Dissertation > Excellent graduate degree dissertation topics show

Study on the Degradation of Unsaturated Polyester Resin and Fiber Reinforced Polymer in Hot Compressed Water

Author: ChenZhongWu
Tutor: MengLingHui
School: Harbin Institute of Technology
Course: Polymer Chemistry and Physics
Keywords: HCW Degradation UPR FRP Reaction kinetics
CLC: TQ320.1
Type: Master's thesis
Year: 2008
Downloads: 142
Quote: 0
Read: Download Dissertation


Fiber reinforced plastics (FRP) are used extensively in high pressure pipelines or vessels and vehicles such as watercrafts and automobiles. However, the high output of FRP to meet the rising market demands has produced a great amount of UPR wastes, which would bring serious burden to the environment. Unsaturated polyester resins (UPR) are the thermoset resins of greatest consumption in production of FRP. Therefore, it is necessary to propose a recovery processing to dispose the FRP wastes and obtain the renewable resources.In this article, the degradation of UPR and FRP in hot compressed water (HCW) is discussed. This article comprises three parts: degradation in HCW, characteration of reaction products and analyse of reaction kinetics. The apparent degree of degradation and factual degree of degradation were the main parameters to assess degradation efficiency. Frontier Transform Infrared Spectroscopy (FTIR), Thermogravimetry (TG), Gas Chromatography-Mass Spectrum (GC-MS), Liquid Chromatography- Mass Spectrum (LC-MS) and High Performance Liquid Chromatography (HPLC) were employed to analyze water products and solid products. The kinetic models in literatures were employed in this article to describe the degradation rate of UPR in HCW.The reaction time and the reaction temperature had positive influence to the degradation of UPR and FRP in HCW. In the experiments of UPR decomposed in HCW, the optimum water volume is 30ml. While in the experiments of FRP decomposed in HCW, the optimum water volume is 40ml. When the FRP decomposed in HCW at 350℃, 40ml H2O for 60min, the apparent degree of degradation was 74.32% and the factual degree of degradation was 90.82%; the surface of recycled glass fiber was relatively pure, and the resin content that remains on the surface of recycled glass fiber was only 6.52%. The alkali NaOH was significant in enhancing the degradation of UPR and FRP in HCW, but at the same time it can damage the glass fiber to some extent.When the reaction temperature was lower than 280℃, the network structure of crosslinked unsaturated polyester resin did not have much distinct destruction with exception of broken ester bond of phthalate. Phthalic acid and acetic acid were found in water phase. When the reaction temperature was between 280℃and 310℃, the chemical bonds of succinic acid ester were broken and cyclized to anhydride. Phthalic acid and 2,3-bis(2-phenylpropyl) succinic acid were found in water phase. When the reaction temperature was between 310℃and 350℃, benzoic acid was found in water phase. When the temperature was higher than 350℃, the crosslinked network structure of crosslinked unsaturated polyester resin was completely destroyed. The solid products could dissolve in the ethyl acetate and water phase products were mainly benzoic acid.By studying the degradation of UPR in HCW between 280~310℃, the rate constants were 0.00932s-1, 0.01249s-1, 0.01549s-1 and 0.01720s-1, respectively. And the apparent activation energy of degradation reaction was worked out through Arrhenius equation. In the experiments, the value of activation energy was 55.21kJ/mol.

Related Dissertations

  1. Process Optimization and Degradation Kinetics for Microwave Vacuum Drying of Different Traditional Chinese Medicine Extract,TQ461
  2. Study on the Preparation of the Low Molecular Weight Fuciodan from Sargassum Henslowianum (C.Agardh) and Anti-tumor Activity,TS254.9
  3. Study on Activated Carbon Supported Cerium Catalytic Ozone Oxidation of Chloramphenicol,X703
  4. The Study of Preparation and Photocatalytic Activity of TiO2 by Electrospinning,O614.411
  5. Process and Mechanism of Eucalyptus Pulp Bleaching Catalysed by Cu2+/Co2+,TS745
  6. The Research on Sulfate Leaching Properties of Cation-exchange Resin Used in Power Plants,TQ425.23
  7. Study on the Breeding of High Efficient Detoxification Strains and Suggestion Parameters of Solid Fermentation on Cottonseed Meal,S816.6
  8. Detection of Exogenous Recombinan DNA of Transgenic Rice and Its Rice Product,S511
  9. Study on Detection of Transgenic Ingredients in Genetically Modified Cottonseed Meal and Its Degradation during Feed Processing,S816
  10. Isolation, Identification and Degradation Characteristics of a Benazolin-Ethyl Degrading Bacteria and Degradation Pathway,X172
  11. Isolation and Identification of Pyrene-Degrading Strain SE12 and Its Degrading Effect,X172
  12. The Interaction of Fluroxypyr with the Green Alga Chlamydonomas Reinhardtii,S482.4
  13. Isolation, Identification and Degrading Characteristic of a Cyhalofop-Butyl-Degrading Bacteria, and Cloning, Expression of a Cyhalofop-Butyl-Hydrolyzing Gene chbH,X172
  14. A Study on Environmental Behaviors of 2,4-D Butylate,TQ450.2
  15. Study on Oxidation Treatment of Phenol Contaminted Soil Using Potassium Ferrate,X53
  16. Study on the Three-stage Inoculant and Lignocellulose Gegradation in Dairy Manure Composting,S141.4
  17. Effects of Nitrogen Management Practices on Expression and Degradation of Bt-protein in Transgenic Cotton,S562
  18. Study on Mixed Strain for Liquid State Fermentation of Animal Blood,S816.4
  19. The Discovery and Biological Activity Study of ER Stress Modulator,R96
  20. Monitoring of Degaradation of CP4-EPSPS Protein, Endogenous and Exogenous Gene in Roundup Ready Soybean during Food Processing,S565.1

CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > General issues > Basic theory
© 2012 www.DissertationTopic.Net  Mobile