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Amide-based oligomers for low-viscosity composites of polyamide 66

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Abstract

Melt viscosity control of polyamides is an important issue concerning polymer processing and quality composites which are directly influenced by the melt viscosity in extrusion and injection molding processes. In this work, a series of linear and cyclic PA6 (nylon6), PA46 (nylon46), and PA66 (nylon66)-based amide oligomers consisting of <10 repeat units are prepared. The melt viscosities of the composites of each oligomer in a PA66 matrix are investigated. The linear oligomers have a larger viscosity-decreasing effect than cyclic oligomers containing the same repeat unit. Linear PA6 and PA46-based oligomers show a greater melt viscosity reduction than PA66-based ones, especially in PA6-based linear oligomer (A6-L), which shows a reduction of >30%. This result suggests that proper hydrogen bonding mismatching in the polymer chain network plays an important role for lowering viscosity. A6-L/PA66 composites impregnated with 40 wt% glass fiber show a twofold increase in the melt flow index while maintaining their mechanical strengths.

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Authors and Affiliations

  1. Department of Applied Chemistry, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk, 39177, Korea

    Jaehoon Lee, Wan Gi Seo, Jaehyun Kim & Hyun Min Jung

  2. Advanced Materials Division, Korea Research Institute of Chemical Technology, 19 Sinseongno, Yuseong, Daejeon, 34114, Korea

    Yong Seok Kim & Youngjae Yoo

  3. Department of Chemistry and Biochemistry, Biomolecular Sciences Institute, Florida International University, Miami, USA

    Joong Ho Moon

  4. Woosung Chemical Co., Ltd., 18 Daewondang-gil, Youngcheon, Gyeongbuk, 38906, Korea

    Sang Gu Kim

Authors
  1. Jaehoon Lee
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  2. Wan Gi Seo
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  3. Jaehyun Kim
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  4. Yong Seok Kim
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  5. Youngjae Yoo
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  6. Joong Ho Moon
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  7. Sang Gu Kim
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  8. Hyun Min Jung
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Corresponding author

Correspondence to Hyun Min Jung.

Additional information

Acknowledgments: This work was supported by the Technology Industrial Innovation funded by the Ministry of Trade, Industry & Energy (MI, Korea) (grant number 10050523).

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Lee, J., Seo, W.G., Kim, J. et al. Amide-based oligomers for low-viscosity composites of polyamide 66. Macromol. Res. 25, 1000–1006 (2017). https://doi.org/10.1007/s13233-017-5129-2

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  • DOI: https://doi.org/10.1007/s13233-017-5129-2

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