Rebecca Mattsson; [2023]
    Keywords : Ionic liquids; SI-ROP; coROP; polyesters; cellulose; Jonvätska; yt-initierad Ringöppnings-polymerisation; ringöppnings-sampolymerisation; polyestrar; cellulosa;

    Abstract : Ett nytt sätt att aktivera cellulosa för kemisk modifiering med hjälp av en miljövänlig process har utvecklats innan starten av detta projekt. Två versionen av den nyskapade betain-baserade jonvätskan, BBIL har syntetiserats, en som använder mesylat som motjon, M-BBIL och en som använder acetat, A-BBIL. READ MORE

  5. 4. Development of a new simmer ring : A collaboration between KTH and Trangia AB

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Oliver Holmquist; Erica Alfredsson; [2022]
    Keywords : ;

    Abstract : Det här kandidatarbetet har som syfte att ta fram en ny lösning åt Trangia för att reglera värmen i deras spritbrännare. Ett antal problem skulle lösas. Bland annat ska användaren inte ska kunna bränna sig, lösningen ska vara liten och lätt, samt optimeras för tillverkning. READ MORE

  6. 5. Modulation of a model ligand-gated ion channel by amphetamine derivatives

    University essay from Uppsala universitet/Strukturbiologi

    Author : Emelia Karlsson; [2022]
    Keywords : pentameric ligand-gated ion channels; sTeLIC; electrophysiology; psychostimulants; amphetamine derivatives;

    Abstract : Pentameric ligand-gated ion channels are critical mediators of electrochemical signal transduction in neurons and other excitable cells, causing them to be important targets of psychoactive drugs. Structural data for these complex proteins are limited, particularly among eukaryotic family members and for the functionally critical open state. READ MORE