The lanolin‐based oil plasticized polylactide: Thermal and chemical characteristics

Abstract

Bio‐based plasticizers are a significant replacement for petrochemical‐based plasticizers because they are from renewable resources. The plasticizing effect of lanolin‐based oil at a different concentration and as an additive on polylactide's thermal and chemical stability (PLA) was investigated. The thermal stability was assessed using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The plasticized PLA samples were also analyzed with a dynamic mechanical analyzer (DMA), X‐ray powder diffraction (powder XRD), and infrared (IR) spectroscopy. The plasticizer modified the thermal stability of the PLA polymer by increasing the cold crystallization temperature (Tcc), as shown by DSC. At the same time, the DMA data indicated a reduction in the dynamic storage modulus and glass transition temperature (Tg) with increased amounts of plasticizer content. The powder X‐ray diffraction patterns showed that the PLA has no polymorphic crystalline transition with the oil plasticizer. The analysis from the results shows the oil additive's potential as a bio‐based plasticizer for PLA However, further performance improvements are required for large‐scale production. From the results obtained, there are enhancements in the thermal and physical properties of the modified PLA, and it is suitable for composite production.

Tri(3‐alkoxyl‐3‐oxopropyl) phosphine oxides derived from PH3 tail gas as a novel phosphorus‐containing plasticizer for polylactide

“…Therefore, the PLA/plasticizer systems melted under a temperature lower than that of the neat PLA. The melting process of the samples showed two endothermic peaks 10,23,39 : the lower melting point of the neat PLA overlapped with its T cc , and only one melting point appeared on its DSC scan. The peak at low temperature was attributed to the melting of the original crystal with thinner lamellar thickness, whereas the main endothermic peak was caused by the melting of perfect crystal after rearrangement 39 .…”

“…The T cc of PLA also varied with the content changes in the plasticizer content 10,19,22 . For example, the T cc of PLA/plasticizer systems decreased from 125.19°C of neat PLA to 100.91°C when 9 wt% of PC4 was added to the pure PLA (Figure 3A).…”

“…The T cc of PLA also varied with the content changes in the plasticizer content. 10,19,22 For example, the T cc of PLA/plasticizer systems decreased from 125.19 C of neat PLA to 100.91 C when 9 wt% of PC4 was added to the pure PLA (Figure 3A). Furthermore, the T cc of the PLA/plasticizer systems decreased to 77.54 C when the PC4 content increased to 23%.…”

“…Therefore, to improve its processing performance, a plasticizer is added to the PLA matrix to enhance the ductility and film-forming ability of PLA. [8][9][10][11][12][13][14] Although many kinds of plasticizers 15 are available in the plastic industry, the plasticizer of PLA should be carefully selected to preserve its virtue of environmental friendliness. Hence, most PLA plasticizers belonged to aliphatic esters or low-molecular-weight aliphatic polyester without any aromatic structure.…”

“…However, the broad application potential of PLA is restricted by its intrinsic brittleness, which renders PLA processing difficult due to a lack of plastic deformation ability. Therefore, to improve its processing performance, a plasticizer is added to the PLA matrix to enhance the ductility and film‐forming ability of PLA 8–14 …”