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  • Investigation Of Effects Of Two Flame Retardants On The Fire Characterisit Ics Of Flexible Poly Ether Foam

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    • REFRENCES -- [Total Page(s) 2]

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    • REFERENCES
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    • ABSRACT - [ Total Page(s): 1 ]ABSTRACTThis work studied the effects of two flame retardants on the fire characteristics of flexible polyether foam samples. Various concentrations of two flame retardants melamine and tri ammonium orthophosphate have been successfully incorporated into flexible polyurethane foam. Results of the analyses carried out on the various foam samples showed that by appropriate incorporation of the two flame retardants, the flammability properties (After glow time (AGT), ignition time, flame duration t ... Continue reading---

         

      APPENDIX A - [ Total Page(s): 2 ] ... Continue reading---

         

      LIST OF TABLES - [ Total Page(s): 1 ]LIST OF TABLE STable 1:    Classification of flame retardants based on nature of compoundsTable 2:    Basic formulatio n of flexible polyurethane foam Table 3:    Application of polyurethane foamsTable 4:    Formulation for polyurethane retarded with melamineTable 5:    Formulation for polyurethane retarded with tri ammonium orthophosphateTable 6:    After glow time result Table 7:    Ignition time result Table 8:    Flame propagation resultTable 9:    The percentage c ... Continue reading---

         

      LIST OF FIGURES - [ Total Page(s): 1 ]LIST OF FIGURESFig. 1:    The combustion process of plasticsFig. 2:    Classes of flame reta rdants based on durabilityFig. 3:        Effects of concentration of flame retardants on After glow time of flexible polyurethane foam.Fig. 4:        Effects of concentration of flame retardants on ignition time of flexible polyurethane foam.Fig. 5:        Effects of concentration of flame retardants on flame propagation of flexible polyurethane foam.Fig. 6:        Effects o ... Continue reading---

         

      TABLE OF CONTENTS - [ Total Page(s): 1 ]TABLE OF CONTENTSTitle page    Certification  Dedication  Acknowledgements  Abstract Table of contents  List of table    List of figures   CHAPTER ONE INTRODUCTION    1.1    Background of the study   1.2    Significance of the Research.    1.3    Scope of the Study  1.4    The objectives of the Study;  CHAPTER TWO2.1    Fire, Pyrol yses and Combustion    2.1.2 Pyrolysis of Plastics    2.1.3    Pyrolysis of Polyurethane foams    2.2    Flame Ret ... Continue reading---

         

      CHAPTER ONE - [ Total Page(s): 2 ]The rising time occurs when foam mix starts to rise until it gets to a full block height. At this stage the isocyanate reacts with water to generate carbon dioxide which causes the rise. The formation of the carbon dioxide through the intermediate carbamic acids gives.RH = C = O + H – O – H    RNH COOH        RNH 2 + CO2The curing time is the reaction process that leads to completion of the polymerization reaction that is usually greater than 15 hours. Polyurethane can ei ... Continue reading---

         

      CHAPTER TWO - [ Total Page(s): 13 ]The requirements for good catalytic activity are: (a) nucleophilic enough to attack the carbon of the isocy anate group, (b) ability to form an active hydrogen amine complex, and (c) solubility in water with the ability to form hydrogen bonds with water.Since electron accessibility is also usually measured by the basicity, the catalytic activity is found to generally increase as the basicity increase. Thus, a plot of pH vs. catalytic activity usually yields linear behavior. Howe ver, exception e ... Continue reading---

         

      CHAPTER THREE - [ Total Page(s): 2 ]CHAPTER THREEEXPERIMENTAL3.1    Materials and MethodsThe materials include:1.    Polyol2.    Toluene diisocynate (TDI)3.    Silicone4.    Dimethylethanol amine5.    Water6.    Stanous octate or Tin II7.    Melamine8.    Tri ammonium orthophosphateMaterial (1 – 6) above were all obtained from Marthar foams industries Ltd., Nkpor – Obosi Road, Onitsha Anambra State Nigeria.Melamine and tri ammonium orthophosphate were bought from Laboratory of National Rese ... Continue reading---

         

      CHAPTER FOUR - [ Total Page(s): 5 ]4.3    Flame Propagation RateThe effects of the flame retardants on flame propagation rate of the polyurethane foam are shown in Table 8, fig. 5, from the results, it is obvious that the flame propagation rate reduced with the increase in concentration of the two flame retardants. However, tri ammonium orthophosphate showed a higher impact of reduction of the propagation rate more than melamine. Flame propagation rate is simply the velocity of the flame along the vertical length of the materi ... Continue reading---

         
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