Effect of Epoxidized and Maleinized Corn Oil on Properties of Polylactic Acid (PLA) and Polyhydroxybutyrate (PHB) Blend

Abstract

The present work analyzes the influence of modified, epoxidized and maleinized corn oil as a plasticizing and/or compatibilizing agent in the PLA–PHB blend (75% PLA and 25% PHB wt.%). The chemical modification processes of corn oil were successfully carried out and different quantities were used, between 0 and 10% wt.%. The different blends obtained were characterized by thermal, mechanical, morphological, and disintegration tests under composting conditions. It was observed that to achieve the same plasticizing effect, less maleinized corn oil (MCO) is needed than epoxidized corn oil (ECO). Both oils improve the ductile properties of the PLA–PHB blend, such as elongation at break and impact absorb energy, however, the strength properties decrease. The ones that show the highest ductility values are those that contain 10% ECO and 5% MCO, improving the elongation of the break of the PLA–PHB blend by more than 400% and by more than 800% for the sample PLA.

Compatibilization of PLA/PBAT blends with epoxidized canola oil for 3D printing applications

“…It has been reported that epoxidized vegetable oils, such as canola oil, soybean oil, and corn oil, exhibit a plasticizing effect on PLA-based blends, facilitating the mobility of PLA chains and resulting in a significant increase in the crystallinity of the PLA phase. 11,17,32 More importantly, epoxidized vegetable oils act as a compatibilizer for PLA and PBAT blends by increasing the interactions between the two phases. Fig.…”

“…For example, poly(lactic acid) (PLA; one of the most commonly investigated rigid biopolyesters) has been combined with several different elastomeric biopolyesters such as medium-chain-length poly(hydroxyl alkanoates) (PHAs), polycaprolactone (PCL), poly(butylene adipate-co-terephthalate) (PBAT), and polybutylene succinate (PBS) to enhance blend ductility and toughness. 7,[10][11][12] Among the wide range of elastomeric biopolymer candidates for impact modification, PBAT offers the highest elongation at break (up to 700%) at a reasonable cost. 13,14 It's worth noting that although PBAT is a petroleum-derived copolymer, it is completely biodegradable; it is manufactured using cheap and commercially available monomers, allowing for scalable production.…”

Preparation and Characterization of Epoxy Soybean Oil Modified Polylactic acid Reinforced with Straw Fibers

“…4, the PLA tensile strength was low (47.4 MPa), where that of PLA/ESO binary composites initially grew and subsequently declined as the ESO content rose. In contrast to pure PLA, the tensile strength raised by 29% at 1% addition [6, 7,9,15,18,19,27,28,29]. The PLA tensile strength declined as ESO addition exceeded 4%.…”

Effect of LNR-g-MMA on the Mechanical Properties and Lifetime Estimation of PLA/PP Blends

“…Hence, improving the properties or limitations of general polymers can be undertaken through many methods, such as plasticization, chemical modification, and blending with other polymers, which is the most popular method. The blending of PLA with other tough polymers and thermoplastic elastomeric polymers, such as linear low density polyethylene (LLDPE) [ 6 ], poly(propylene carbonate) (PPC) [ 7 ], epoxidized natural rubber (ENR) [ 8 ], poly(bulylene succinate−butylene terephthalate) (PBST) [ 9 ], polyhydroxybutyrate (PHB) [ 10 ], or polypropylene (PP) [ 2 , 3 , 11 , 12 , 13 , 14 , 15 ], is regarded as a useful and economical way to overcome these limitations. The advantages of polymer blends result in new materials with a wide range of properties at a lower cost and higher efficiency compared to other methods.…”