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Biodegradable poly( p ‐dioxanone) reinforced and toughened by organo‐modified vermiculite
Author(s) -
Qiu ZhiCheng,
Zhang JingJing,
Zhou Yan,
Song BoYa,
Chang JingJing,
Yang KeKe,
Wang YuZhong
Publication year - 2011
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1606
Subject(s) - materials science , spherulite (polymer physics) , differential scanning calorimetry , nanocomposite , dynamic mechanical analysis , thermal stability , ultimate tensile strength , nanoscopic scale , crystallization , polymerization , transmission electron microscopy , vermiculite , polymer chemistry , composite material , polymer , chemical engineering , nanotechnology , physics , engineering , thermodynamics
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.