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The Crystallization Behavior Regulating Nature of Hydrogen Bonds Interaction on Polyamide 6,6 by Poly(vinyl pyrrolidone)

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Abstract

The crystallization behavior of polyamide 6,6 (PA66) under complex flow field is of great importance for its final mechanical properties. Poly(vinyl pyrrolidone) (PVP) was applied as crystallization modifying agency to improve processability of PA66. The regulation nature on hydrogen bonds (H-bonds) interaction of PVP was studied upon cooling process. As revealed by in situ FTIR, the sample with 5 wt% PVP displays decreased enthalpy change (ΔH) for both the generation of H-bonds and the transition of H-bonds from “disordered” to “ordered” state, which illustrates the molecular mechanism for the regulation of crystallzation behavior. Moveover, 2D-WAXD is applied to reveal the evolution of microstructure for sample under external injection field. Hermans orientation factor (fH) decreases obviously with the addition of PVP, because the relaxation of chain segments is promoted as well the crystallization is retarded. The above crystallization and microstructure changes during the processing provokes the improvement of processability without the apparent sacrifice of mechanical properties.

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Acknowledgments

This work was financially supported by the materials project (No.104).

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Authors and Affiliations

  1. National-certified Enterprise Technology Center, Kingfa Science and Technology Co., LTD., Guangzhou, 510663, China

    Yang Liu, Li Peng, Jie-Long Lin, Charles C. Han & Xian-Bo Huang

  2. CAS Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Yang Liu, Yong Zhou, Du-Jin Wang & Xia Dong

  3. University of Chinese Academy of Sciences, Beijing, 100049, China

    Du-Jin Wang & Xia Dong

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  1. Yang Liu
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  2. Li Peng
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Correspondence to Xian-Bo Huang or Xia Dong.

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10118_2022_2852_MOESM1_ESM.pdf

The Crystallization Behavior Regulating Nature of Hydrogen Bonds Interaction on Polyamide 6,6 by Poly(vinyl pyrrolidone)

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Liu, Y., Peng, L., Lin, JL. et al. The Crystallization Behavior Regulating Nature of Hydrogen Bonds Interaction on Polyamide 6,6 by Poly(vinyl pyrrolidone). Chin J Polym Sci 41, 394–404 (2023). https://doi.org/10.1007/s10118-022-2852-8

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