Biodegradability assessment of aliphatic polyesters‐based blends using standard methods

Moura, I.; Machado, A. V.; Duarte, F. M.; Nogueira, R.

doi:10.1002/app.32966

Cited by 38 publications

(18 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To overcome these limitations, partially degradable polymers have been developed with a negotiation between cost and performance [20][21][22]. Therefore, the investigations concerning the total or partial substitution of synthetic plastics by biodegradable materials have proven to be very useful in solving the problem of plastic waste management to a significant extent [8,14,15,[23][24][25][26][27].…”

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

View full text Add to dashboard Cite

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

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

View full text Add to dashboard Cite

show abstract

“…From last two decades, an increase in the investigations concerning total or partial substitution of synthetic plastics by biodegradable materials, viz. poly( L ‐lactic acid) (PLLA) and polycaprolactone (PCL) has been noticed and also, proven to be very useful in solving the problem(s) of plastic waste management to a considerable extent .…”

Section: Introductionmentioning

confidence: 99%

Blends of high density polyethylene and poly(l‐lactic acid): Mechanical and thermal properties

Madhu

Bhunia

Bajpai

2013

Polymer Engineering & Sci

View full text Add to dashboard Cite

The blends of high‐density polyethylene (HDPE) and poly(l‐lactic acid) (PLLA) were prepared by melt blending method in an extrusion mixer with a postextrusion blown film attachment. The ratios of HDPE/PLLA blends were taken as 100/0, 95/5, 90/10, 85/15, and 80/20. The 80/20 blend was further compatibilized by adding maleic anhydride‐grafted polyethylene in different ratios (up to 8 wt%). Based on the mechanical properties of the films, the compositions HDPE80 (80% HDPE and 20% PLLA) and HD80C4 (80% HDPE, 20% PLLA, and 4% compatibilizer) were found to be optimum and considered for further analysis. The thermal properties of these selected blends were investigated by means of thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). TGA study revealed that the addition of the PLLA somewhat decreased the thermal stability of HDPE. DSC investigation showed that the blends were partially miscible only. X‐ray diffraction (XRD) analysis enlightened that the crystallinity of blends was slightly increased with addition of PLLA. Immiscibility of the two polymers was diminished in the presence of compatibilizer, as indicated by the scanning electron microscopy (SEM) of the blends. These partially biodegradable blends may be used for flexible packaging applications. POLYM. ENG. SCI., 54:2155–2160, 2014. © 2013 Society of Plastics Engineers

show abstract

“…Biodegradable polymers and bio‐based materials have begun to be investigated as alternative products to substitute for nondegradable conventional polymers in packaging and biomedical applications. Aliphatic polyesters are widely used in biomedical and pharmaceutical applications and other fields as the most commonly used biodegradable and environment friendly materials . Glycerol is one of the top 10 renewable building blocks, being mostly used in the food industry or as biomedical applications of glycols at low cost .…”

Section: Introductionmentioning

confidence: 99%

Functionalized polyesters derived from glycerol: Selective polycondensation methods toward glycerol‐based polyesters by different catalysts

Zeng

Yang

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

Convergence of biodegradability and functionality is a major direction of new generation bio-based materials. Functionalized aliphatic polyesters based on glycerol are synthesized by solvent-free polycondensation directly. The aim is to prepare linear polyesters with pendant hydroxyl groups along the polymer backbone. The performance of the sustainable biocatalyst Novozyme-435 (an immobilized form of Candida antarctica lipase B) and the metal-based catalyst scandium trifluoromethanesulfonate (also known as scandium triflate) were compared with three organobase catalysts: 1,5,7-triazabicyclo[4,4,0]dec-5-ene, diphenyl hydrogen phosphate, and bis(1,1,2,2,3,3,4,4,4-nonafluoro-1-butanesulfonyl)imide. For the five catalytic systems, the efficiency and selectivity for the incorporation of glycerol were studied, mainly using 1 H NMR spectroscopies, whereas side reactions, such as different macromolecular architecture of different glyceride groups in polymers, were evaluated using 13 C NMR. Especially, the biocatalyst Novozyme-435 succeeded in incorporating glycerol in a selective way with a low reaction temperature, leading to close-to-linear polyesters. By using a renewable hydroxyl-reactive based on polyesters derived from glycerol, it provides a theoretical reference for the synthesis of functional bio-based materials.

show abstract

Biodegradability assessment of aliphatic polyesters‐based blends using standard methods

Cited by 38 publications

References 36 publications

Mechanical and morphological properties of high density polyethylene and polylactide blends

Mechanical and morphological properties of high density polyethylene and polylactide blends

Blends of high density polyethylene and poly(l‐lactic acid): Mechanical and thermal properties

Functionalized polyesters derived from glycerol: Selective polycondensation methods toward glycerol‐based polyesters by different catalysts

Contact Info

Product

Resources

About