Monitoring biodegradation of poly(butylene sebacate) by Gel Permeation Chromatography, 1H-NMR and 31P-NMR techniques

Siotto, Michela; Zoia, Luca; Tosin, Maurizio; Innocenti, Francesco Degli; Orlandi, Marco; Mezzanotte, Valeria

doi:10.1016/j.jenvman.2012.11.043

Cited by 24 publications

(15 citation statements)

References 23 publications

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“…Similar type of molecular weight lowering was observed on soil composting of poly(butylene sebacate) 68. The value of D remains, however, constant.…”

supporting

confidence: 74%

“…Thus, the M w value variation for the composite M-40 is more drastic as the apparent M w value for PBAT in this case after 4 months is 18.64 kg/mol.The results imply that cellulosic filler enhances the degradability of the polymer which is consistent also with the results from the microscopic studies; the higher amount of filler being more favorable for the molecular weight reduction. Similar type of molecular weight lowering was observed on soil composting of poly(butylene sebacate) 68.…”

supporting

confidence: 74%

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Compostable composites of wheat stalk micro‐ and nanocrystalline cellulose and poly(butylene adipate‐co‐terephthalate): Surface properties and degradation behavior

Giri

Lach

Grellmann

et al. 2019

J of Applied Polymer Sci

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An agricultural waste, the wheat stalk, was used for the extraction of microcrystalline cellulose (MCC) and nanocrystalline cellulose (NCC) via a series of thermochemical and mechanical treatments. The MCC and NCC were then compounded with the biodegradable polymer, poly(butylene adipate-co-terephthalate), PBAT, by melt mixing. The properties of the composites were evaluated by soil composting, contact angle and water absorption measurements, scanning electron microscopy (SEM) and gel permeation chromatography (GPC). The cellulosic filler was found, as per SEM results, to uniformly disperse in the polymer matrix forming a quite homogeneous composite which visibly degraded completely within a few months under soil composting and showed high water absorption, these properties being enhanced with the filler content. Compared to the neat PBAT, the composites showed enhanced surface hydrophilicity thereby increasing the ability of degradation. In spite of seemingly remarkable change in mechanical stability of the polymers under soil burial for several months, relatively low lowering of the molecular weight was observed.

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“…Similar type of molecular weight lowering was observed on soil composting of poly(butylene sebacate) 68. The value of D remains, however, constant.…”

supporting

confidence: 74%

supporting

confidence: 74%

Compostable composites of wheat stalk micro‐ and nanocrystalline cellulose and poly(butylene adipate‐co‐terephthalate): Surface properties and degradation behavior

Giri

Lach

Grellmann

et al. 2019

J of Applied Polymer Sci

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“…31 P NMR analysis allows for an absolute quantification of the groups present in the polymer too. Hydroxyl end groups (0.65 mmol/g) and average molecular weight (corresponding to the M n value estimated from the GPC analysis) were calculated as reported by Siotto et al [29]. The experimental results indicated a polymer average molecular weight of around 3000 g/mol, in reasonable agreement with the average molecular weight of the PEGs mixtures (PEG 4000, 1500 and 600) used for consolidation [1,18].…”

Section: Vasamentioning

confidence: 67%

“…Both these techniques are important tools in lignocellulose characterization [24][25][26][27]. In particular, analytical applications of 31 P NMR have already been reported [28,29] in the study of archaeological unguents and polymer degradation. In addition, a recently developed GPC technique [30] based on the use of ionic liquid as a non-derivatizing solvent for lignocellulosic materials, involving the derivatization of pulverized wood samples with acetyl and benzoyl chloride, was applied.…”

Section: Introductionmentioning

confidence: 99%

Chemical characterization of archaeological wood: Softwood Vasa and hardwood Riksapplet case studies

Zoia¹,

Salanti²,

Orlandi³

2015

Journal of Cultural Heritage

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“…High-density polyethylene (HDPE), low-density polyethylene (LDPE) and polypropylene (PP) are some of those synthetic plastics which are widely used as packaging films (carrier bags), mulching films and for similar other purposes [1]. HDPE contains carbon and hydrogen as backbone elements and has little branching; it also has stronger intermolecular forces and tensile strength than LDPE.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and morphological properties of high density polyethylene and polylactide blends

Madhu

Bhunia

Bajpai

et al. 2014

Journal of Polymer Engineering

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Polyblend films were prepared from high-density polyethylene (HDPE) and poly(l-lactic acid) (PLLA) up to 20% PLLA by the melt blending method in an extrusion mixer with post-extrusion blown film attachment. The 80/20 (HDPE/PLLA) blend was compatibilized with maleic anhydride grafted polyethylene (PE-g-MA) in varying ratios [up to 8 parts per hundred of resin (phr)]. Tensile properties of the films were evaluated to obtain optimized composition for packaging applications of both non-compatibilized and compatibilized blends. The compositions HDPE80 (80% HDPE and 20% PLLA) and HD80C4 (80% HDPE, 20% PLLA and 4 phr compatibilizer) were found to be optimum for packaging applications. However, better tensile strength (at yield) and elongation (at break) of 80/20 (HDPE/PLLA) blend were noticed in the presence of PE-g-MA. Further, thermal properties and morphologies of these blends were evaluated. Differential scanning calorimetry (DSC) study revealed that blending does not much affect the crystalline melting point of HDPE and PLLA, but heat of fusion of 80/20 (HDPE/PLLA) blend was decreased as compared to that of neat HDPE. Spectroscopy studies showed evidence of the introduction of some new groups in the blends and gaining compatibility in the presence of PE-g-MA. The compatibilizer influenced the morphology of the blends, as apparent from scanning electron microscopy (SEM) and supported by Fourier transform infrared (FTIR).

show abstract

Monitoring biodegradation of poly(butylene sebacate) by Gel Permeation Chromatography, 1H-NMR and 31P-NMR techniques

Cited by 24 publications

References 23 publications

Compostable composites of wheat stalk micro‐ and nanocrystalline cellulose and poly(butylene adipate‐co‐terephthalate): Surface properties and degradation behavior

Compostable composites of wheat stalk micro‐ and nanocrystalline cellulose and poly(butylene adipate‐co‐terephthalate): Surface properties and degradation behavior

Chemical characterization of archaeological wood: Softwood Vasa and hardwood Riksapplet case studies

Mechanical and morphological properties of high density polyethylene and polylactide blends

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