Effect of Dicumyl Peroxide on a Poly(lactic acid) (PLA)/Poly(butylene succinate) (PBS)/Functionalized Chitosan-Based Nanobiocomposite for Packaging: A Reactive Extrusion Study

Abstract

Nanobiocomposites with balanced mechanical characteristics are fabricated from poly(lactic acid) (PLA)/poly(butylene succinate) (PBS)blend at a weight ratio of 80/20 in association with varying concentrations of functionalized chitosan ( F CH) through reactive extrusion at a temperature of 185 °C. The combined effect of F CH and dicumyl peroxide (DCP) showed insignificant change in tensile strength with a remarkable increase in % elongation at break (∼45%) values. Addition of DCP also caused increase in the molecular weight ( M w ∼ 22%) of the PLA/PBS/1D F CH nanobiocomposite, which is attributed to the cross-linking/branching effect of F CH on the polymers. The interfacial polymer–filler adhesion is also improved, which is observed from the field-emission scanning electron microscopy images of PLA/PBS/1D F CH. For PLA/PBS/1D F CH, the crystallization rate and nucleation density of PLA are increased because of cross-linked/branched structures are developed, which acted as nucleating sites. Therefore, the present work facilitates a simple extrusion processing with a combination of balanced thermal and mechanical properties, improved hydrophobicity (∼27%), and UV-C-blocking efficiency, which draw the possibility for the utilization of the ecofriendly nanobiocomposite in the packing of UV-sensitive materials on a commercial level.

Morpho-Structural, Thermal and Mechanical Properties of PLA/PHB/Cellulose Biodegradable Nanocomposites Obtained by Compression Molding, Extrusion, and 3D Printing

“…The FTIR−attenuated total reflectance (ATR) technique was used to identify the structural changes resulting from the chemical reactions induced by DCP in PLA/PHB/NC nanocomposites. The representative characteristic peaks of PLA and PHB polymers were noticed in both PLA/PHB blends and nanocomposites (Figure 5a) [7,13,43]. Several structural changes were noticed after cross-linking with DCP.…”

Effect of dicumyl peroxide on biodegradable poly(lactic acid)/functionalized gum arabic based films

“…We can note that on addition of DCP into PLA/ F G based bionanocomposites, value of θ c is significantly increased (~14%) with comparison to PLA. This result implies that the nucleation of polymer bionanocomposite contribute the reduction in polarity of chains 35 . Also, increase in surface roughness assists improvement in hydrophobicity of PLA bionanocomposite films.…”

Biocomposites of PLA and Mango Seed Waste: Potential Material for Food Packaging and a Technological Alternative to Reduce Environmental Impact

“…The material produced presented hydrophobicity and UV‐C blocking property, which categorizes this material as an eco‐friendly biocomposite for packaging UV sensitive materials. [ 38 ] Low‐density polyethylene (LDPE), PLA, and polycaprolactone, filled with lemon extract, thymol, and lysozyme, were produced by melting extrusion. Some antimicrobials incorporated into PLA and LDPE showed slight antimicrobial activity because the material was dried and kept frozen, but they were also affected by the high processing temperature.…”