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The Effect of Surface Modification of Polytetrafluoroethylene (PTFE) on the Properties of POM/PTFE Fiber Composites

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Abstract:

Surface modification of polytetrafluoroethylene (PTFE) fiber by plasma grafting polymerization with acrylamide (AAm) was studied to improve the compatibility between polyacetal (POM) and PTFE. The best modified PTFE manufactured by self-designed plasma polymerization was investigated and denoted as AAm (20wt%)-g (plasma 30min)-PTFE. The grafting polymerization is successful and shown by ESCA spectra of modified PTFE fibers. It is also proved by SEM photographs and the improvement of properties of the POM/PTFE composites. As a result, the friction coefficients, Taber wear factors, and impact strengths of composites with 85wt% of POM and 15wt% of a variety of PTFEs were investigated. The frictional coefficient of POM/ AAm (20wt%)-g (plasma 30min)-PTFE deceased to 0.162; while that of POM/PTFE was 0.174. Taber wear factor of the composite significantly decreased from 5.2 to 1.5 when the PTFE was replaced by AAm-g (plasma)-PTFE. Meanwhile, the impact strength increased from 6.1 kg-cm/cm (POM/PTFE) to 9.3kg-cm/cm (POM/ AAm-g (plasma)-PTFE). Besides, the multi-yield behaviors were found in the Stress-Strain curves of composites with modified PTFE fibers.

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Periodical:

Key Engineering Materials (Volume 642)

Pages:

253-258

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.642.253

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Online since:

April 2015

Authors:

Chi Yuan Huang*, Mei Chuan Kuo, Min Lih Roan

Keywords:

AAm-g(plasma)-PTFE, Mechanical Property, Plasma Polymerization, POM, PTFE, Taber Wear Factor

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* - Corresponding Author

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