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Electroactive shape memory effect of radiation cross-linked SBS/LLDPE composites filled with carbon black

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Abstract

The poly(styrene-b-butadiene-b-styrene) (SBS) triblock copolymer and linear low-density polyethylene (LLDPE) were blended and irradiated by γ rays to prepare shape memory polymer (SMP). Different weight fractions of conductive carbon black (CB) were filled into SMP to form a novel electroactive shape memory CB/SBS/LLDPE composite. The CB reinforced radiation cross-linked SBS/LLDPE blends for the improvement of the mechanical weakness and conductivity of SBS/LLDPE bulk and for wide practical engineering uses. The electroactive shape memory CB/SBS/LLDPE composites were investigated by electrical properties, mechanical, dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and electroactive shape memory effects. It is found that the tensile strength, storage modulus, and resistance against mechanical and thermal mechanical cycle loading in the developed composites increased due to the role of reinforcement of CB. The melting temperatures and volume resistance of the composites decreased with the increment of CB for excellent electrical conductivity of CB. The electroactive shape memory effects of developed CB/SBS/LLDPE composites were affected by CB weight fractions and applied voltage, while good shape recovery could be obtained in the shape recovery test. When the CB fraction is more than 5 wt%, full recovery can be observed after tens of seconds and shape recovery speed increased with CB fractions and voltage increasing. However, the shape recovery rate decreases slightly with increment of cycle times.

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Authors and Affiliations

  1. Department of Applied Chemistry, Northwestern Polytechnical University, Xi’an, 710129, China

    Yongkun Wang, Guangming Zhu, Xiaoping Cui, Tingting Liu, Zhe Liu & Kun Wang

  2. Scientific Research Institute the Engineering, University of CAPF, Xi’an, 710086, China

    Xiaoping Cui

Authors
  1. Yongkun Wang
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  2. Guangming Zhu
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  3. Xiaoping Cui
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  4. Tingting Liu
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  5. Zhe Liu
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  6. Kun Wang
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Correspondence to Guangming Zhu.

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Wang, Y., Zhu, G., Cui, X. et al. Electroactive shape memory effect of radiation cross-linked SBS/LLDPE composites filled with carbon black. Colloid Polym Sci 292, 2311–2317 (2014). https://doi.org/10.1007/s00396-014-3266-0

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  • DOI: https://doi.org/10.1007/s00396-014-3266-0

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