Effect of jet fuel on thermal properties of thermoplastic polyurethane

doi:10.19491/j.issn.1001-9278.2024.05.007

Abstract

Abstract:

Thermoplastic polyurethane （TPU） elastomers have been widely used in the storage and transportation of petroleum products due to their excellent wear resistance and solvent resistance. During the storage and transportation processes of jet fuel， The TPU equipment has to face various complex transportation environments. In such processes， the TPU hoses may be affected by the dual effects of jet fuel and ultraviolet radiation. If this impact causes their thermal characteristics to no longer meet the demand and results in an economic loss and environmental problems. Therefore， the impact of jet fuel on the thermal performance of TPU during storage and transportation cannot be ignored. In this study， differential scanning calorimetry and thermogravimetry analysis were conducted to investigate the thermal performance of the TPU treated with jet fuel and UV irradiation. The results indicated that a long⁃term immersion in jet fuel led to an increase in the glass transition temperature and a decrease in the thermal stability of TPU. After treatment with jet fuel， the TPU samples exhibited an exothermic peak at 150 ℃ as a result of the presence of crystallization.

Key words: thermoplastic polyurethane, oil storage and transportation, modulation differential scanning calorimetry, soft oil pipeline, thermal decomposition

CLC Number:

TQ323.8

ZHAO Hanyang, YAN Ge, YANG Yong, JI Xiaona, WANG Xin, LIU Wenyan. Effect of jet fuel on thermal properties of thermoplastic polyurethane[J]. China Plastics, 2024, 38(5): 33-39.

Figures/Tables 14

Fig.1. Structural formula of 8185RV

Fig.2. TG and DTG curve of TPU standard sample 1 after quenching treatment

Fig.3. DSC test results of TPU standard sample 1 after quenching treatment

Fig.4. mDSC test results of TPU standard sample 1 after quenching treatment

Fig.5. TG and DTG curve of TPU standard sample 2 after annealing

Fig.6. DSC test results of standard sample 2 after annealing

Fig.7. mDSC test results of TPU standard sample 2 after annealing

Fig.8. TG and DTG curves of TPU treated with jet fuel for different time

Fig.9. DSC test results of TPU treated with jet fuel for different time

Fig.10. mDSC test results of TPU treated with jet fuel for different time

Fig.11. TG and DTG curves of TPU aged for 6 h under UV irradiation

Fig.12. mDSC test results of TPU after UV aged for 6 h

Fig.13. Molecular weight distribution of the aged samples

样品	重均分子量	数均分子量	分散性系数
标准样2	110 900	76 899	1.44
未经喷气燃料处理老化6 h	105 244	63 704	1.65
喷气燃料处理老化6 h	103 170	45 803	2.25

Tab.1. Molecular weight of the aged samples

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