Edible films and coatings gained renewed interest in the food packaging sector with polysaccharide protein blending being explored as a promising strategy to improve properties of edible films. The present work studies composite different proportions pectin (P), alginate (A) whey Protein concentrate (WP) formulated simplex centroid mixture design evaluated for physico-chemical characteristics understand effects individual components on final film performance. studied matrices exhibited good...

In the present paper, four fully biobased homopolyesters of 2,5-furandicarboxylic acid (2,5-FDCA) with a high molecular weight have been successfully synthesized by two-stage melt polycondensation, starting from dimethyl ester 2,5-FDCA and glycols different lengths (the number methylene groups ranged 3 to 6). The polyesters first subjected an accurate characterization NMR gel-permeation chromatography. Afterward, samples processed into free-standing thin films (thickness comprised between...

Both academia and industry are currently devoting many efforts to develop high gas barrier bioplastics as substitutes of traditional fossil-based polymers. In this view, contribution presents a new biobased aromatic polyester, i.e., poly(propylene 2,5-thiophenedicarboxylate) (PPTF), which has been compared with the furan-based counterpart (PPF). biopolyesters have characterized from molecular, thermo-mechanical structural points view. Gas permeability behavior evaluated respect 100% oxygen,...

Copolymers of poly(butylene succinate) (PBS) containing diethylene succinate sequences (PBSPDGS) with different molecular architectures were prepared via reactive blending in the presence a Ti-based catalyst. In particular, block copolymer long and random one very short synthesized, characterized investigated terms enzymatic biodegradability. For comparison, parent homopolymer PBS has been also by usual two-stage melt polycondensation. Preliminary biodegradation tests based on highly...

Among the various factors that contribute to transition from a linear circular economy, identification of superpolymers with outstanding mechanical as well barrier properties and zero environmental impact has become mandatory issue. Such new supermaterials render recycling concrete option for efficient ecofriendly management plastic wastes. In this study, 100% biobased polyester been prepared by one-pot solvent-free synthesis, starting 2,5-furandicarboxylic acid 1,5-pentanediol. At first,...

In the last decade, there has been an increased interest from food packaging industry toward development and application of biodegradable biobased plastics, to contribute sustainable economy reduce huge environmental problem afflicting planet. this framework, present paper describes synthesis novel PBS (poly(butylene succinate))-based random copolymers with different composition containing glycol sub-units characterized by alkyl pendant groups length. The prepared samples were subjected...

Enzymatic hydrolysis of poly(1,4-butylene 2,5-thiophenedicarboxylate) (PBTF) and 2,5-furandicarboxylate) (PBF) by Humicola insolens (HiC) Thermobifida cellulosilytica (Cut) cutinases is investigated. For the first time, different depolymerization mechanisms PBTF (endo-wise scission) PBF (exo-wise cleavage) has been unveiled correlated to chemical structure two polyesters.

High-molecular-weight poly(butylene 2,4-furanoate) (2,4-PBF), an isomer of well-known 2,5-furanoate) (2,5-PBF), was synthesized through eco-friendly solvent-free polycondensation process and processed in the form amorphous film by compression molding. Molecular characterization carried out NMR spectroscopy GPC analysis, confirming chemical structure high polymerization degree. Thermal analyses evidenced a reduction both glass-to-rubber transition melting temperatures, as well detriment...

Here, solution-cast blends of polylactic acid (PLA) and a novel bioderived poly(pentamethylene 2,5-furanoate) (PPeF) in variable concentrations (1–50 wt %) are prepared investigated. The characterization the thin films (thickness 50 μm) highlights that PPeF strongly improves UV-shielding properties PLA, with decrease transmittance at 275 nm from 47.3% neat PLA to 0.77% only 1 % PPeF, while visible region these fractions is marginal, allowing production optically transparent films. Despite...

In the last years, exponential growth in demand of petroleum-based plastic materials, besides extreme exploitation nonrenewable resources, lead to mismanagement their disposal and serious ecological issues related dispersion environment. Among possible practical solutions, design biobased biodegradable polymers represents one most innovative challenges. such a context, eco-design an aromatic–aliphatic multiblock copolymer based on poly(lactic acid) containing 2,5-furandicarboxylic acid was...

The crystal structure analysis of a cycloaliphatic polyester, poly(butylene-trans-1,4-cyclohexane dicarboxylate) (PBCE), is performed by X-ray fiber diffraction. Depending on the cooling condition, two forms are identified (α and β). α form obtained slow from melt, while β generated during fast cooling. has triclinic unit cell with P1̅ space group, parameters = 5.46 Å, b 6.89 c 13.51 138.37°, 109.42°, γ 63.30°. One PBCE chain located in chair conformation aliphatic rings...

Dielectric spectra of the polyester poly(propylene succinate) were measured upon crystallization. For this model aliphatic $\ensuremath{\alpha}$ and $\ensuremath{\beta}$ relaxations appear simultaneously are well resolved in experimental frequency window. During isothermal crystallization, fact allows one to use relaxation characterize crystalline structural development while provides information about evolution amorphous phase dynamics. In way structure dynamics can be characterized by a...

This work presents an experimental study on the interplay between structure and dynamics during isothermal nonisothermal cold crystallization of poly(trimethylene terephthalate). Simultaneous X-ray scattering dielectric spectroscopy measurements revealed that, crystallization, crystalline lamellae tend to be homogeneously distributed along sample. A significant amount rigid amorphous phase is formed its location assigned crystal−amorphous interface. The formation less effective for...

The successful development of ferroelectric polymer devices depends on the effective fabrication polar crystalline nanostructures. We demonstrate, by scanning X-ray microdiffraction using synchrotron light, heterogeneous character high aspect ratio one-dimensional nanoarrays poly(vinylidene fluoride-co-trifluoroethylene) copolymers supported a residual film. They were prepared melt and solution template wetting, porous anodic aluminum oxide as template. spatial evolution different polymorphs...

The chemical structure-dynamics relationship for poly(trimethylene 2,5-furanoate) and 1,4-cyclohexanedicarboxylate) was investigated via dielectric spectroscopy compared with that of terephthalate) in order to evaluate the impact on subglass dynamics nature ring. Further comparison accomplished neopentyl glycol containing counterparts: poly(neopentyl 1,4-cyclohexanedicarboxylate). Our study reveals a multimodal β process. For more flexible polymers (containing cyclohexane rings) three modes...

Abstract Nanocomposites based on poly(ethylene terephthalate) (PET) and expanded graphite (EG) have been prepared by in situ polymerization. Morphology of the nanocomposites has examined electronic microscopy. The relationship between preparation method, morphology, electrical conductivity was studied. Electronic microscopy images reveal that exhibit well dispersed graphene platelets. incorporation EG to PET results a sharp insulator‐to‐conductor transition with percolation threshold (ϕ c )...

Many efforts are currently devoted to the design and development of high performance bioplastics replace traditional fossil-based polymers. In response, this contribution presents a new biobased aromatic polyester, i.e., poly(butylene 2,5-thiophenedicarboxylate) (PBTF). Here, PBTF is characterized from molecular, thermo-mechanical structural point view. Gas permeability evaluated at different temperatures, in range below above glass transition, providing full insight into performances...