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Study on high weld strength of impact propylene copolymer/high density polyethylene laminates

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Abstract

The impact propylene copolymer (IPC) and isotactic polypropylene (iPP) were separately selected to prepare laminates with high density polyethylene (HDPE) by hot press. The peel forces of IPC/HDPE and iPP/HDPE laminates were examined, and it was found that the welded joint strength in IPC/HDPE laminate was dramatically higher than that of iPP/HDPE laminate. According to the special microstructure of IPC, the co-crystallization of the ethylene segments in ethylene-propylene block copolymer (EbP) component of IPC and the PE chain in HDPE was proposed to explain the highstrength welding. The DSC results indicated that there indeed existed some interaction between IPC and HDPE, and the crystallizable PE component in IPC could affect the crystallization of HDPE. The scanning electron microscope (SEM) observations of IPC/HDPE blends demonstrated that HDPE tended to stay with the PE-rich EbP chains to form the dispersed phase, indicating the good miscibility between HDPE and EbP components of IPC. According to the above results, the effect of co-crystallization of the PE components of the IPC and HDPE on the high weld strength of IPC/HDPE laminate was confirmed.

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Authors and Affiliations

  1. Key Laboratory of Macromolecular Synthesis and Functionalization, Ministry of Education, Hangzhou, 310027, China

    Chun-hui Zhang, Rui-fen Chen, Feng Chen, Yong-gang Shangguan  (上官勇刚) & Qiang Zheng  (郑强)

  2. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China

    Chun-hui Zhang, Rui-fen Chen, Feng Chen, Yong-gang Shangguan  (上官勇刚) & Qiang Zheng  (郑强)

  3. Laboratory of Reactions and Process Engineering, Nancy-Université, CNRS-ENSIC-INPL, 1 rue Grandville, BP 20451, 54001, Nancy, France

    Guo-hua Hu

  4. Institut Universitaire de France, Maison des Universités, 103 Boulevard Saint-Michel, 75005, Paris, France

    Guo-hua Hu

Authors
  1. Chun-hui Zhang
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  2. Rui-fen Chen
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  3. Feng Chen
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  4. Yong-gang Shangguan  (上官勇刚)
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  5. Qiang Zheng  (郑强)
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  6. Guo-hua Hu
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Corresponding authors

Correspondence to Yong-gang Shangguan  (上官勇刚) or Qiang Zheng  (郑强).

Additional information

This work was financially supported by the National Basic Research Program of China (No. 2005CB623800), the National Natural Science Foundation of China (No. 50603023) and the Joint Research Fund for Overseas Chinese Young Scholars (No. 50728302).

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Zhang, Ch., Chen, Rf., Chen, F. et al. Study on high weld strength of impact propylene copolymer/high density polyethylene laminates. Chin J Polym Sci 29, 497–505 (2011). https://doi.org/10.1007/s10118-011-1059-1

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  • DOI: https://doi.org/10.1007/s10118-011-1059-1

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