Evaluation of environmental degradability based on the number of methylene units in poly(butylene n-alkylenedionate)

Baba, Takuro; Tachibana, Yuya; Suda, Shota; Kasuya, Ken-ichi

doi:10.1016/j.polymdegradstab.2017.02.007

Cited by 19 publications

(14 citation statements)

References 42 publications

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“…Biodegradability of PBSOs. We previously reported that microorganisms readily mineralized all the hydrolysates of PBS 48 and PBO, 30 namely, SA, BD, and oxabicyclic diacid. Therefore, P(BS-co-BO)s may also be biodegradable and hydrolyzed by the extracellular enzymes produced by the microorganisms.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Synthesis, Physical Properties, and Biodegradability of Biobased Poly(butylene succinate-co-butylene oxabicyclate)

Tachibana

Yamahata

Kimura

et al. 2018

ACS Sustainable Chem. Eng.

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Furfural, a compound easily manufactured from hemicellulose on the global scale, has gained attention as a second-generation biomass resource. The synthesis of oxabicyclodicarboxylic anhydride (OBCA) from furfural alone and its polymerization with diol to form the biobased and biodegradable polyoxabicyclate (POBC) make OBCA a novel biobased monomer building block. To control the physical properties of POBC, we synthesized a copolyester of butanediol (BD), succinic anhydride (SAh), and OBCA. The structures of the resultant poly(butylene succinate-co-butylene oxabicyclate) (P(BS-co-BO)) polymers were studied using 1H and 13C NMR spectrometry, size-exclusion chromatography, thermal gravimetric analysis, differential scanning calorimetry, and wide-angle X-ray diffraction analysis. Physical properties of the melt-pressed films were examined by tensile strength testing, and the hydrolyzability of P(BS-co-BO)s was evaluated using a clear zone formation method with bacteria. To examine the environmental biodegradability of P(BS-co-BO), the biochemical oxygen demand for degrading their constituents was measured using the mixed inoculum method.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Synthesis, Physical Properties, and Biodegradability of Biobased Poly(butylene succinate-co-butylene oxabicyclate)

Tachibana

Yamahata

Kimura

et al. 2018

ACS Sustainable Chem. Eng.

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“…However, systematic studies on the effects of polymer-and soil-specific factors on microbial utilization remain sparse. 52,143 One of these studies demonstrated that polymer utilization in 19 field soils increased with increasing soil nitrogen contents and with increases in the cumulative time period over which temperatures at the field sites were above 10 °C. 52 Additional difficulties in the interpretation of mineralization curves arise because the nonmineralized fraction remaining in soils typically remains uncharacterized.…”

Section: ■ Steps Involved In Mulch Filmmentioning

confidence: 99%

Biodegradation of Polymeric Mulch Films in Agricultural Soils: Concepts, Knowledge Gaps, and Future Research Directions

Sander

2019

Environ. Sci. Technol.

221

130

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The agricultural use of conventional, polyethylene-based mulch films leads to the accumulation of remnant film pieces in agricultural soils with negative impacts for soil productivity and ecology. A viable strategy to overcome this accumulation is to replace conventional with biodegradable mulch films composed of polymers designed to be degraded by soil microorganisms. However, understanding polymer biodegradation in soils remains a significant challenge due to its dependence on polymer properties, soil characteristics, and prevailing environmental conditions. This perspective aims to advance our understanding of the three fundamental steps underlying biodegradation of mulch films in agricultural soils: colonization of the polymer film surfaces by soil microorganisms, depolymerization of the polymer films by extracellular microbial hydrolases, and subsequent microbial assimilation and utilization of the hydrolysis products for energy production and biomass formation. The perspective synthesizes the current conceptual understanding of these steps and highlights existing knowledge gaps. The discussion addresses future research and analytical advancements required to overcome the knowledge gaps and to identify the key polymer properties and soil characteristics governing mulch film biodegradation in agricultural soils.

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“…Long-chain polyesters with various structures have been synthesized via a variety of polymerization methods, including not only traditional polycondensation of long-chain hydroxyl acids − or diol-diacid monomer pairs ,− and ring opening polymerization of macrocyclic lactones − but also (ring opening) metathesis (co)polymerization of ester-containing noncyclic dienes or cyclenes followed by hydrogenation , and carbonylation polymerization . The combination of metathesis copolymerization and hydrogenation is very useful in synthesizing long-chain polyesters with very low ester bond fraction and therefore T m very close to high density polyethylene (HDPE). , Thermal, mechanical as well as biodegradability, ,− and gas barrier properties of some long-chain polyesters have also been reported.…”

Section: Introductionmentioning

confidence: 99%

Potentially Biodegradable “Short-Long” Type Diol-Diacid Polyesters with Superior Crystallizability, Tensile Modulus, and Water Vapor Barrier

Zhou

Qin

et al. 2021

ACS Sustainable Chem. Eng.

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Long-chain aliphatic polyesters are potential biodegradable polymers having PE-like structure and properties. To develop biodegradable long-chain polyesters for practical applications, a series of “short-long” type long-chain polyesters, PEsxy (x = 2–4, 6, y = 10–16), are designed and synthesized from C2–4,6 short-chain α,ω-diols and C10–16 long-chain α,ω-diacids via melt polycondensation. They showed intrinsic viscosity as high as 0.93–1.64 dL/g and PE-like crystal structure, rapid crystallization, and ductile tensile behavior. Their crystallization and melting temperature showed an increasing trend with diacid chain length and a clear odd–even effect. The highest melting temperature reached 94 °C, and the highest tensile strength reached 53 MPa. Chain length-dependent biodegradability in soil and hydrolytic degradation under neutral conditions at 30–60 °C was also observed. In comparison with the widely used biodegradable poly(butylene adipate-co-terephthalatae) (PBAT) copolyester, these polyesters show comparable tensile strength, ductility, and oxygen barrier performance, but obviously superior and desirable crystallizability, tensile modulus, and water vapor barrier performance.

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Evaluation of environmental degradability based on the number of methylene units in poly(butylene n-alkylenedionate)

Cited by 19 publications

References 42 publications

Synthesis, Physical Properties, and Biodegradability of Biobased Poly(butylene succinate-co-butylene oxabicyclate)

Synthesis, Physical Properties, and Biodegradability of Biobased Poly(butylene succinate-co-butylene oxabicyclate)

Biodegradation of Polymeric Mulch Films in Agricultural Soils: Concepts, Knowledge Gaps, and Future Research Directions

Potentially Biodegradable “Short-Long” Type Diol-Diacid Polyesters with Superior Crystallizability, Tensile Modulus, and Water Vapor Barrier

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