Search for dissertations about: "Dehydrochlorination"

Showing result 1 - 5 of 8 swedish dissertations containing the word Dehydrochlorination.

2. 1. Recycling and durability of PVC materials focusing on pre- and post-consumer wastes from building products

   Author : Nazdaneh Yarahmadi; SP – Sveriges Tekniska Forskningsinstitut *(2016-12-31) SP – Sveriges Tekniska Forskningsinstitut; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Accelerated ageing; Activation energy; Annealing; Cables; Dehydrochlorination; Dismantling; DSC; Elongation at break; Emissions; Energy recovery; Flooring; Heat ageing; Lifetime; Orientation; Physical ageing; Plasticised PVC; Plasticiser depletion; Profiles; Recycling; Repeated extrusion; Residual stability; Rigid PVC; Sustainable building; Chlorination; Degradation; Durability; Mechanical properties; Plastic building materials; Plasticizers; Stabilizers agents ; Tensile properties; Molecular level; Polyvinyl chlorides;

   Abstract : The potential for recycling various polymeric materials contained within buildings constructed in the late 1960s and 1970s in Sweden was investigated during the course of this work. Three residential blocks were studied to establish the quantity of materials available for recycling, to investigate the difficulty in and time needed for the dismantling of the buildings, the degree of purity of the materials, and the possibility of separating the materials. READ MORE

4. 2. An Environmental Approach to PVC Stabilisation

   Author : Paul Clucas; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; organic stabiliser; base catalysed dehydrochlorination; colour improvement ; dehydrochlorination stability; polymer-bound stabiliser; intrasequence lactonisation; co-stabiliser; PVC stabilisation; colour stability; labile chlorine substitution; neighbouring group participation;

   Abstract : We were interested in investigating the stabilisation behaviour of 6-aminouracils, a new class of heavy metal free thermo-stabiliser for PVC. We have therefore investigated the performance and mechanism of stabilisation for 1,3-dibutyl-6-aminouracil, both alone, and in combination with a sodium perchlorate co-stabiliser. READ MORE

5. 3. Microstructure and Thermal Degradation of PVC with Improved Thermal Stability

   Author : Mikael Rogestedt; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Although the low thermal stability of poly(vinyl chloride) (PVC) has been an area of intensive research, the relation between microstructure and degradation behaviour is still not fully understood. This thesis deals with the structure, thermal degradation and modification of ordinary PVC. READ MORE

6. 4. Plasticized PVC Nanocomposites - The Effect of Montmorillonite Treatment and Processing Conditions on Material Properties

   Author : Henrik Petersen; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; melt processing; Montmorillonite; mechanical properties; scanning electron microscopy; X-ray diffraction; poly vinyl chloride ; organic modification; barrier properties;

   Abstract : ABSTRACTPolyvinyl chloride (PVC) is one of the world’s most widely produced polymers. Its products are used in a wide range of areas such as building and construction, packaging, automotive, electrical/electronic and healthcare. PVC can easily be tailored to adapt material properties to specific applications. READ MORE

7. 5. Long-term performance of poly(vinyl chloride) cables : mechanical and electrical performances and the effect of plasticizer migration

   Author : Maria Ekelund; Ulf W. Gedde; Minna Hakkarainen; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Poly vinyl chloride cables; ageing; mechanical properties; plasticizer migration; Polymer chemistry; Polymerkemi;

   Abstract : Cables insulated with plasticized poly(vinyl chloride) were aged at temperatures between 80 and 180 °C in air and their conditions were assessed by indenter modulus measurements, tensile testing, infrared (IR) spectroscopy, differential scanning calorimetry (DSC) and liquid chromatography (HPLC). Electrical testing of oven-aged cable samples was performed in order to relate the electrical functionality during a high-energy line break accident to the mechanical properties and to establish a lifetime criterion. READ MORE