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Distribution of α-, β-, and γ-Phases in a Multi-flow Injection-molded Hierarchical Structure

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Abstract

In the current work, a custom-made vibration injection molding device that can provide oscillatory pressure was utilized to create an injection-molded hierarchical structure. Growth competition among α, β, and γphases in the injection-molded structure can be studied because of the presence of this hierarchical structure, wherein shish-kebab and spherulite layers were arranged alternately along the thickness direction. The γcrystals only existed in layers subjected to high pressure and shear stress, whereas β crystals formed between the shear layers. The change in trend of the γfraction was similar to that of parent-to-daughter ratio. In addition, this hierarchical and alternating crystal structure can sharply increase the mechanical properties.

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Acknowledgments

We acknowledged the Shanghai Synchrotron Radiation Facility (SSRF) in Shanghai, China for WAXD experiments.

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  1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China

    Da-Shan Mi, Feng-Yi Hou, Man Zhou & Jie Zhang

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  1. Da-Shan Mi
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Correspondence to Jie Zhang.

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Mi, DS., Hou, FY., Zhou, M. et al. Distribution of α-, β-, and γ-Phases in a Multi-flow Injection-molded Hierarchical Structure. Chin J Polym Sci 36, 765–775 (2018). https://doi.org/10.1007/s10118-018-2057-3

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