Dissertation > Excellent graduate degree dissertation topics show

Study on the Preparation, Morpholoy and Properties of PA6/sepiolite Composeties

Author: YuHaiMei
Tutor: DaiWenLi
School: Xiangtan University
Course: Polymer Chemistry and Physics
Keywords: PA6 Sepiolite Composites Absorbency Crystallization Behavior
CLC: TB332
Type: Master's thesis
Year: 2010
Downloads: 73
Quote: 0
Read: Download Dissertation

Abstract


Sepiolite unique pore structure and large specific surface area and good adsorption properties, mechanical properties and structure stability. Sepiolite by acid activation with a polyamide 6 (PA6) blend, the PA6 resin aggregation morphology changes, changes in performance. The purpose of the pilot study is sepiolite strong adsorption and special mechanical properties and structure stability, hoping to achieve reduce water absorption of PA6 can improve the mechanical properties of the composite material, also investigated the crystallization behavior and thermal properties of the composites . Sepiolite and PA6 in the sepiolite acid activation treatment, to study the changes in morphology; With a twin-screw extruder and an injection molding machine, after the acid activation of the composite material was prepared by melt-blending, by scanning electron microscopy (SEM ) and sepiolite composite dispersed situation; test the mechanical properties of the composite material, study sepiolite on the mechanical properties of the composites. Sepiolite filling amount of the water absorption of the composite material was measured, and the measured composite material in different ambient temperatures, the changes of the water absorption in the different media, analysis of the diffusion process of the water molecules in the inside of the composite material, determination of the diffusion coefficient of water in study the impact of moisture on the mechanical properties of the composites. By differential scanning calorimetry analysis (DSC), wide-angle X-ray diffraction (WAXD), polarized light microscopy (PLM) and other means to study the crystallization behavior of composite materials under different conditions, and to examine the impact of sepiolite PA6 crystalline properties. Test the composites Vicat softening point temperature and the melting point (Tm), thermal gravimetric analysis (TGA). Study the thermal decomposition of the composite were investigated sepiolite composite heat resistance. Sepiolite after acid activation, sepiolite fibers get a better lysis; sepiolite is dispersed uniformly in the composite material; sepiolite better enhancement of PA6 resin, compared with the pure PA6, composite materials the tensile strength, flexural strength of 81.5 MPa, 112.0 MPa, increased by 13.5% and 26.1%, the Young's modulus and the elastic modulus increased to 775.7 MPa and 1952.4 MPa, 15.7% and 39.6% respectively. Sepiolite improved the PA6 / sepiolite composite absorbent saturated water absorption from pure PA6 11.0% down to 8.3%; ambient temperature increased greatly affected the initial moisture absorption and moisture absorption rate of the composite, reducing saturated water absorption; different media affect the adsorption process of the composite; show that the study of the mechanical properties of material after absorbing water: sepiolite relative increase retention of the material mechanical properties. WAXD and DSC results show: sepiolite so the PA6 / sepiolite composite crystallinity lower crystallization temperature, and played the role of heterogeneous nucleation agent; sepiolite change both α and γ in the composite the relative content of the polymorph; PLM observation showed that: sepiolite particles PA6 crystal morphology changed. Sepiolite fiber is added, the melting point of the composite material, melting enthalpy have a slight decrease; Vicat softening point temperature performance as the law of the first increased and then decreased, a small amplitude.

Related Dissertations

  1. Study on Using Sepiolite As Supported Catalysts in Selective Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol,O643.32
  2. Study on Preparing the High Performance Fiber and Nonaporous Fiber by High Viscosity Nylon-6,TQ342
  3. Study on Spinning of High Viscosity Polyamide-6/Rare Earth,TQ340.64
  4. Schiff base Synthesis, Characterization and Antibacterial Properties,O641.4
  5. Carbon fiber reinforced epoxy resin surface treatment and interfacial properties of composite materials,TB332
  6. Preparation and Investigation on the Properties of Three-Dimensional Braided Quartz Fiber Reinforced Composites,TB332
  7. Fabrication of Microscale Ordered-reinforced Composite and Its Mechanical Characterization,TB33
  8. Lactic acid -based copolymer / vermiculite ceramic composites and properties of,TB332
  9. Processing of SiC_f /SiC Composites Prepared with LPVCS as Precursor Polymer,TB332
  10. The Buckling and Postbuckling Analysis of Flat Composite Stiffened Panels Loaded in Axial Compression,TB332
  11. The Research of Qulity of the Polyamide Resin for Bi-oriented Film,TQ323.6
  12. Polyamide 6 / elastomer / inorganic rigid particles Ternary System,TQ325.14
  13. Fe3+/Mn2+ Loaded on Sepiolite as a Heterogeneous Fenton-like Reagent and Degradation Characteristics,X13
  14. Buckling, post-buckling and Load-carrying Capacity Analysis of Stiffened Composite Panels,TB332
  15. Preparation and Electromechanical Properties of Nafion-Metal Composites,TB333
  16. Microstructure Evolution during Reheating of In-situ Reactive Near-liquidus Cast Al2O3p /Al Composites,TG249.9
  17. The Study on Characterization of Machined Surface Micro-Topography in High Speed Milling of SiC_p /Al Composites,TG506.1
  18. Hydroxyapatite / nano- cellulose Preparation and characterization of composite materials,R318.08
  19. Chitosan / alginate composite modified Preparation and Properties of Materials,R318.08
  20. Study on Non-isothermal Crystallization Kinetics and Crystalline Morphology of PET Fibers Filled iPP Composites,TB332
  21. Properties of 1-3 Polymer/Cement Based Piezoelectric Composites,TB332

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Composite materials > Non-metallic composite materials
© 2012 www.DissertationTopic.Net  Mobile