Sökning: "degree of crystallinity"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden degree of crystallinity.

  1. 1. Tuning physical and chemical attributes of the synthetic implant poly(L-lactic acid) and its effects on biological stimulation

    Kandidat-uppsats,

    Författare :Gabriella Sverlinger; Felicia Norman; Nora Othman; Wilma Hämäläinen; Michaela Thyberg; Maja Jonsson; [2023]
    Nyckelord :Polylactic acid; degradation rate of PLLA; physio- chemical properties of PLA; injectable PLLA;

    Sammanfattning : Poly(lactic acid) (PLA) is a polymer chain consisting of repeating units of lactic acid (LA) used in various biomedical applications because of its biocompatible features. It is commonly used as a subdermal filler and constitutes as the main ingredient in SculptraR, which is a collagen regenerating filler used to treat lipoatrophy of the cheeks or to rejuvenate the skin. LÄS MER

  3. 2. Fibre volume fractions’ and printing directions’ effects on tribological and mechanical properties in FDM printed carbon fibre reinforced PEEK : Suitability assessment of FDM printed PEEK-CF to act in a steam engine’s ball joint, by analysis of compressive properties, impact strength, friction and wear

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

    Författare :William Tönnberg; [2022]
    Nyckelord :Ranotor; steam engine; PEEK; polyether-ether-ketone; carbon fibre reinforced PEEK; impact strength; compressive strength; compressive modulus; friction; wear; tribology; FFF; FDM; 3D-printing; printing parameters;

    Sammanfattning : The purpose with this study was to investigate FDM/FFF manufactured carbon fibre reinforced PEEK and assess its suitability to act as a sealing- and bearing material in a modern steam engine’s ball joint. The steam engine is totally free from oil due to the risk of water- and steam contamination. LÄS MER

  4. 3. Design of telechelic oligo-(caprolactone-co-dioxanone) as photocurable macromonomers for degradable gels

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Tran Tam Nguyen; [2020]
    Nyckelord :macromonomers; ring-opening co-oligomerization; telechelic co-oligomers; polymer; organocatalyst; makromonomerer; ringöppning samoligomerisering; telekelisk samoligomer; organisk katalysator;

    Sammanfattning : Three-dimensional (3D) printing has an important role for fabrication of degradable scaffoldsfor soft tissue regeneration. Among the 3D printing techniques, photopolymerization-based 3Dprinting is one of fastest growing, offering environmental benefits and high precision of 3Dobjects. LÄS MER

  5. 4. Friction and Wear Performance of Experimentally Developed Self-lubricating PPS/PTFE Composites

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Kimberly Rose Lagrama; [2019]
    Nyckelord :PPS; PTFE; self-lubricating composites;

    Sammanfattning : Demanding applications, as well as the push to eliminate the need for fossil-fuel based lubricants, create the need for the development of high-performance polymers. Polyphenylene Sulfide (PPS) is an example of a high-performance polymer and has a high service temperature, good dimensional stability, and excellent chemical resistance. LÄS MER

  7. 5. Mechanical and Thermal Characterisation of Novel UHMWPE Composites for Total Joint Arthroplasty

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Julian Somberg; [2019]
    Nyckelord :UHMWPE; Nanocomposites; DSC; Fracture Toughness; Wear;

    Sammanfattning : Total joint arthroplasty surgeries are known to have a high success rate but the longevity of the implants still acts as a limiting factor. Ultrahigh molecular weight polyethylene is the material of choice for the implant bearing surfaces due to its excellent clinical and tribological performance. LÄS MER