Effect of Surface Modification and Hybridization of UHMWPE Fibers on Performance of their Composites with Epoxy Resin

doi:10.11901/1005.3093.2015.274

Chinese Journal of Materials Research

2015, Vol. 29

Issue (11): 807-813 DOI: 10.11901/1005.3093.2015.274

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Effect of Surface Modification and Hybridization of UHMWPE Fibers on Performance of their Composites with Epoxy Resin

Jun QIU(

),Zengyi WANG,Qian SUN,Xueyuan GAO

Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China

Cite this article:

Jun QIU,Zengyi WANG,Qian SUN,Xueyuan GAO. Effect of Surface Modification and Hybridization of UHMWPE Fibers on Performance of their Composites with Epoxy Resin. Chinese Journal of Materials Research, 2015, 29(11): 807-813.

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Abstract

Ultra high molecular weight polyethylene (UHMWPE) fibers possess outstanding properties such as high tensile strength and low density. However, their low surface polarity and poor heat resistance restrict the application of UHMWPE fibers as a reinforcing material for high performance composites. These shortcomings of UHMWPE fibers can be overcome by ultraviolet (UV) assisted grafting treatment and hybridization with aramid fibers. Results show that UHMWPE fibers could firstly be modified by means of an UV radiation assisted one step grafting process with acetone as solvent and acrylic acid as monomers, then the mechanical properties of composites of epoxy resin with the modified UHMWPE fibers was greatly enhanced; with the increasing monomer content in the acetone solvent, the tensile strength of UHMWPE fibers/epoxy resin composites increased obviously, while there was no significant change of flexural strength and impact strength. In order to further improve the heat resistance of UHMWPE fibers/epoxy resin composites, UHMWPE fibers were hybridized with aramid fibers and then the hybrid fibers were used as reinforcing material to produce hybrid fibers/epoxy resin composites. As a result, the deformation of the hybrid fibers/epoxy resin composites decreased by 66.7% at 90℃ compared to that of UHMWPE fibers/epoxy resin composites. The result proves that the pre-hybridization of UHMWPE fibers is an effective means to enhance the heat resistance of UHMWPE fibers/epoxy resin composites .

Key words: composites UV grafting hybridization UHMWPE fibers aramid fibers

Received: 07 May 2015

Fund: *Supported by Shanghai Programs for Science and Technology Development No. 12521102204.

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	Jun QIU
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https://www.cjmr.org/EN/10.11901/1005.3093.2015.274 OR https://www.cjmr.org/EN/Y2015/V29/I11/807

Tab1e 1 Influence of different solvent and grafting monomer on impact strength and flexural strength of composites

Fig.1 Infrared spectrum of the UHMWPE treated by different methods (a) ntreated (b) treated by AA

Fig.2 Reaction mechanism of UHMWPE fibers grafted by AA

Fig.3 Effect of the concentration of acrylic on the tensile strength and elongation at break of UHMWPE fiber multifilament reinforced composites

Fig.4 Stress-strain images of UHMWPE fiber multifilament reinforced composites treated by different concentration of acrylic, (a) untreated, (b) 20%, (c) 40%, (d) 50%

Fig.5 Surface morphology of UHMWPE fibers (a) untreated and (b) treated

Fig.6 Effect of the concentration of acrylic on the flexural strength and impact strength of composites

Fig.7 Impact fracture morphology of UHMWPE/Epoxy composites (a) untreated and (b) treated

Fig.8 Mechanical properties of Aramid/UHMWPE fibers composites and UHMWPE fibers composites

Fig.9 The deformation of composites with different fibers

Fig.10 Impact fracture morphology of different fiber composites(a) UHMWPE and (b) Aramid/UHMWPE

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