Effect of lignin particles as a nucleating agent on crystallization of poly(3‐hydroxybutyrate)

摘要: The effect of lignin fine powder, as a new kind nucleating agent, on the crystallization process poly(3-hydroxybutyrate) (PHB) was studied. kinetics both isothermal and nonisothermal processes from melt for pure PHB PHB/lignin blend studied by means differential scanning calorimetry. Lig- nin shortened half-time t1/2 crystallization. activation energy E in 237.40 131.22 kJ/mol, respectively, clearly indicating that more favorable than thermodynamic perspective. At same time, according to polarized optical microscopy, rate spherulitic growth increased with addition lignin, which is ascribed reduction surface fold e, is, e 59.2 10 3 41.6 Jm 2 PHB/lignin, respectively. Polarized microscopy also showed spherulites found were smaller size greater number those PHB. wide-angle X-ray diffraction indicated an caused no change crystal structure degree crystallinity. These results good agent © 2004