Journal of Textile Research ›› 2018, Vol. 39 ›› Issue (11): 61-67.doi: 10.13475/j.fzxb.20180102707

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Durability of high strength polypropylene spunbonded needle punctured geotextile

    

  • Received:2018-01-12 Revised:2018-08-13 Online:2018-11-15 Published:2018-11-19

Abstract:

In order to strdy the aging resistance and chemical crrosion resistance of high strength coarse denier polypropylene apunbonded needle punctured geotextile (HPP), samples were measured by theumo-oxidative aging, acid and alkali solution and pure water immersion. The effects of different temperatures and different chemical environments on their durability were studied and compared with the durability of ordinary polypropylene geotextiles (PP). The results show that the mass retention rates of HPP geotextiles after treating for 25 d are 99.06%, 98.85%and 98.10%, respectively, at 110?C,  120?C and  130?C. The retention rate of PP geotextiles after treating for 25 d is 98.89%, 98.78% and 97.78%, respectively. The retentionrate of longitudinal fracture strength of HPP geotextiles after treating for 25 d is 75.00%, 67.25% and 64.71%, respectively at 110?C,  120?C and  130?C. At the same temperature circumstance the retention rate of longitudinal fracture strength of PP geotextiles is 72.15%, 65.56% and 54.00%, respectively. The strength loss rate of HPP geotextiles treated by three kinds of olpuids is less than 5%, indicating HPP has good corrosion resistance. The expression of the thermal reaction rate of HPP geotextiles is fitted by Arrhenius theory, and the retention rate of HPP geotextiles predicted is 27.30% after 50 a.

Key words: polypropylene spunbonded needle punctured geotextile, thermal oxygen aging, life prediction, aging mechanism

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