Synergistic Effect and Structure–Property of Bio-based 1,6-Hexanediol on Thermal, Mechanical and Degradation Properties of Biopolymers

Siegu, William Mawuko Kodzo; Djouonkep, Lesly Dasilva Wandji; Selabi, Naomie Beolle Songwe; Bonku, Emmanuel Mintah; Cheng, Zhengzai; Gauthier, Mario

doi:10.1007/s10924-022-02666-0

Cited by 5 publications

(6 citation statements)

References 70 publications

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“…This is slightly lower than our synthesized copolyesters, because the polarization and non-linear axis of rotation in furans prevent the ring from flipping. Similarly, the longer C–S–C bond in thiophenes compared to C–O–C contributed to this phenomenon [ 31 , 64 ].…”

Section: Resultsmentioning

confidence: 99%

“…Due to its environmental friendliness and low processing cost, enzymatic degradation has gradually gained popularity as the method of choice for plastic waste recycling. Within this group of thiophene-based polyesters, the hydrolyzable ester bonds and the C–S bonds of thiophenes play an essential role in the ignition process [ 31 ]. This enzymatic degradation follows a two-step process in which extracellular enzymes produce microorganisms (mostly sulfur-loving bacteria) that induce hydrolysis of ester bonds, resulting in the cleavage of the polymer chains into water-soluble hydrolysates such as monomers and oligomers.…”

Section: Resultsmentioning

confidence: 99%

“…Unfortunately, while these polyesters derived from aliphatic monomers possess the advantages of short-lived degradation and barrier properties, their strength and storage modulus remain too low to be commercially viable on a large scale, compared to petrochemicals. Thus, a viable strategy to improve the properties of polymers is to blend them with aromatic compounds, to benefit from the synergistic properties of aliphatic and aromatic polyesters offered by various techniques such as chain customization, co-crystallization, melt blending or co-extrusion, nanotechnology, and surface coating to expand their use [ 30 , 31 , 32 , 33 , 34 ]. The resulting biopolymers are incredibly versatile, due to their blend structures, which overcome the shortcomings raised by conventional single-use plastics, such as low flexibility, thermal stability, gas barrier properties, and biodegradability.…”

Section: Introductionmentioning

confidence: 99%

“…By designing all-in-one materials incorporating these unique material properties, scientists have moved onto two known classes of polyesters with exceptional characteristics, such as thiophene-based biopolymers derived from 2,5-thiophene dicarboxylic acid (TDCA), and furan-based biopolymers derived from 2,5-furandicarboxylic acid (FDCA), both of which have the potential to be 100% renewable. These materials have similar structures and properties to the petrochemical terephthalic acid (TPA), including excellent gas barrier properties, chain conformation, and molecular dynamics [ 31 , 39 ]. Although bio-based routes for the synthesis of TPA have been constantly refined over time, PET is still predominantly produced from fossil sources.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis by Melt-Polymerization of a Novel Series of Bio-Based and Biodegradable Thiophene-Containing Copolyesters with Promising Gas Barrier and High Thermomechanical Properties

et al. 2023

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Volatile global oil prices, owing to the scarcity of fossil resources, have impacted the cost of producing petrochemicals. Therefore, there is a need to seek novel, renewable chemicals from biomass feedstocks that have comparable properties to petrochemicals. In this study, synthesis, thermal and mechanical properties, and degradability studies of a novel series of sustainable thiophene-based copolyesters like poly(hexylene 2,5-thiophenedicarboxylate-co-bis(2-hydroxyethoxybenzene) (PTBxHy) were conducted via a controlled melt polymerization method. Fourier-transform infrared (FTIR) and nuclear magnetic resonance (1H NMR) spectroscopy techniques elucidated the degree of randomness and structural properties of copolyesters. Meanwhile, gel permeation chromatography (GPC) analysis showed a high average molecular weight in the range of 67.4–78.7 × 103 g/mol. The glass transition temperature (Tg) was between 69.4 and 105.5 °C, and the melting point between 173.7 and 194.2 °C. The synthesized polymers outperformed poly(ethylene 2,5-thiophenedicarboxylate) (PETF) and behaved similarly to poly(ethylene terephthalate) (PET). The copolyesters exhibited a high tensile strength of 46.4–70.5 MPa and a toughness of more than 600%, superior to their corresponding homopolyesters. The copolyesters, which ranged from 1,4-bis(2-hydroxyethyl)benzene thiophenedicarboxylate (TBB)-enriched to hexylene thiophenedicarboxylate (THH)-enriched, offered significant control over crystallinity, thermal and mechanical properties. Enzymatic hydrolysis of synthetized polymers using porcine pancreatic lipase (PP-L) over a short period resulted in significant weight losses of 9.6, 11.4, 30.2, and 35 wt%, as observed by scanning electron microscopy (SEM), with perforations visible on all surfaces of the films. Thus, thiophene-based polyesters with cyclic aromatic structures similar to terephthalic acid (TPA) show great promise as PET mimics. At the same time, PP-L appears to be a promising biocatalyst for the degradation of bioplastic waste and its recycling via re-synthesis processes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis by Melt-Polymerization of a Novel Series of Bio-Based and Biodegradable Thiophene-Containing Copolyesters with Promising Gas Barrier and High Thermomechanical Properties

et al. 2023

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“…Seal strength is correlated with MW. Seal strengths values between 0.3 and 1.0 N.mm −1 can be achieved at seal temperatures between 117°C and 140°C, at constant seal time of 1.0 s 135 …”

Section: Polyestersmentioning

confidence: 99%

Seal materials in flexible plastic food packaging: A review

2023

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Flexible packaging has many advantages in the food industry, arising from low weight, formability, multilayer complexity and cost. Heat sealing is a very efficient technique to close flexible food packaging. Currently, many thermoplastic materials are used in seal layers. A seal can be formed when these materials are heated and brought into contact; thereafter, polymer chains diffuse across the seal interface and entangle. Hydrogen bonds, polar and ionic interactions are molecular forces that can come into play, depending on the thermoplastic materials that are used in the seal layer. Bonds between identical polymers, referred to as autohesion, are formed in pouch applications (e.g., horizontal and vertical form-fill-seal packages). In lidding applications, the flexible film is sealed to a rigid cup, tray or bottle, whereby bonds can be formed between non-identical polymers because the materials are often provided by different suppliers. All heat seal technologies imply heating of seal layers but differ in the heating principle. In the food industry and in most scientific seal studies, the seals of mono-and multilayered packaging are mainly formed by conductive heating. Recently, the use of emerging technologies, such as ultrasonic and laser heating, is increasingly described in recent papers. Applied seals are characterized by strength after a specified cooling time. Immediately after heating, this strength is referred to as hot tack. A good seal performance is crucial to guarantee food safety and quality. Besides strength, tightness is important to prevent food degradation, caused by microorganisms and external gases, and to keep aromatic gases inside the package. This review aims to give a literature overview that can support stakeholders in the food industry to improve and optimize the material selection in flexible packaging, in order to obtain seals with desired tightness and strength. Heat seal studies on materials and seal technology of flexible food packaging, such as pouches and lidding films, are considered. Scientific data are categorized from a materials' perspective, based on chemical structure, which is revealed by chemical and thermal analysis. A majority of the seal studies is categorized in a first section on polyolefins as seal layers. The following sections describe the seal functionality of (i) ethylene copolymers, such as ionomers; and (ii) polyesters, such as poly (ethylene terephthalate), pol (lactic acid) and poly (butylene succinate). The role of plasticizers, fillers and other

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Bio-based Copolyesters from p-Hydroxybenzaldehyde: Synthesis, Characterization and Thermo-Mechanical Properties

Wang,

Cheng,

Djouonkep

et al. 2023

JOM

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Synergistic Effect and Structure–Property of Bio-based 1,6-Hexanediol on Thermal, Mechanical and Degradation Properties of Biopolymers

Cited by 5 publications

References 70 publications

Synthesis by Melt-Polymerization of a Novel Series of Bio-Based and Biodegradable Thiophene-Containing Copolyesters with Promising Gas Barrier and High Thermomechanical Properties

Synthesis by Melt-Polymerization of a Novel Series of Bio-Based and Biodegradable Thiophene-Containing Copolyesters with Promising Gas Barrier and High Thermomechanical Properties

Seal materials in flexible plastic food packaging: A review

Bio-based Copolyesters from p-Hydroxybenzaldehyde: Synthesis, Characterization and Thermo-Mechanical Properties

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