Dissertation > Excellent graduate degree dissertation topics show

Study of Morphology and Properties of PP/EPDM/Nano-CaCO3 Ternary Composites

Author: XuKeJie
Tutor: WangXu
School: Zhejiang University of Technology
Course: Materials Science
Keywords: polypropylene(PP) ethylene-propylene-diene terpolymer(EPDM) nano-CaCO3 composite toughen morphology
CLC: TB332
Type: Master's thesis
Year: 2009
Downloads: 219
Quote: 0
Read: Download Dissertation

Abstract


In this paper,polypropylene（PP）/ethylene-propylene-diene terpolymer（EPDM）/nano calcium carbonate（nano-CaCO3） ternary composites were prepared by two step compounding route,in which nano-CaCO3 and EPDM were mixed first,and then melt blended with pure PP.The dynamic mechanical properties of EPDM/nano-CaCO3 masterbatch and the relationship beween the morphology and the properties of the PP ternary composites toughened by masterbatch composed of EPDM and nano-CaCO3 were studied systematically.The key works and conclusions were listed as following:1.The influences of the dosage of nano-CaCO3 and the mixing time on the dynamic mechanical properties of EPDM/nano-CaCO3 masterbatch were characterized by dynamic mechanical analyzer（DMA）. The results showed that dynamic mechanical performance of the masterbatch being mixed for 15 min with about 70wt%nano-CaCO3 was excellent at room temperature.When the masterbatch of nano-CaCO3 and EPDM was dispersed in the PP matrix,these particles could dissipate lots of energy by collaborative deformation of nano-CaCO3 agglomerate and EPDM,fibrillation induced by interfacial debonding and inducing PP shear band between disperse phase,which markedly improved the toughness of PP/EPDM/nano-CaCO3 ternary composite.2.The influence of the surface properties of nano-CaCO3 on the mechanical properties,fracture morphology,rheological behavior and crystallization behavior of the PP ternary composites was studied. Synergistic toughening effects of EPDM and nano-CaCO3 on PP matrix were discussed.When the composite is subjected to external force,on the one hand,there is an synergetic effect on toughness of PP ternary composites between EPDM and nano-CaCO3 as the binary masterbatch occurres,on the other hand,cavity formed by dispersed phase-matrix debonding,fibrillation at the interface and plastic deformation of PP can absorb lots of energy.In addition,the shear yielding of PP matrix can be induced and promoted by the void induced by interfacial debonding between nano-CaCO3 agglomerate and PP matrix,which markedly improved the toughness of PP/EPDM/nano-CaCO3 ternary composite.3.Distribution of nano-CaCO3 in PP ternary composites at different mixing time was studied.Migration phenomena were discovered.Sheared field of the polymer fluid in internal mixer was simulated by using POLYFLOW software.The influence of shear strength on nano-CaCO3 distribution was studied.

Related Dissertations

  1. The Preparation and Thermoelectric Properties of Rare Earth Subsituted Ag Composite Ca3Co4O9-Based Oxides,TQ174.1
  2. Synthesis, Structure and Properties of PBO/SWNT Composite Fibres,TQ340.64
  3. Study on Properties of Thermal Shock and Ablation Resistance for Gr/Al-Mg Composites,TB332
  4. Study on Theory and Experiment of Wire Drawing with Composite Ultrasonic Vibration,TG663
  5. Technology of Filling Clearance and Optimizing the Bonds during Ultrasonic Brazing,TG454
  6. Study of Tin Alloy Carbon Composite Used for Lithium Ion Battery,TM912.9
  7. Tongue Feature Extraction and Research of Fusion Classification,TP391.41
  8. Research on Control System and Head of 7-Axis NC Fiber Placement Machine,TG659
  9. The Properties of Laser Speckle Based on the Mathematical Morphology,O29
  10. Study on Preparation of Composite Cross-linked Modified Modified Potato Starch,TS236.9
  11. Municipal tourism land use planning environmental impact assessment,X820.3
  12. The Combined Effect of Several Environmental Factor on Fertilization, Hatching and Juvenile Growth of Nile Tilapia,S917.4
  13. Research on the Theory of the Transmission-line Metamaterials and Their Applications,O441.6
  14. Of Bi N Co-doped TiO \u003csub\u003e 2 \u003c/ sub\u003e of the preparation and performance,O614.411
  15. Road extraction algorithm based on region segmentation of remote sensing image,TP751
  16. Research of Anomaly Detection Algorithms of Hyperspectral Imagery Based on Kernel Method,TP751
  17. Effects of Nitrogen Fertilizer on Morphological Development of Alfalfa Root,S541.9
  18. Studies on Leaf Epidermal and Pollen Micro-morphology and Geographical Distribution of the Genus Euonymus of Henan,Q944
  19. Sagitta Morephology, Distribution, Biology and Stock Assessment of Four Prlagic Species in the Mouth of Beibu Gulf,S932.4
  20. Technology of Blood Vessel Diameter Measurement Automatic Based on Digital Image Processing,R310
  21. Preparation and Characteration of Composite Microspheres with Dual-, Triple- Responsive Properties,O631.3

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