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Isothermal crystallization kinetics of poly(3-hydroxybutyrate)/layered double (2006).
| Content Provider | CiteSeerX |
|---|---|
| Author | Liao, Chien-Shiun Nanocomposites, Hydroxide Crystallization, Isothermal Wu, Tzong-Ming Poly, Kinetics |
| Abstract | ABSTRACT: Poly(3-hydroxybutyrate) (PHB)/layered double hydroxides (LDHs) nano-composites were prepared by mixing PHB and poly(ethylene glycol) phosphonates (PEOPAs)-modified LDH (PMLDH) in chloroform solution. Both X-ray diffraction data and TEM micrographs of PHB/PMLDH nanocomposites indicate that the PMLDHs are randomly dispersed and exfoliated into the PHB matrix. In this study, the effect of PMLDH on the isothermal crystallization behavior of PHB was investi-gated using a differential scanning calorimeter (DSC) and polarized optical micros-copy. Isothermal crystallization results of PHB/PMLDH nanocomposites show that the addition of 2 wt % PMLDH into PHB induced more heterogeneous nucleation in the crystallization significantly increasing the crystallization rate and reducing their activation energy. By adding more PMLDH into the PHB probably causes more steric hindrance of the diffusion of PHB, reducing the transportation ability of polymer chains during crystallization, thus increasing the activation energy. The correlation among crystallization kinetics, melting behavior and crystalline structure of PHB/ |
| File Format | |
| Publisher Date | 2006-01-01 |
| Access Restriction | Open |
| Content Type | Text |
