Abstract
AbstractThe nonisothermal crystallization of low‐density polyethylene inside percolating network of ZnO nanoparticles (LDPE/60 vol % ZnO) was investigated via differential scanning calorimetry (DSC), and compared to that of LDPE bulk (pristine LDPE and LDPE/1.15 vol % ZnO). The results revealed that crystallization behavior of LDPE inside ZnO percolating network was quite different from that of LDPE bulk. The former showed ∼ 4°C higher crystallization onset temperatures contrasting to the latter, demonstrating nucleation effect of ZnO on LDPE crystallization. On the other hand, much longer half‐crystallization times were observed for the former, illustrating that crystallization of LDPE is retarded by the continuous ZnO network to some extent. Moreover, LDPE embedded inside ZnO network has by far larger crystallization activation energy and smaller specific free energy of the folding surface in contrast to LDPE bulk. Finally, nonisothermal crystallization kinetics study illustrated that both modified Avrami and Liu methods could be used to describe satisfactorily nonisothermal crystallization kinetics for all the samples investigated. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
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