The mechanical and tribological properties of grafted LDPE-filled SiO 2 /PTFE composite

In this article, low-density polyethylene (LDPE) rubber and silica (SiO 2 ) particles were employed to modify polytetrafluorethylene (PTFE) simultaneously. The distribution and dispersion of LDPE and SiO 2 particles in PTFE matrix can be adjusted by the wettability of SiO 2 particles toward PTFE and...

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Bibliographic Details
Published in:Journal of thermoplastic composite materials 2014-06, Vol.27 (6), p.783-792
Main Authors: Chang, Daofang, Huang, Youfang, Tang, Gang, Huang, Jiahui, Huang, Wanjuan
Format: Article
Language:English
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Summary:In this article, low-density polyethylene (LDPE) rubber and silica (SiO 2 ) particles were employed to modify polytetrafluorethylene (PTFE) simultaneously. The distribution and dispersion of LDPE and SiO 2 particles in PTFE matrix can be adjusted by the wettability of SiO 2 particles toward PTFE and LDPE, so as to achieve a simultaneous enhancement of toughness and modulus of PTFE. A unique structure with the majority of PTFE surrounded by SiO 2 particles was first observed using maleic anhydride (MAH)-grafted LDPE, resulting in a dramatical increase in Izod impact strength as the rubber content in the range of brittle–ductile transition (4–16 wt%). The friction and wear properties were obviously improved with the addition of MAH-grafted LDPE regardless of the content of SiO 2 .
ISSN:0892-7057
1530-7980
DOI:10.1177/0892705712454870