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Preparation of damping structural integration materials via the formation of nanostructure in triblock copolymer modified epoxy resins

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Abstract

Amphiphilic triblock copolymer Poly(ε-caprolactone)-block-polydimethylsiloxane-block-poly(ε-caprolactone) (PCL-b-PDMS-b-PCL, LDL) was synthesized via the ring-opening polymerization of ε-caprolactone in the presence of hydroxyl-terminated polydimethylsiloxane (HTPDMS) and was utilized to modify epoxy. The tensile strength and elongation at break were simultaneously enhanced when the triblock copolymer was incorporated. With increasing the concentration of the triblock copolymer, the damping temperature range (tanδ >0.25) was broadened from 21 °C to 34.5 °C. Meanwhile, the storage modulus of the composites and the values of tanδ had no significant decrease. When the concentration of the triblock copolymer was 20 wt%, the value of KIC attained 1.68 MN/m3/2, which was 1.56 times that of the neat epoxy (1.08 MN/m3/2). Besides, the characterization of hydrophobic and hydrophilic performance indicated that the incorporation of the triblock copolymer made epoxy resins transformed from hydrophilic to hydrophobic. It is expected that damping composites obtained by this method may be used as damping structural integration materials in future.

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Acknowledgments

The authors would like to thank the National Natural Science Foundation of China (51273118), the Science & Technology Pillar Program of Sichuan (2013FZ0006) and the Fundamental Research Funds for the Central Universities of China (2015SCU11008) for financial support, and the Analytical and Testing Center of Sichuan University for providing SEM measurements.

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Authors and Affiliations

  1. The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, China

    Zhengguang Heng, Rui Li, Yang Chen, Huawei Zou & Mei Liang

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  1. Zhengguang Heng
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  2. Rui Li
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  3. Yang Chen
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  4. Huawei Zou
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  5. Mei Liang
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Correspondence to Yang Chen or Huawei Zou.

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Heng, Z., Li, R., Chen, Y. et al. Preparation of damping structural integration materials via the formation of nanostructure in triblock copolymer modified epoxy resins. J Polym Res 23, 128 (2016). https://doi.org/10.1007/s10965-016-1019-0

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