Effect of a Self-Assembled Nucleating Agent on the Crystallization Behavior and Spherulitic Morphology of Poly(lactic acid)

Impact of aromatic sulfonate derivative on the crystallization, thermal resistance, and hydrolytic properties of poly(lactic acid)

“…Experimental results indicate that the addition of LAK promotes the crystallization of PLA. In order to investigate the crystallization properties, the enthalpy values were obtained by analyzing DSC images in conjunction with the data from Figure 2, as per the formula 38 $$$$ X\mathrm{c}=\frac{\Delta {H}_{\mathrm{c}}}{\Delta {H}_{\mathrm{m}}^0\times {w}_{\mathrm{PLA}}}\times 100\% $$$$ …”

“…The nucleation efficiency (NE) of LAK was evaluated using the following equation 38 : $$$$ \mathrm{NE}\left(\%\right)=\frac{{\mathrm{T}}_{\mathrm{c}}-{\mathrm{T}}_{\mathrm{c}}^{\mathrm{min}}}{{\mathrm{T}}_{\mathrm{c}}^{\mathrm{max}}-{\mathrm{T}}_{\mathrm{c}}^{\mathrm{min}}}\times 100\% $$$$ where T c min was 94.9 °C and T c max was 154.3 °C 38 . The NE of LAK was evaluated and illustrated in Table S1.…”

“…The NE of 1.0 wt% LAK was 34.8%, whereas that of 2.0 wt% LAK was 44.8%. Yan et al 38 reported the NE of decanedioic acid dibenzoylhydrazide (DDBH). The NE of 0.9 wt% DDBH was above 50%, which indicated that the DDBH had high NE.…”

“…The variation of time with respect to the change in relative crystallinity ( X t ), calculated using a formula 38 $$$$ {X}_t=\frac{\triangle {H}_c(t)}{\triangle {H}_c\left(\infty \right)}=\frac{\int_0^t\frac{d{H}_c}{dt} dt}{\int_0^{\infty}\frac{d{H}_c}{dt} dt} $$$$ where $$$ \mathrm{d} $$$ H c /dt is the heat flow rate.…”