Title:
Tensile Properties of Polypropylene and Polyethylene Terephthalate Fiber Bundles in Outdoor Thermal Environment
Author(s):
Zihao Shen and Wenguang Liu
Publication:
Materials Journal
Volume:
122
Issue:
3
Appears on pages(s):
15-24
Keywords:
high temperature; polyethylene terephthalate (PET); polypropylene (PP); tensile properties
DOI:
10.14359/51746711
Date:
5/1/2025
Abstract:
To constitute an alternative to ordinary fiber-reinforced polymer
in the strengthening of existing structures, the tensile properties
of polypropylene (PP) and polyethylene terephthalate (PET) fiber
bundles in outdoor thermal environments (80 and 105°C) were
investigated. The fiber bundles were carefully removed from a
woven textile, and test specimens with a gauge length of 25 mm
were fabricated. Based on the experiments, a Weibull distribution
model of the tensile strength of the PP and PET fiber bundles was
developed. Test results show that exposure temperature and time
significantly affect the tensile strength, rupture strain, and elastic
modulus of the PP and PET fiber bundles. The strength degradation
of PP and PET fiber bundles is not obvious when exposed
to 80°C. In contrast, when exposed to 105°C, their use requires
consideration of mechanical properties’ degradation. This study
provides exact data for the use of PP and PET fiber bundles in
outdoor thermal environments.