Influence of oxidized polyethylene wax (OPW) on the mechanical, thermal, morphological and biodegradation properties of PHB/LDPE blends

Rosa, Derval dos Santos; Gaboardi, F.; Guedes, Cristina das Graças Fassina; Calil, M.R.

doi:10.1007/s10853-007-1701-z

Cited by 14 publications

(21 citation statements)

References 14 publications

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“…In this scenario, numerous studies have been conducted in order to: (1) Enhance the biodegradability of fossil-fuel-based conventional polymers by blending them with biodegradable natural polymers such as starch or cellulose; (2) Mixing with pro-oxidants so that they are more easily degraded; and (3) Isolate and improve microorganisms that can efficiently degrade these polymers [1][2][3][4] . Polyolefins are considered bioinert polymers which mean that they are highly resistant to assimilation by microorganisms such as fungi and bacteria.…”

Section: Introductionmentioning

confidence: 99%

“…This process involved the addition of an auto-oxidant such as corn oil that shortens the degradation period. Further this technology was improved 2,14 . Poly (3-hydroxybutyrate) is aliphatic polyester produced by several microorganisms that presents very good mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, blending of PHB with suitable polymers may offer the opportunity to obtain cheaper products with improved mechanical properties [15][16][17][18][19][20][21] . Besides, blending conventional polyolefins with PHB has been considered an alternative to minimize the disposal problem in landfills and improve the instrinsic britlleness that restricts PHB applications 2,19,22 . According to Felisberti 21 , PHB blends may be considered biodegradable or partially biodegradable on basis of the biodegradation behavior of the combined polymer.…”

Section: Introductionmentioning

confidence: 99%

“…However, it is worthy to mention that for some researchers, the total assimilation of the fragmentary products by the ecosystem is required if the polymers are to be acceptable from the ecological point of view 13,27 . Several studies concerning the properties of LDPE/PHB blends have been performed and described in the literature 2,4,5,[15][16][17][18][28][29][30][31][32][33][34][35][36] . There is evidence that LDPE/PHB blends are immiscible and form morphological structures with well distinguished phase boundaries between dispersed phase and matrix 2,4,5,[15][16][17][18][28][29][30][31][32][33][34][35][36] .…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and morphological properties of LDPE/ PHB blends filled with castor oil pressed cake

Burlein

Rocha

2013

Mat. Res.

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Blends of PHB and LDPE were prepared by melt mixing in a twin screw extruder. Castor oil cake (CC) was used as filler for the blends. The design of experiments (DOE) technique was used to evaluate the effect of the components proportion on the materials properties. The mechanical properties and morphology of the materials were evaluated. The LDPE Young's modulus increases but the other tensile properties and impact resistance deteriorate with the addition of PHB or CC. The tensile strength values of binary mixtures of LDPE lie in the range from 8.9 to 10 MPa. As some commercial grades of LDPE have mechanical strength in this range, it may be inferred that the addition of a certain amount of PHB or CC to LDPE may be considered as a possibility for obtaining LDPE based materials with increased susceptibility to biodegradation. The poor interfacial adhesion between the phases became visible in all samples.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical and morphological properties of LDPE/ PHB blends filled with castor oil pressed cake

Burlein

Rocha

2013

Mat. Res.

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“…Therefore, the addition of PHB to conventional thermoplastics can be used to reduce the huge amount of packaging wastes in landfills [5][6][7][8][9][10][11][12][13] . There are few papers published concerning the biodegradation properties of the LDPE/PHB blends.…”

Section: Introductionmentioning

confidence: 99%

Low Density Polyethylene (LDPE) blends based on Poly(3-Hydroxi-Butyrate) (PHB) and Guar Gum (GG) biodegradable polymers

Rocha

Moraes

2015

Polímeros

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SbstractLDPE blends based on PHB and GG biodegradable polymers were prepared by melt mixing in a twin screw extruder. The mechanical properties of the materials were evaluated. Preliminary information about the biodegradation behavior of the specimens was obtained by visual observation of samples removed from the simulated soil in 90 days. The results indicated that LDPE/PHB blends may be used for designing LDPE based materials with increased susceptibility to degradation, if elongation at break and impact properties are not determinant factors of their performance. LDPE based materials on GG present values of flexural and mechanical strength lower than those of LDPE/PHB blends. LDPE/PHB/GG blends exhibit unsatisfactory properties. Apparently, the effect of addition of GG to LDPE on the biodegradation behavior of LDPE/GG blends was less intense than the effect caused by addition of PHB to the blends. Similar observation has occurred with the partial replacement of GG by PHB in the ternary blends.

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Investigation of the Effect of Reprocessing on Thermal and Mechanical Properties of Polymers and Polymer Nanocomposites

Dananjaya,

Fortichiari,

Perera

et al. 2024

Adv Eng Mater

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This study explored the impact of multiple reprocessing cycles on the thermomechanical properties of polystyrene (PS) and low‐density polyethylene (LDPE), simulated through reprocessing with a twin‐screw extruder. Additionally, it compared the thermal and mechanical properties of graphene nanoplatelets (1% w/w) reinforced polypropylene (PP‐GNP) nanocomposites with PP. The materials undergo seven consecutive extrusion cycles at varying screw speeds (100 and 150 rpm) and temperatures (180 and 200 °C). Increasing the screw speed from 100 to 150 rpm raised LDPE's screw torque by about 40% at the first reprocessing cycle. Processing PS at 200 °C reduced screw torque by ≈20% compared to 180 °C at 1–5 reprocessing cycles. Both torque and power decrease for PP and PP‐GNP with each reprocessing cycle. LDPE's tensile modulus decreases with more cycles at 200 °C, while PS shows no consistent variation. PP's tensile modulus and ultimate tensile strength drop by 24% and 12%, respectively, from the first to the fifth cycle, while PP‐GNP exhibits no consistent variation. Differential scanning calorimetry shows no clear change in LDPE's melting point, but an increase in PP and PP‐GNP's melting points up to the fifth cycle. This research provides crucial insights to advance the recycling of polymers reducing environmental impact.

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Influence of oxidized polyethylene wax (OPW) on the mechanical, thermal, morphological and biodegradation properties of PHB/LDPE blends

Cited by 14 publications

References 14 publications

Mechanical and morphological properties of LDPE/ PHB blends filled with castor oil pressed cake

Mechanical and morphological properties of LDPE/ PHB blends filled with castor oil pressed cake

Low Density Polyethylene (LDPE) blends based on Poly(3-Hydroxi-Butyrate) (PHB) and Guar Gum (GG) biodegradable polymers

Investigation of the Effect of Reprocessing on Thermal and Mechanical Properties of Polymers and Polymer Nanocomposites

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