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Preparation of a long-alkyl-chain silane grafted organic montmorillonite and its nanocomposite with SEBS

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Abstract

In this study, a modified montmorillonite (W-H-OMMT) was prepared by intercalating pristine montmorillonite using a phosphorus salt and a subsequent grafting using a long-alkyl-chain silane, and the nanocomposites with poly[styrene–(ethylene-co-butylene)–styrene] (SEBS) were prepared by melt blending. The pristine and the modified MMT were characterized by XRD, FT-IR, XPS and SEM. The morphology of the SEBS nanocomposites was studied using XRD, SEM and TEM, and the results can be correlated well with transparency, color, surface contact angle, rheological behavior, thermal and mechanical properties of the nanocomposites. As compared with pristine and the modified clay, more uniform dispersion and improved compatibility are observed for the W-H-OMMT in the SEBS matrix, resulting in better transparency and more hydrophobic surface for the SEBS/W-H-OMMT nanocomposite. Better thermal stability, a synergetic effect in tensile strength and elongation at break were observed, which can be attributed to well dispersion of the W-H-OMMT, as well as perfect adhesion between the W-H-OMMT and the SEBS matrix from the enhanced molecular interaction between the long-alkyl chain and the SEBS molecules. Compared to pure SEBS, the strength and elongation of SEBS/W-H-OMMT nanocomposite increased by 8.5 and 7.6 %; meanwhile, the water contact angel and the 50 % weight loss temperature increased by 5.3 and 13.1 %, respectively. Appropriate silane grafted organic montmorillonite provided an efficient way for the overall performance improvement of SEBS.

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Acknowledgments

The authors are grateful to the National Natural Science Foundation of China (51403128 and 51373100), and the innovation Project of the Shanghai Municipal Education Commission (15ZZ076).

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Authors and Affiliations

  1. School of Material Science and Technology, University of Shanghai for Science and Technology, Shanghai, 200093, China

    Xiaoyan Li, Xiaoqin Zhou, Ying Li, Shawei Tang, Kai Huang & Xia Wang

  2. Shanghai HIUV New Materials Co., Ltd, Shanghai, 201209, China

    Chenjie Shi

  3. DSM Resolve, P. O. Box 18, 6160 MD, Geleen, The Netherlands

    Jianjun Xu

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  1. Xiaoyan Li
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  2. Xiaoqin Zhou
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  3. Chenjie Shi
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  4. Jianjun Xu
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  5. Ying Li
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  6. Shawei Tang
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  7. Kai Huang
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  8. Xia Wang
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Correspondence to Jianjun Xu or Xia Wang.

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Li, X., Zhou, X., Shi, C. et al. Preparation of a long-alkyl-chain silane grafted organic montmorillonite and its nanocomposite with SEBS. Polym. Bull. 74, 107–120 (2017). https://doi.org/10.1007/s00289-016-1701-8

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  • DOI: https://doi.org/10.1007/s00289-016-1701-8

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