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Effect of polyhedral oligomeric silsesquioxane and sorbitol on properties of isotactic polypropylene

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Abstract

Isotactic polypropylene(iPP) was modified by the introduction of polyhedral oligomeric silsesquioxanes(POSS) and 1,3:2,4-bis(3,4-dimethylbenzylidene)sorbitol(DMDBS). Chemical combination of (3-mercapto)-propyl-heptaisobutyl POSS with DMDBS(POSS-DMDBS), and physical mixing of DMDBS with octaisobutyl POSS (iso-POSS/DMDBS) or trisilanolisobutyl POSS(tri-POSS/DMDBS) were applied respectively to modifying iPP, and the effects of POSS and DMDBS on crystallization, rheological and mechanical properties of iPP were systematically investigated. The results indicate that iso-POSS/DMDBS and tri-POSS/DMDBS were more effective than POSS-DMDBS on the improvement of the crystallization behavior of iPP due to the higher crystallization temperature, while the crystallinity of iPP containing POSS-DMDBS was enhanced, approximately approached to that of iPP containing tri-POSS/DMDBS. The tensile strength of iPP with POSS-DMDBS was significantly increased from 34 MPa to 40 MPa, as high as that of iPP with iso-POSS/DMDBS. The different effects caused by the specific interaction between POSS and DMDBS could possibly be applied in the modification of iPP.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300072, P. R. China

    Guanyun Chen, Baixuan Feng, Kongying Zhu, Yunhui Zhao & Xiaoyan Yuan

  2. Analysis and Measurement Center, Tianjin University, Tianjin, 300072, P. R. China

    Kongying Zhu

Authors
  1. Guanyun Chen
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  2. Baixuan Feng
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  3. Kongying Zhu
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  4. Yunhui Zhao
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  5. Xiaoyan Yuan
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Corresponding authors

Correspondence to Kongying Zhu or Xiaoyan Yuan.

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Chen, G., Feng, B., Zhu, K. et al. Effect of polyhedral oligomeric silsesquioxane and sorbitol on properties of isotactic polypropylene. Chem. Res. Chin. Univ. 31, 303–307 (2015). https://doi.org/10.1007/s40242-015-4394-x

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  • DOI: https://doi.org/10.1007/s40242-015-4394-x

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