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 13 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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Biodegradation of PP and PE Blended with PHBV in Soil Samples

Gonçalves

Franchetti

2014

Adv Polym Technol

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This work studied the biodegradation of polyethylene/poly(hydroxybutyrate-co-hydroxyvalerate) (PE/PHBV) and polypropylene/PHBV (PP/PHBV) films, by respirometry in soil, using biometric flasks. Additionally, the characteristics of the soil were measured by pH, moisture, organic matter content, and quantification of microorganisms. The soil analysis showed that the two blends inhibited the soil bacteria activity and stimulated the growth of fungi. The PE/PHBV (80/20) blend is more susceptible to the microbial action in the soil than the PP/PHBV (80/20) blend. The blends showed higher biodegradation in the PHBV amorphous phase, due to consumption of ester groups, leading to rearrangement of the crystalline phase of PHBV fraction. On the basis of quantification of CO 2 , the PE/PHBV (80/20) film showed approximately 7% biodegradation, and the beginning occurred in a period of 60 days. Moreover, the employed methods Fourier transform infrared spectroscopy and X-ray diffraction completed the information obtained by the respirometry method, showing evident changes in the polymer chains structure and crystallinity, respectively. C

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

Cited by 13 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

Biodegradation of PP and PE Blended with PHBV in Soil Samples

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