Zhang, C. C.; Yang, J. L.; Huang, Y. J.; Li, G. X. Highly improved creep resistance in polypropylene through thermally reduced graphene oxide and its creep lifetime prediction. Chinese J. Polym. Sci. 2024, 42, 256–266
Can-Can Zhang, Jun-Long Yang, Ya-Jiang Huang, et al. Highly Improved Creep Resistance in Polypropylene Through Thermally Reduced Graphene Oxide and Its Creep Lifetime Prediction[J]. Chinese Journal of Polymer Science, 2024, 42(2): 256-266.
Zhang, C. C.; Yang, J. L.; Huang, Y. J.; Li, G. X. Highly improved creep resistance in polypropylene through thermally reduced graphene oxide and its creep lifetime prediction. Chinese J. Polym. Sci. 2024, 42, 256–266DOI: 10.1007/s10118-023-3028-x.
Can-Can Zhang, Jun-Long Yang, Ya-Jiang Huang, et al. Highly Improved Creep Resistance in Polypropylene Through Thermally Reduced Graphene Oxide and Its Creep Lifetime Prediction[J]. Chinese Journal of Polymer Science, 2024, 42(2): 256-266.DOI: 10.1007/s10118-023-3028-x.
Highly Improved Creep Resistance in Polypropylene Through Thermally Reduced Graphene Oxide and Its Creep Lifetime Prediction
The creep failure lifetime of PP is increased by 21.5 times by adding 2.0 wt.% TrGO due to the homogeneously dispersed TrGO-formed particle network. By combining the time-strain superposition method
generalized creep compliance curves were established
facilitating the prediction of creep failure lifetimes.
Abstract
Polypropylene (PP) exhibits suboptimal creep resistance due to the presence of methyl groups on its main chain
leading to irregular chain segment distribution
diminished inter-chain interaction
and crystallinity. This structural feature causes chain slippage in PP under stress
significantly constraining its service lifetime. In this study
thermally reduced graphene oxide (TrGO) nanosheets were incorporated into the PP matrix
yielding a nanocomposite with exceptional creep resistance performance. Results demonstrated that at a stress of 25 MPa
a 2.0 wt% TrGO content could enhance the creep failure lifetime of PP by 21.5 times compared to neat PP. Rheology
transmission electron microscopy (TEM)
and scanning electron microscopy (SEM) characterization techniques were employed to analyze the mechanism of TrGO's influence on PP's creep behavior. It was observed that when TrGO content exceeded 1.0 wt%
an effective particle network structure formed within the PP matrix. This homogeneously dispersed TrGO-formed particle network structure restricted the migration and rearrangement of PP molecular chains
enabling prolonged stress resistance without structural failure. By combining the time-strain superposition method with the critical failure strain as a criterion
generalized creep compliance curves for PP and its composites were established
facilitating the prediction of material creep failure lifetimes
with a strong agreement between experimental and predicted lifetime values. This research proposes a novel strategy aimed at developing polypropylene materials and products with enhanced long-term stability and durability
thus extending service life
reducing failure risk
and broadening their potential across various application domains.
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