Preparation of micron-sized PA6/12 copolymer microspheres via successive in-situ polymerization |
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Authors: | Bozhen Wu Lanjie LiTingxiu Xie Guisheng Yang |
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Affiliation: | a Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Joint Laboratory of Polymer Science and Technology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, Chinab Graduate School of the Chinese Academy of Sciences, Beijing 100190, Chinac Shanghai Genius Advanced Materials Co., Ltd., Shanghai 201109, China |
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Abstract: | Micron-sized polyamide 6/12 (PA6/12) copolymer microspheres were firstly synthesized via successive in-situ polymerization of styrene (free radical polymerization), equimolar Laurolactam (LL) and Caprolactam (CL) (anionic ring-opening polymerization). The resulting PA6/12 microspheres were regular sphericity, with diameter ranging from 9.2 to 138.0 microns and narrow size distribution (size distribution ranging from 1.2 to 3.3), as confirmed by scanning electron microscopy (SEM) and Laser diffraction size Analyzer. Furthermore, the study on the PA6/12 microspheres in PA6/12 and PS (PA6/12/PS) blends confirmed that the particle size distribution, diameter of PA6/12 microspheres were controllable, and closely related to the content of PS in the blends, which indicated that the formation of the PA6/12 microspheres in the PA6/12/PS blends can be elucidated via a phase inversion mechanism. |
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Keywords: | Microspheres Electron microscopy Microstructure Phase diagrams Polymers |
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