Biodegradable poly(p‐dioxanone) reinforced and toughened by organo‐modified vermiculite |
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| Authors: | Zhi‐Cheng Qiu Jing‐Jing Zhang Yan Zhou Bo‐Ya Song Jing‐Jing Chang Ke‐Ke Yang Yu‐Zhong Wang |
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| Institution: | 1. Center for Degradable and Flame‐Retardant Polymeric Materials (ERCEPM‐MoE), College of Chemistry, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610064, China;2. Chemistry and Chemical Engineering Department, Mianyang Normal College, Mianyang 621000, China |
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| Abstract: | Poly(p‐dioxanone) (PPDO)/vermiculite (VMT) nanocomposites with exfoliated structure were prepared successfully by in situ intercalative polymerization of p‐dioxanone (PDO) in the presence of organo‐modified vermiculite (OVMT) with the aid of ultrasonic action. The nano‐structure of the nanocomposites was established using X‐ray diffraction (XRD) analysis and transmission electron microscopy (TEM) observations. The investigation of crystallization behavior by differential scanning calorimetry (DSC) and polarized optical microscopy (POM) proved that exfoliated OVMT platelets acted as a template for spherulite growth. The thermal stability of nanocomposites was enhanced than that of pure PPDO. Dynamic mechanical analysis (DMA) indicated nanoscale OVMT platelets restricted the motion of PPDO segments, which benefitted the increase of storage and loss modulus. The tensile properties showed that nanocomposites were reinforced and toughened significantly by the addition of nanoscale OVMT platelets. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | poly(p‐dioxanone) vermiculite nanocomposite crystallization mechanical properties |
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