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Temperature memory effect in differential scanning calorimeter test in thermoplastic polyurethane

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Abstract

The temperature memory effect (TME) in differential scanning calorimeter test of a thermoplastic polyurethane is investigated in two ways: one is termed TME1, in which the material is cooled down for full crystallization during thermal cycling; while the other is termed TME2, in which the material is cooled, but before any crystallization occurs. In the case of single heating stop temperature (Ts), for TME1, the temperature gap (△T) is almost a constant; while for TME2, △T roughly increases in a linear manner with the increase of Ts. We also extend the study to multiple heating stops (upon to four stops) in TME2. It is confirmed that a higher heating stop temperature is able to eliminate the influence of the previous heating cycles if their corresponding heating stop temperature is lower. It is concluded that in all tests (for both TME1 and TME2), △T may be estimated as Ts + 1.6 °C with an accuracy of about ±0.5 °C or 4.1 %. A schematic sketch to reveal the origin of △T is presented.

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Acknowledgments

This project is partially supported by National Natural Science Foundation of China (51578347) PR China, and Shanghai Natural Science Foundation (No. 15ZR1428200), PR China.

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Authors and Affiliations

  1. School of Civil Engineering, Shenyang Jianzhu University, Shenyang, 110168, People’s Republic of China

    Li Sun

  2. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore

    Tao Xi Wang, Wei Chong Leow & Wei Min Huang

  3. Shanghai Institute for Minimally Invasive Therapy, University of Shanghai for Science and Technology, Shanghai, 200093, People’s Republic of China

    Haipo Cui

  4. School of Aeronautics Engineering, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    Xiang Yang Gao

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  1. Li Sun
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  2. Tao Xi Wang
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  3. Wei Chong Leow
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  4. Wei Min Huang
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  5. Haipo Cui
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Correspondence to Wei Min Huang.

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Sun, L., Wang, T.X., Leow, W.C. et al. Temperature memory effect in differential scanning calorimeter test in thermoplastic polyurethane. J Polym Res 23, 63 (2016). https://doi.org/10.1007/s10965-016-0958-9

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  • DOI: https://doi.org/10.1007/s10965-016-0958-9

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