Sökning: "polypropylene"

Visar resultat 1 - 5 av 109 avhandlingar innehållade ordet polypropylene.

  1. 1. Polypropylene : Morphology, defects and electrical breakdown

    Författare :Sari J. Laihonen; Ulf W. Gedde; Erling Ildsten; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical engineering; polypropylene; poly propylene-stat-ethylene ; crystal structure; morphology; crystallinity; crystallization kinetics; lamellae; spherulite; defect; Kemiteknik; Chemical engineering; Kemiteknik;

    Sammanfattning : Crystal structure, morphology and crystallization kinetics of melt-crystallized polypropylene and poly(propylene-stat-ethylene) fractions with 2.7 to 11.0 mol% of ethylene were studied by differential scanning calorimeter, wide- and small-angle X-ray scattering, polarized light microscopy, transmission electron microscopy and infrared spectroscopy. LÄS MER

  2. 2. Plasma Modification of Polypropylene Materials for Improved Adhesion

    Författare :Anna Nihlstrand; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polypropylene; characterization; material composition; lacquer adhesion; plasma modification; chain scission; vacuum-ultraviolet radiation; thermoplastic polyolefin;

    Sammanfattning : Materials based on PP are widely used in industrial applications. To fulfil application demands, components must often be lacquered, printed or glued. As PP is highly unreactive and presents a low surface energy, a pretreatment that can promote bondability is necessary. LÄS MER

  3. 3. New Approaches to Investigate and Prevent Oxidation of Polypropylene

    Författare :Petter Eriksson; KTH; []
    Nyckelord :oxidation; polypropylene; oxidative spreading; antioxidants; hyperbranched antioxidants;

    Sammanfattning : When employing chemiluminescence to evaluate stabiliserperformance in a polymer, the induction time or the time toreach maximum chemiluminescence intensity is often used. Insuch an experiment the longest part of the experiment isnormally the time before the oxidation starts. LÄS MER

  4. 4. Oxidative spreading in polypropylene as studied by iImaging chemiluminescence

    Författare :Petter Eriksson; KTH; []
    Nyckelord :Oxidation; Spreading; Chemiluminescence; Imaging; Polypropylene; PP; Polyamide; Gasphase;

    Sammanfattning : .... LÄS MER

  5. 5. Morphology and Properties of Polymer Blends -Polypropylene and a Thermoplastic Elastomer -Polypropylene/Polyamide (1/1) and a Modified Thermoplastic Elastomer

    Författare :Bertil Ohlsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Reactive Processing; Compatibilization; Thermal Properties; Mechanical Properties; Morphology; SEBS; Polyamide; Polymer Blends; Polypropylene; Polymer technology; biopolymers; Polymerteknik;

    Sammanfattning : The search for polymeric materials with new property profiles has stimulated a great interest into polymer blends and reactive processing. During recent years many new blends have reached the market. LÄS MER