Robust and high barrier thermoplastic starch – PLA blend films using starch-graft-poly(lactic acid) as a compatibilizer

Abstract

This work reports the design of a single-layer robust and good barrier sustainable films by using graft polymer compatibilizers. A starch-graft-poly (lactic acid) (St-PLA) copolymer was synthesized and its efficacy...

Sustainable natural rubber composites: masterbatch development of epoxidized natural rubber grafted to designed enzymatic polysaccharides

“…In polymer composites, phase images obtained from the tapping mode of atomic force microscopy (AFM) imaging provide a useful way to study filler dispersion and distribution as varying stiffness can be detected. 49 The morphology of NR composites obtained from the tapping mode of AFM imaging is shown in Fig. 11.…”

“…48 Overall, the incorporation of the glucan in the ENR system led to a higher viscosity of the composite, which can be associated with the occupation of the free volume of the ENR matrix succeeded by restriction of the ENR chains movement. 27,49 It was evident that using a catalyst for producing the masterbatch composite positively correlates with the viscosity increase as composites with a catalyst displayed greater viscosity than the samples without a catalyst. This could be attributed to the formation of more irreversible ether bond grafting of the ENR onto the glucan with the assistance of the catalyst.…”

In Situ Reactive Compatibilization of Thermoplastic Starch/Poly(butylene adipate-co-terephthalate) Blends with Robust Water Resistance Performance

“…Biodegradable polymers such as polysaccharides (i.e., starch, − cellulose, and chitin , ), poly­(lactic acid) (PLA), , poly­(butylene adipate-co-terephthalate) (PBAT), , and polyhydroxyalkanoates , have gained attention as a potential solution to the increasing problem of plastic waste. In particular, the development of biodegradable polymers from renewable resources, such as corn starch or plant-based materials, provides a more sustainable alternative to petroleum-based plastics, helping to reduce the reliance on nonrenewable resources. , Recently, blending thermoplastic starch (TPS) with other biodegradable polymers has become an area of interest to overcome the limitation of TPS alone such as poor processability, low mechanical properties, high sensitivity to water, and poor water barrier properties .…”

“…Combining TPS with biodegradable polymers can result in a material with improved performance, preserved biodegradability, and maintained low cost . For example, Trinh et al utilized the “grafting from” technique to grow PLA chains on starch from lactic acid to fabricate starch-g-PLA, which was then blended with a TPS/PLA blend system as a compatibilizer . This led to a 75% improvement in tensile strength and 96% improvement in the oxygen barrier property when 5 wt % of starch-g-PLA was used as a compatibilizer.…”

Recent Progress in Modification and Preparations of the Promising Biodegradable Plastics: Polylactide and Poly(butylene adipate-co-terephthalate)

“…Trinh et al prepared a starch-graft-poly(lactic acid) (St-g-PLA) copolymer through ROP reaction of lactide to deposit PLA oligomer on the starch skeleton and used it as compatibilizer thermoplastic starch (TPS)/PLA blends. Using the St-PLA compatibilizer tremendously improved the elastic modulus, similar to the tensile strength and flexibility of TPS/PLA films, to supplement the limitations of PLA in packaging and other commercial applications (Figure 15) [115]. Silk sericin (SS) is a natural biological macromolecule.…”