Kwabena A. Narh

Contact Info

Title: Professor, Associate Chair, Undergraduate Advisor
Email: kwabena.a.narh@njit.edu
Office: 202 MEC
Hours: Contact: 1-973-596-3331
Phone: 973-596-3353
Dept: Mechanical Engineering
Webpage: http://mechanical.njit.edu/people/narh.php
About: 

About Me

Kwabena A. Narh is a Professor and Associate Chair of Mechanical Engineering for Undergraduate Studies, and Director of the National Science Foundation funded NJIT Research Experience for Undergraduates Site (NSF-REU site) at the New Jersey Center for Engineered Particulates. He also serves as Outreach coordinator for the NSF funded Engineering Research Center (ERC) for Structured Organic Composites for Pharmaceutical, Nutraceutical, and Agrochemical Applications (C-SOC).

Prof. Narh´s research focuses on crystallization kinetics and phase transitions in plastics processing, polymer degradation and melt extrusions. His research activities involve experiments as well as computer simulations applied to self-reinforcing composites and nanocomposites, carbon nanotube dispersions, and thermal contact resistance in material processing. His research is funded by the National Science Foundation.

Academic and Research Appointments

  • Associate Chair for Undergraduate Studies, August 2008 - Present
  • Professor, Department of Mechanical Engineering, New Jersey Institute of Technology June 2008 - Present.
  • Visiting Professor: Materials Science and Engineering Department, University of Florida, August 2001 – July 2002.   
  • Associate Professor, Department of Mechanical Engineering New Jersey Institute of Technology, Newark, New Jersey, August 2000 – June 2008.
  • Assistant Professor, Department of Mechanical Engineering New Jersey Institute of Technology, Newark, New Jersey, August 1994 – July 2000.
  • Research Associate, Mechanical and Aerospace Engineering Dept., Cornell University, Ithaca, December 1992 – July 1994. 
  • Research Associate, Institute of Materials Science, University of Connecticut, December 1991 – November 1992.

Education

  • University of Bristol (U.K.),   Ph. D1982   
  • University of Bristol (U.K.),   MS 1979   
  • University of Ghana, BS 1974

 

Professional Activities

 

  • Editor of P.A.D. Review, Newsletter of the Polymer Analysis Division of SPE, 2006 - Present
  • Chair of Award Committee, Polymer Analysis Division of the Society of Plastics Engineers, 1998-2006.
  • Technical Program Chair, Polymer Analysis Division, SPE ANTEC 2001.
  • Chairman the Polymer Analysis Division of SPE Division, 2001-2002

Awards and Honors

  • 1999 Maro Publications Future Technology Award: Title of Paper: “The Effect of Shrinkage Induced Interface Gap on the Thermal Contact Resistance Between the Mold and Plastic in Injection Molding”;    
  • 1995 Best Paper Award: Polymer Analysis Division of the Society of Plastics Engineers: Title of Paper Title of Paper: "Rheo-Kinetic Measurements for the Determination of Stress-Induced Crystallinity In PET."

Website

http://mechanical.njit.edu/people/narh.php
Research: 

Research Interests

Crystallization kinetics and phase transitions in plastics processing, polymer degradation, melt extrusions, PVT measurements, self-reinforcing composites, nanocomposites, nanocrystallization, thermal contact resistance in material processing. My research activities on these topics involve experiments as well as computer simulations.

Publications: 

Publications

 

1.       Narh, K.A., Agwedicham, Ahmed-Tijani and Jallo, Laila, “Dry Coating Polymer Powder Particles with Deagglomerated Carbon Nanotubes to Improve their Dispersion in Nanocomposites,” Powder Technology, 186 (3), 2008, p. 206-212.
2.       Narh, Kwabena A., Jallo, Laila and Rhee, Kyong Y., “The Effect of Carbon Nanotube Agglomeration on The Thermal And Mechanical Properties of Polyethylene Oxide,” Polymer Composites, 29 (7), 2008, p. 809-817.
3.       Narh, K.A., “Liquid Crystalline Blends as Route to Self-Reinforcing Nanocomposites,” J. Reinforced Plastics and Composites, In Press, 2007.
4.       Zhu, L. & Narh, K. A., “A Simplified Model for the Melting of Polymer Pellets Under Compression in a Twin Screw Extruder”. Simulation, 82, 2006, p. 543-548.
5.       Zhu, L., Narh, K.A. and Hyun, K.S., "Application of Numerical Simulation of Reactive Extrusion in Predicting Residence Time Distribution in Extruders," P.A.D. Review, vol. 33, 2005, p.3.
6.       Zhu, L., Narh, K.A. and Hyun, K.S., “Investigation of Mixing Mechanisms and Energy Balance in Reactive Extrusion Using 3-D Numerical Simulation Method,” Int. J. Heat and Mass Transfer, 48, 2005, p. 3411-3422.
7.       Zhu, L., Narh, K.A. and Hyun, K.S., “Evaluation of Numerical Simulation Methods in Reactive Extrusion,” Adv. Polym. Tech., 24, 2005, p. 183-193.
8.       Zhu, L. and Narh, K.A., “Numerical Simulation of the Effect of Fiber Orientation on Tensile Modulus of Carbon Nanotube Reinforced Polymer Composites,” Polymer International, 53, 2004, p. 1461-1466.
9.       Zhu, L. and Narh, K.A., “Numerical Simulation of the Tensile Modulus of Nano-clay Filled Polymer Composites,” J. Polym. Sci. Part B: Polym. Phys., 42, 2004, p.2391-2406.
10.   Guo, J. and Narh, K.A., “On the Prediction of Crystallinity Distribution in Injection Molded Semi-Crystalline Thermoplastics,” Journal of Reinforced Plastics and Composites 21: 2002, p. 497-506.
11.   Guo, J. and Narh, K.A., “Simplified Model of Stress-Induced Crystallization Kinetics of Polymers,” Advances in Polym. Tech., 21: 2001, p. 214-222.
12.   Guo, J. and Narh, K.A., “Computer Simulation of Stress-Induced Crystallization in Injection Molded Thermoplastics,” Polym. Eng. Sci., 41: 2001, p. 1996-2012.
13.   Zhu, L., Narh, K.A. and Geng, Z., “Modeling of Particle Dispersed Melting Mechanism and its Application in Co-rotating Twin Screw Extrusion,” J. Polym. Sci. B: Polym. Phys., 39: 2001, p. 2461-2468.
14.   Li, Z. and Narh, K.A., “Experimental Determination and Numerical Prediction of Mechanical Properties of Injection Molded Self-Reinforcing Polymer Composites,” Composites B: 32(2), 2001, p. 103-109.
15.   Narh, K.A. and Sridhar, L., “A Combined Experimental and Inverse Method for Determination of Thermal Properties and Thermal Contact Resistances for Thin Plastic Specimens”, P.A.D. Review, 28(2), 2000 p. 7.
16.   Sridhar, L., Sedlak, B.M. and Narh, K.A., “Parametric Study of Heat Transfer in Injection Molding - Effect of Thermal Contact Resistance,” J. Manuf. Sci. Eng. 122, 2000, 698-705. (peer reviewed)
17.   Sridhar, L. and Narh, K.A., “Finite Size Gap Effects on Thermal Contact Conductance Modeling at the Polymer-Mold Wall Interface in Injection Molding,” J. Appl. Polym. Sci. 75: 2000, p. 1776-1781.
18.   Narh, K.A., Zhang, Q. and Li, Z., “The Effect of Mixing on the Properties of Liquid Crystalline Polymer/Polyethylene (terephthalate) Blend,” J. Appl. Polym. Sci. 75: 2000, 1783-1787. (peer reviewed)
19.   Sridhar, L., Yin, W. and Narh, K.A., “The Effect of Shrinkage Induced Interface Gap on the Thermal Contact Resistance Between the Mold and Plastic in Injection Molding,” J. Injection Molding Technol. 4: 2000, p. 44-49.
20.   Narh, K.A. and Li, Z., “Morphological Development During Injection Molding of Self-Reinforcing Composites: I. Experimental Results,” Polym. Compos. 21(5), 2000, p. 751-761.
21.   Li, Z and Narh, K.A., “Morphological Development During Injection Molding of Self-Reinforcing Composites: II. Numerical Simulations and Analytical Predictions,” Polym. Compos. 21, 2000, p. 978-987.
22.   Guo, J., and Narh, K.A., "Buckling Analysis in a Plastic-Steel Stud for Building Applications", Simulation: 75, 2000, p. 100-108.
23.   Sridhar, L. and Narh, K.A., “The Effect of Temperature Dependent Thermal Properties on Process Parameter Prediction in Injection Molding,” Intl. Comm. Heat Mass Transfer 27: 2000, p. 325.
24.   Narh, K.A. and Surjanhata, H., "Innovations in Freshman Mechanical Engineering Curriculum at NJIT" Intern. J. Eng. Educ.: 16, 2000, p. 457-467.
25.   Sridhar, L. and Narh, K.A., “Computer Simulation of the Effect of Thermal Contact Resistance on Cooling Time in Injection Molding,” Simulation 73(3): 1999, p. 144-148.
26.   Xanthos, M. and Narh, K.A., “Product Design with Glass Fiber Reinforced Polymer Blends with Potential Applications in Recycling,” Polym. Compos. 19: 1998, p. 768.
27.   Narh, K.A., Guo, J. and Li, Z., “Modeling of Flow and Mechanical Properties of ASR-filled Polymer Composites,” Polym. Compos. 19, 1998, p. 787.
28.   Narh, K.A., Dwivedi, V.P., Grow, J.M., Stana, A. and Shih, W.-Y., “The Effect of Liquid Gallium on the Strengths of Stainless Steel and Thermoplastics,” J. Mat. Sci. 33: 1998, p. 329.