Search for dissertations about: "polypropylene"

Showing result 1 - 5 of 78 swedish dissertations containing the word polypropylene.

  1. 1. Polypropylene Morphology, defects and electrical breakdown

    University dissertation from Stockholm : KTH

    Author : Sari J. Laihonen; KTH.; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical engineering; polypropylene; poly propylene-stat-ethylene ; crystal structure; morphology; crystallinity; crystallization kinetics; lamellae; spherulite; defect; Kemiteknik; TECHNOLOGY Chemical engineering; TEKNIKVETENSKAP Kemiteknik;

    Abstract : 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. READ MORE

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

    University dissertation from Stockholm : Fiber- och polymerteknologi

    Author : Petter Eriksson; KTH.; [2002]
    Keywords : oxidation; polypropylene; oxidative spreading; antioxidants; hyperbranched antioxidants;

    Abstract : 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. READ MORE

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

    University dissertation from Institutionen för polymerteknologi

    Author : Petter Eriksson; KTH.; [2001]
    Keywords : Oxidation; Spreading; Chemiluminescence; Imaging; Polypropylene; PP; Polyamide; Gasphase;

    Abstract : .... READ MORE

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

    University dissertation from Gunilla Cederholm, Chemical Engineering II, Chemical Center, P.O. Box 124, S-221 00 LUND, Sweden

    Author : Bertil Ohlsson; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Reactive Processing; Compatibilization; Thermal Properties; Mechanical Properties; Morphology; SEBS; Polyamide; Polymer Blends; Polypropylene; Polymer technology; biopolymers; Polymerteknik;

    Abstract : 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. READ MORE

  5. 5. First-principles calculations of polymer interactions

    University dissertation from Gunilla Cederholm, Chemical Engineering II, Chemical Center, P.O. Box 124, S-221 00 LUND, Sweden

    Author : Jesper Kleis; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; polymer structure; polyvinylchloride.; polypropylene; polyethylene; sparse material systems; Density functional theory; polymer interactions; van der Waals interaction; polymer crystal; soft matter; DFT;

    Abstract : This thesis reports on studies of interactions in sparse matter by first-principles calculations, in particular polymeric systems. The focus is on the three unbranched simple polymers: polyethylene (PE), isotactic polypropylene (PP) and isotactic polyvinylchloride (PVC), which together represent an important class of materials that form complexes stabilized by weak but long-range dispersive interactions. READ MORE