Dissertation > Excellent graduate degree dissertation topics show

Study on New Toughening Flame Retardant Polycarbonate

Author: DengTianMing
Tutor: QiuYiPing
School: Donghua University
Course: Textile Material and Textiles Design
Keywords: polycarbonate toughening flame retardant (POE/PP/MBS) -g-MAH acrylate-grated-siloxane
CLC: TQ323.41
Type: Master's thesis
Year: 2010
Downloads: 119
Quote: 0
Read: Download Dissertation

Abstract


Because of excellent mechanical properties, flame-retardent and good processability, polycarbonate gets a wide range of application. However, some properties of PC still can’t reach the requirment of practical application, such as low impact-resistent, low efficiency of flame retardants etc.. In order to improve impact-resistent and achieve flame-resistant purpose, PC were modified by adding new toughening reagents and green flame retardants. And several kinds of modificated PC with excellent properties were made.Firstly, two kinds of toughening reagents POE-g-MAH and(POE/PP/MBS)-g-MAH) with similar liquidity and MAH grafted rate were made. PC and toughening reagents were directly blended and the effects of different contents of toughening reagents on mechanical properties were investigated. Research shows:as increasing of toughening reagents, PC’s tensile strength, bending strength and bending modulus is decreased, but tensile elongation is increased. Compared with the toughening effect of POE-g-MAH, (POE/PP/MBS)-g-MAH’s is better. It is because MMA in MBS increases compatibility of the PC alloy. And 5% to 10% of (POE/PP/MBS)-g-MAH is suggested.Secondly, oxygen index number method and perpendicular burnable method were used to investigate the influence of several kinds of flame retardants on flame-resistant properties of PC. Research shows:adding contents of aluminum hydroxide and magnesium hydroxide are huge, and physical and mechanical properties of the modified PC are deteriorated; flame retardent of PC is increased from UL94-V2 to UL94-V0 by adding 6 parts of FR-Br, and strength of PC is increased too; flame retardent of PC is increased from UL94-V2 to UL94-V1 by adding 6 parts of FR-Si, and has few influence on system properties.Finally, the influence of the main compositions in the system and other conditions on the mechanics property of the composites was investigated:silicone oil can improve the flame retardant effects of FR-Si, but also can greatly reduce the tensile elongation at break; FR-Si modified PC is sensitive to temperature, there are lots of cavities in the fracture surface of the PC if the processing temperature is too high.

Related Dissertations

  1. Situ synthesis of mullite stone whisker toughening microwave metallurgical corundum - mullite Refractories,TQ175.6
  2. Synthesis of Polysulfones and Modification for Epoxy Adhesives,TQ433.437
  3. Synthesis and Application of halogen-free pairs of the phosphate ester flame retardants,TQ314.248
  4. The Degradation of PET to Synthesize Phosphate Flame Retardants and the Study of Their Flame-retardant Performance,TQ314.248
  5. Synthesis and Application of New Halogen-free Flame Retardant Cotton with Expandable Anti-wrinkle Agent PNX,TQ314.248
  6. The Research of Synthesis of Bisphenol-A Polycarbonate Through Melt Transesterification Process,TQ323.41
  7. Synthesis and Application of multi - ring phosphine (phosphorus) ester flame retardants,TQ314.248
  8. Study on the Green Synthesis of Polycarbonate Urethane,TQ323.8
  9. Formation and Performance of B4C/Al Anti-damage Composite,TB333
  10. 3-D Finite Element Analysis of Embedded Delamination Growth in Composite Panels,TB33
  11. Study on the Preparation of Microencapsulated Red Phosphorus Contained Intumescent Flame Rtardant and Flame Retarding and Smoke-suppressing Mechanism of IFR Flameretarded Epoxy Resin,TQ323.5
  12. Reinforcing and Flame-retardant Effects of Mesoporous Molecular Sieve on Polydicyclopentadiene,O632
  13. Flame Retardant Treatment of FET Fabric,TS195.5
  14. Formation and Performance of B4C/Al Anti-damage Composite,TB333
  15. Nano- double hydroxides Preparation and application performance in PVC,TQ325.3
  16. Study on the Morphology, Mechanical and Processing Properties of PP Nanocomposites,TB332
  17. Study on the Ceramic Flame Retardant Poplar Plywood,TS653.3
  18. Preparation, Drying and Application of Micro-encapsulated Tetrabromobisphenol a Bis(2, 3-dibromopropyl Ether),TQ314.248
  19. Preparation and Properties of Intumescent Flame Retardant Styrene-butadiene Rubber and EPDM/Polypropylene Composites,TQ330.1
  20. Synthesis of a Flame Retardant SPCA and Application for PP,TQ325.14

CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > Polycondensation resin and plastic > Polyester resins and plastic materials > Unsaturated polyester
© 2012 www.DissertationTopic.Net  Mobile