Nucleation kinetics of polymer formation on nucleation agent

Preparation and conductive properties of polycaprolactone‐grafted carbon black nanocomposites

“…The crystallization behavior of CB ‐g‐ PCL was studied by DSC as shown in Figure 5(b) and an obvious endothermal peak can be observed at 51°C. As the CB particle do not show any phase transition in the range of testing temperatures, this peak results from melting of PCL, which is also close to the melting point of pure PCL 22…”

Evolution of transient cluster/droplet size distribution in a heterogeneous nucleation process

“…In addition to the widely investigated nucleation rate, the evolution of transient cluster size distribution is also important for nucleation processes. Against this background, Z. Kožíšek et al 24,25 proposed a transient nucleation model to study the nucleation kinetics of different molecules on active sites such as the formation of diamond clusters on Si-substrates, 26 the initial crystallization of polymers, 27 and the transient nucleation of ethanol 28,29 and ethanol-hexanol systems. 30 In this model, the transient attachment/detachment frequencies of single molecules to/from the cluster surface were used to describe the growth/decay of cluster size, and then the evolution of cluster size distribution was obtained without any parameter tting.…”

Nucleation and size distribution of nucleus during induction period of polyethylene crystallization

“…17,26,27 The size of the nucleus and critical nucleus is counted by N j = n j l j and N * = n * l * . e ͑=2.87kT / repeating unit͒ is the interfacial energy between materials and nucleating agent and ͑=7.31ϫ 10 −2 kT / repeating unit͒ is the interfacial energy between materials and its melt.…”

“…17 Other popular methods, for example, optical microscopy ͑OM͒, cannot directly confirm it, 18,19 because the resolution of OM ͑order of 1 m͒ is too large to detect the nanosize nuclei. Kožišek et al 26 sults and developed the model by standard kinetics equations to check feasibility of the experimental data and the analysis. 17 Although the nucleation from the glass was confirmed directly by SAXS, 20 and the temperature dependence of the concentration and size of nuclei was calculated from SAXS analysis, there is an intrinsic difference between the nucleation from the glass and melt.…”