Canadian Journal of Applied Sciences

ISSN: 1925-7430
Short Key Title: Can J App Sci
Start Year: 2011

Marwa. A. Sherief
(1) Inorganic chemistry department, National Research Centre, 33 Elbohooth St.(Tahrir) Dokki, P.O.Box: 12622, Postal code: 11787, Giza, Egypt (2) Polymer department, National Research Centre, 33 Elbohooth St.(Tahrir) Dokki, P.O.Box: 12622, Postal code: 11787, Giza, Egypt
Keywords: Flame retardant, polypropylene, Ammonium polyphosphate, Thermal analysis, Cone Calorimeter

The prepared nano sized ammonium polyphosphates (APP) from ammonium dihydrogen phosphate and urea in the presence of ammonia solution was evaluated as flame retardant for polypropylene (PP). The results of study show that negligible change has occurred on the mechanical properties with APP addition. Both the thermogravimetric analysis (TG and DTA) and the cone calorimeter method were used for evaluation of PP/APP system. The results of TG and DTA show that the addition of APP with different percentage (1,3,5,10%) leads to decrease in the Tonset and increase in the Toutset, the calculated time of the complete degradation increases. This behavior means that the addition of different percentages of APP improve the flammability of PP. The total heat release (THR), the heat release rate(HRR), the mass loss rate (MLR), the time of ignition, the effective heat of combustion(EHC), and the smoke production and toxic gas formation were estimated from the profile of the cone calorimeter curves. From these parameters, it is observed that all the parameters decrease by adding APP to PP. From the analysis of data, it may be conclude that the addition of APP to PP improves the flammability without remarkable effect on the mechanical properties.

Article Information

Identifiers and Pagination:
First Page:39
Last Page:50
Publisher Id:CanJAppSci (2015 ). 5. 39-50
Article History:
Received:February 19, 2015
Accepted:June 30, 2015
Collection year:2015
First Published:July 3, 2015

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Editor in Chief
Xianghui Qi (PhD)
Jiangsu University, Zhenjiang, China


Dr. Xianghui Qi is working as Professor in the School of Food & Biological Engineering, Jiangsu University, China. His research interests: Biosynthesis of high value-added chemicals by microbes and engineered strains; Discovery of novel genes, enzymes and new strains; Rational & Irrational design of microbial enzymes; Isolation, identification and evolution of microbes; Metabolic engineering & Pathway engineering of functional microbes, and biotransformation; Metabolic regulation based on the research of microbial omics; Application of high value-added products including functional sugar alcohols by biosynthesis and biotransformation based on microbial engineered strains.

Journal Highlights
Abbreviation: Can J Appl Sci
Frequency: Annual
Current Volume: 7 (2017)
Next scheduled volume: December, 2018  
Back volumes: 1-7
Starting year: 2011
Nature: Online
Submission: Online
Language: English

Subject & Scope
  • Biochemistry and Biotechnology
  • Bioinformatics and Biometric
  • Chemical Technology
  • Dentistry and Hygiene
  • Environmental Health, Safety and Allied Sciences
  • Food and Nutrition
  • Health Management
  • Medical Sciences
  • Molecular/ Cellular Biology
  • Pharmaceutical Sciences
  • Pharmacotherapy
  • Theoretical Models (health, life and clinical practice)
  • Veterinary, Fishery and Animal Biology

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