New blends of ethylene-butyl acrylate copolymers with thermoplastic starch. Characterization and bacterial biodegradation

Morro, A.; Catalina, F.; Corrales, Teresa; Pablos, Jesús L.; Marı́n, Irma; Abrusci, C.

doi:10.1016/j.carbpol.2016.04.075

Cited by 19 publications

(10 citation statements)

References 35 publications

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“…Miscible blends are known to display a single Tg located at temperatures intermediate between those of neat blend partners, while immiscible systems show two welldefined Tgs. [33][34][35][36] As shown in Fig. 2c and 2d, both blend constituents are semicrystalline, with a second order transition corresponding to the Tg followed by melting of crystalline domains at higher temperatures (see wide angle X-ray diffraction patterns, Fig.…”

Section: Thermal Propertiesmentioning

confidence: 90%

Thermal, optical and structural properties of blocks and blends of PLA and P2HEB

et al. 2018

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Biodegradable diblock and triblock copolymers and blends were prepared, consisting of poly(L-lactic acid) and an aromatic/aliphatic polyester mimicking polyethylene phthalate. As poly(2-(2-hydroxyethoxy)benzoate) possesses unique degradability and thermal properties, these novel block copolymers were explored through thermal analysis, UV-Vis spectroscopy, X-ray diffraction and comparative enzymatic and catalytic degradation. Poly(L-lactic acid), the product of ring opening polymerization of L-lactide by an aluminium salen catalyst, was used as a macroinitiator in the ring opening polymerization of 2,3-dihydro-5H-1,4-benzodioxepin-5-one to afford target diblock and triblock copolymers. Copolymerization dramatically improved the thermal and optical properties of poly(2-(2hydroxyethoxy)benzoate), especially in comparison to polymer blends which favored non-interacting phases that worsened properties. The chemical and enzymatic degradation profiles of the copolymers were studied by depolymerizing with the aforementioned aluminium salen catalyst and degrading with proteinase K.

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Section: Thermal Propertiesmentioning

confidence: 90%

Thermal, optical and structural properties of blocks and blends of PLA and P2HEB

et al. 2018

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“…2a). This structure confers them peculiar crystallization and thermal and gas permeability properties, making them ideal for the fabrication of complex plastics with specialized purposes in biomedical, agricultural, and electronic industries (Mahalik and Madras 2005;O'Leary and Paul 2006;Morro et al 2016; Serrano-Aroca 2017) (Table 1).…”

Section: Acrylic Polymers' Chemistry Properties and Applicationsmentioning

confidence: 99%

Current status on the biodegradability of acrylic polymers: microorganisms, enzymes and metabolic pathways involved

Gaytán

Burelo

Loza-Tavera

2021

Appl Microbiol Biotechnol

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Acrylic polymers (AP) are a diverse group of materials with broad applications, frequent use, and increasing demand. Some of the most used AP are polyacrylamide, polyacrylic acid, polymethyl methacrylates, and polyacrylonitrile. Although no information for the production of all AP types is published, data for the most used AP is around 9 MT/year, which gives an idea of the amount of waste that can be generated after products' lifecycles. After its lifecycle ends, the fate of an AP product will depend on its chemical structure, the environmental setting where it was used, and the regulations for plastic waste management existing in the different countries. Even though recycling is the best fate for plastic polymer wastes, few AP can be recycled, and most of them end up in landfills. Because of the pollution crisis the planet is immersed, setting regulations and developing technological strategies for plastic waste management are urgent. In this regard, biotechnological approaches, where microbial activity is involved, could be attractive eco-friendly strategies. This mini-review describes the broad AP diversity, their properties and uses, and the factors affecting their biodegradability, underlining the importance of standardizing biodegradation quantification techniques. We also describe the enzymes and metabolic pathways that microorganisms display to attack AP chemical structure and predict some biochemical reactions that could account for quaternary carbon-containing AP biodegradation. Finally, we analyze strategies to increase AP biodegradability and stress the need for more studies on AP biodegradation and developing stricter legislation for AP use and waste control. Key points• Acrylic polymers (AP) are a diverse and extensively used group of compounds.• The environmental fates and health effects of AP waste are not completely known.• Microorganisms and enzymes involved in AP degradation have been identified.• More biodegradation studies are needed to develop AP biotechnological treatments.

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“…Bio-based plastics have attracted increased interest as a potential solution to the problems created by the intensive use of petroleum-derived plastics [1]. Bio-based polymers, obtained from natural resources, include polylactic acid PLA [2,3], polyhydroxybutyrate PHB [4,5], thermoplastic starch [6,7], cellulose and its derivatives [8]. These materials are broadly studied due to their fundamental characteristics [9]: values of tensile strength and elastic modulus which are similar to those of polymers of synthetic origin [10].…”

Section: Introductionmentioning

confidence: 99%

Rheology, Morphology and Thermal Properties of a PLA/PHB/Clay Blend Nanocomposite: The Influence of Process Parameters

2021

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The effect of process parameters on the final properties of a poly-lactic acid (PLA) and polyhydroxybutyrate (PHB) polymer blend filled with nanoclays was evaluated. To this aim, the nanofilled blend was processed in a co-rotating twin screw extruder, considering three different screw profiles and different values of the screw rotation speed, and the thermal and thermo-mechanical properties of the so-obtained materials were investigated. Furthermore, XRD analyses, SEM observations and rheological characterization were exploited to infer the coupled effect of the process parameters and nanoclay presence on the microstructure of the filled blend. Preliminary thermodynamic calculations allowed predicting the preferential localization of the nanoclay in the interfacial region between the polymeric phases. The relaxation mechanism of the particles of the dispersed phase in nanofilled blend processed, by rheological measurements, is not fully completed due to an interaction between polymer ad filler in the interfacial region with a consequent modification of the blend morphology and, specifically, a development of an enhanced microstructure. Therefore, by varying the screw configuration, particularly the presence of backflow and distribution elements in the screw profile, high shear stresses are induced during the processing able to allow a better interaction between polymers and clay. This finding also occurs in the thermo-mechanical properties of material, as an improvement of storage modulus up to 20% in filled blend processed with a specific screw profile. Otherwise, the microstructure of filled blend processed with different screw speed is similar, according to the other characterizations where no remarkable alterations of materials were detected.

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New blends of ethylene-butyl acrylate copolymers with thermoplastic starch. Characterization and bacterial biodegradation

Cited by 19 publications

References 35 publications

Thermal, optical and structural properties of blocks and blends of PLA and P2HEB

Thermal, optical and structural properties of blocks and blends of PLA and P2HEB

Current status on the biodegradability of acrylic polymers: microorganisms, enzymes and metabolic pathways involved

Rheology, Morphology and Thermal Properties of a PLA/PHB/Clay Blend Nanocomposite: The Influence of Process Parameters

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