Search for dissertations about: "polymer"

Showing result 1 - 5 of 1472 swedish dissertations containing the word polymer.

2. 1. Synthesis and Modification of Conjugated Materials for Polymer Solar Cells

   Author : Zandra George; [2016]
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; polymer interlayer; polymer solar cells; stability; conjugated polymers; fullerene derivatives;

   Abstract : Polymer solar cells have emerged as a promising alternative to silicon based solar cells. One of the advantages of polymer solar cells is the possibility to use roll-to-roll techniques for large-scale device production. However, in order to fully utilize this technique, several issues need to be resolved. READ MORE

4. 2. Polymer/polymer blends in organic photovoltaic and photodiode devices

   University dissertation from Linköping : Linköping University Electronic Press

   Author : Yuxin Xia; Olle Inganäs; Ergang Wang; Hin-Lap Yip; [2018]
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Organic photovoltaics devices (OPV) have attracted attentions of scientist for their potential as inexpensive, lightweight, flexible and suitable for roll-to-roll production. In recent years, considerable attention has been focused on new acceptor materials, either polymeric or small molecules, to replace the once dominating fullerene derivatives. READ MORE

5. 3. Mass Transport Through Polymer Films: The Importance of Interfaces and Compatibility

   University dissertation from Linköping : Linköping University Electronic Press

   Author : Sofie Gårdebjer; [2016]
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Surface modification; Interfaces; Compatibility; Polymer films; Cellulose; Barriers;

   Abstract : Different types of barriers are used in packaging to keep and protect products from the surrounding environment and are often essential for storing and transportation. Today, many barriers are made of different types of polymers, but since most polymers do not exhibit desired barrier properties on their own, combinations must be used. READ MORE

6. 4. Synthesis of AcGGM Polysaccharide Hydrogels

   University dissertation from Stockholm : KTH Royal Institute of Technology

   Author : Laleh Maleki; Ulrica Edlund; Anette Larsson; [2016]
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; hemicellulose; O-acetyl-galactoglucomannan; wood hydrolysate; hydrogel; radical polymerization; interpenetrating polymer network; click chemistry; thiol-ene; Michael addition; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Abstract : Lignocellulosic biomass is believed to serve a prominent role in tomorrow’s sustainable energy and material development. Among the polysaccharide fractions of lignocellulosic biomass, the potential of hemicelluloses as a valuable material resource is increasingly recognized. READ MORE

7. 5. Crystallization in Constrained Polymer Structures Approaching the Unsolved Problems in Polymer Crystallization

   University dissertation from Stockholm : KTH

   Author : Eugenia Núñez; Ulf W. Gedde; Bernard Lotz; [2006]
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Crystallization; Constrained structures; poly ε–caprolactone ; poly ethylene oxybenzoate .; NATURAL SCIENCES Chemistry Organic chemistry Polymer chemistry; NATURVETENSKAP Kemi Organisk kemi Polymerkemi;

   Abstract : The knowledge regarding certain issues in polymer crystallization e.g. the possible existence of short–lived mesophases remains inconclusive due to experimental limitations. Polymers undergo chain folding upon crystallization, which introduces some complications that are not found in crystallization of low molar mass materials. READ MORE