Kevlar<sup>TM</sup> Fiber-Reinforced Polybenzoxazine Alloys for Ballistic Impact Application

  • Sarawut Rimdusit Chulalongkorn University
  • Somsiri Pathomsap Chulalongkorn University
  • Pornnapa Kasemsiri Chulalongkorn University
  • Chanchira Jubsilp Srinakharinwirot University
  • Sunan Tiptipakorn Kasetsart University
Keywords: Polymer alloys, Kevlar<sup>TM</sup> fiber, ballistic composite, polybenzoxazine, urethane prepolymer.

Abstract

A light weight ballistic composites from KevlarTM-reinforcing fiber having polybenzoxazine (BA)/urethane prepolymer (PU) alloys as a matrix were investigated in this work. The effect of alloy compositions on the ballistic composite properties was determined. The results revealed that the enhancement in the glass transition temperature (Tg) of the KevlarTM-reinforced BA/PU composites compared to that of the KevlarTM-reinforced polybenzoxazine composite was observed. The increase of the elastomeric PU content in the BA/PU alloy resulted in samples with tougher characteristics. The storage modulus of the KevlarTM-reinforced BA/PU composites increased with increasing the mass fraction of polybenzoxazine. A ballistic impact test was also performed on the KevlarTM-reinforced BA/PU composites using a 9 mm handgun. It was found that the optimal contents of PU in the BA/PU alloys should be approximately 20wt%. The extent of the delaminated area and interfacial fracture were observed to change with the varied compositions of the matrix alloys. The appropriate thickness of KevlarTM-reinforced 80/20 BA/PU composite panel was 30 plies and 50 plies to resist the penetration from the ballistic impact equivalent to levels II-A and III-A of NIJ standard. The arrangement of composite panels with the higher stiffness panel at the front side also showed the best efficiency of ballistic penetration resistance.

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Author Biographies

Sarawut Rimdusit

Polymer Engineering Laboratory, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Somsiri Pathomsap

Polymer Engineering Laboratory, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Pornnapa Kasemsiri

Polymer Engineering Laboratory, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Chanchira Jubsilp

Department of Chemical Engineering, Faculty of Engineering, Srinakharinwirot University, Khong 16, Ongkharak, Nakhonnayok 26120, Thailand

Sunan Tiptipakorn

Department of Chemistry, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen, Nakhon Pathom 73140, Thailand

Published In
Vol 15 No 4, Sep 3, 2011
How to Cite
[1]
S. Rimdusit, S. Pathomsap, P. Kasemsiri, C. Jubsilp, and S. Tiptipakorn, “Kevlar<sup>TM</sup&gt; Fiber-Reinforced Polybenzoxazine Alloys for Ballistic Impact Application”, Eng. J., vol. 15, no. 4, pp. 23-40, Sep. 2011.