Abstract
Abstract With aim to improve the mechanical and thermal properties of poly (lactic acid) (PLA) melt-blown nonwovens (MBs), polyamide 11 (PA11) was melt blended with PLA at the weight proportions of PLA/PA11 (95/5, 90/10, 85/15, 80/20), and the corresponding PLA/PA11 MBs were also manufactured. The crystallization, thermal and rheological behaviors of PLA/PA11 blends were investigated. PLA/PA11 MBs were also characterized by morphology and mechanical properties. The results indicated that PA11, as globular dispersed phases, formed confined crystals and could improve the thermal stability of PLA matrix. The viscosity of PLA/PA11 blends was slightly increased but the rheological behaviors of “shear-thinning” kept unchanged in comparison with PLA. The average diameter of PLA/PA11 MB fibers was slightly increased, whereas the toughness of PLA/PA11 MBs including the strength and elongation were efficiently enhanced compared with those of PLA MBs.
Highlights
Melt-blown (MB) technology is a simple and industrialized one-step process for producing superfine fibers
The degree of crystallinity (Xc) of PLA in PLA/polyamide 11 (PA11) blends was enhanced from 1.9% to 5.3%, which were higher than that of PLA, suggesting that PA11 could be acted as a nucleating agent and promoted the crystallization of PLA
The Xcs of PA11 in PLA/PA11 blends were regularly increased from 16.9% to 24.6% with the content of PA11 increased, but all were lower than that of neat PA11 (24.8%), which demonstrated that the crystallization behavior of PA11 was inhibited by the PLA matrix
Summary
Melt-blown (MB) technology is a simple and industrialized one-step process for producing superfine fibers (average diameter
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