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Rheological Behavior and Microstructure of Flame Retardant Polypropylene Composites

[+] Author Affiliations
Guo Jiang, Juan-Juan Han, De-Xian Feng, Han-Xiong Huang

South China University of Technology, Guangzhou, China

Kai Liao

Momentive Fine Performance Material (Shenzhen) Co., Ltd., Shenzhen, China

Paper No. IMECE2010-38052, pp. 415-418; 4 pages
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 10: Micro and Nano Systems
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4447-2
  • Copyright © 2010 by ASME


Polypropylene (PP)/magnesium hydroxide (MDH) composite was melt-mixed using a twin-screw extruder. Two types of MDH were used, one with the modification of silane and another without. The rheological behavior was measured by capillary and dynamical rheometer. Microstructure of these composites was observed by SEM. Their flame retardancy was characterized by oxygen index and Horizontal/Vertical burning test. Results showed that shear viscosity and complex viscosity of PP with modified MDH were lower than that of PP with non-modified MDH. SEM results also showed a better dispersion of silane modified MDH in PP matrix. With the increase of MDH content, the oxygen index of composites was increased. When the content was increased to 60 wt%, the composite was UL94 HB and V-1.

Copyright © 2010 by ASME



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