Novel biodegradable low‐density polyethylene–poly(lactic acid)–starch ternary blends

Abstract

The ternary powder blends based on low‐density polyethylene (LDPE) and two polymers of natural origin poly(lactic acid) (PLA) and starch are obtained in a rotor disperser under conditions of shear deformations. The dependence of the final powder dispersity on the composition is explored. A comparative analysis of the mechanical properties of the ternary blends with those of the LDPE–PLA and PLA–starch binary blends previously obtained has revealed that the presence of two rigid polymers PLA and starch leads to an increase in the elastic modulus and a decrease in the tensile strength and elongation at break. In the study of the blend biodegradability, it is found that the presence of two polymers of natural origin in the system with a total mass fraction of 60% promotes intensive biodegradation.

Investigating the hydrolytic degradation of PLA/PCL/ZnO nanocomposites by using viscoelastic models

“…Therefore, PLA has wide-ranging utilization in packaging fiber, electronics, and extraordinarily bio-engineering applications due to their properties. [3][4][5][6][7][8][9][10][11][12][13] Nevertheless, low elongational at break and poor impact strength originated from the intrinsic brittleness of PLA restrict its extensive applications. In this regard, the toughening of PLA to achieve promising properties is the only way to overcome this limitation and attained a lot of attentions.…”

A comparative study of the interaction between the dried ink layer and PLA film used for packaging purposes

“…[ 8,9 ] Hence, biodegradable and bio‐based materials, such as polylactide (PLA), starch and cellulose, and paper and board materials [ 10 ] seem to be good alternatives for traditional fossil‐based plastics. [ 11,12 ] Furthermore, also PE–starch–PLA [ 13 ] or PLA–nanofillers blends [ 14,15 ] may be an option for packaging materials. Unfortunately, the biodegradation process of PLA is the subject of intense discussion.…”

Interfacial lubricating effect in phase coarsening of polyethylene/polycaprolactone/polyethylene oxide tri‐continuous polymer blends

“…[ 3 ] Recent works in the literature have revealed the significant potential of ternary polymer mixtures in tailoring the morphology and, consequently, pushing the limits of the final properties of multiphase polymer systems. [ 4,5 ] The third component in these systems can be a solid nanoparticle, [ 6–9 ] a solvent, [ 10,11 ] or another polymer component localized at the interface of the two other phases. [ 12,13 ] Many previous studies have examined phase separation and morphology evolution during the spinodal decomposition of ternary polymer–polymer–solvent systems.…”