Morphologically Special Features of Poly(3-Hydroxybutyrate)/Low-Density Polyethylene Blends

Olkhov, A. A.; Иорданский, А. Л.; Заиков, Г. Е.; Shibryaeva, L. S.; Литвинов, И. А.; Vlasov, S. V.

doi:10.1081/ppt-100101403

Cited by 18 publications

(13 citation statements)

References 11 publications

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“…The structural disorder in the isotropic matrix of PHB was observed in our works recently by WAXS, FTIR spectroscopy, and quartz‐microbalance sorption methods 19–21. Besides, we cannot exclude the leakage of water flux through defect zones formed on the border between two components, as it occurred in the PHB–polyethylene of low density (PELD) blends described in our work 22. The sharp buildup of heterogeneity in the PHB–PVA blend films in a 30–50% wt interval lets one assume an intricate mechanism of water transport including both the proper diffusion and the transport through porous areas formed of structural elements of the blended components.…”

Section: Resultsmentioning

confidence: 99%

“…The greater the difference between the polarity of the blended macromolecules, the harder it is to achieve a scantily miscible blends' production. It is worth pointing out that, with the retention of mechanical properties, as has been shown for a PHB–PELD reinforced blend,22 the heterogeneity or the microphase separation promote the achievement of chemically corrosive degradation and biodegradation or bioerosion. It is on morphological and transport levels that the control of the service properties for novel biodegradable polymer blends can be realized.…”

Section: Discussionmentioning

confidence: 99%

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Water transport, structure features and mechanical behavior of biodegradable PHB/PVA blends

Olkhov

Vlasov

Иорданский

et al. 2003

J of Applied Polymer Sci

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Stochastic programming is a typical method for addressing the uncertainties in capacity expansion planning problem. However, the corresponding deterministic equivalent model is often intractable with considerable number of uncertainty scenarios especially for stochastic integer programming (SIP) based formulations. In this article, a hybrid solution framework consisting of augmented Lagrangian optimization and scenario decomposition algorithm is proposed to solve the SIP problem. The method divides the solution procedure into two phases, where traditional linearization based decomposition strategy and global optimization technique are applied to solve the relaxation problem successively. Using the proposed solution framework, a feasible solution of the original problem can be obtained after the first solution phase whereas the optimal solution is obtained after the second solution phase. The effectiveness of the proposed strategy is verified through a numerical example of two stage stochastic integer program and the capacity expansion planning examples. © 2011 American Institute of Chemical Engineers AIChE J, 2012

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Water transport, structure features and mechanical behavior of biodegradable PHB/PVA blends

Olkhov

Vlasov

Иорданский

et al. 2003

J of Applied Polymer Sci

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“…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%

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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“…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 9,20 . Several studies concerning the properties of LDPE/PHB blends have been performed and described in the literature 12,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] . There is evidence that LDPE/PHB blends are immiscible and form morphological structures with well distinguished phase boundaries between dispersed phase and matrix 12,[21][22][23][24][25][26]32 .…”

Section: Introductionmentioning

confidence: 99%

“…Several studies concerning the properties of LDPE/PHB blends have been performed and described in the literature 12,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] . There is evidence that LDPE/PHB blends are immiscible and form morphological structures with well distinguished phase boundaries between dispersed phase and matrix 12,[21][22][23][24][25][26]32 . According to Pankova et al 26 , the morphological features of these blends demonstrate the self-reinforced matrix where the minor component (PHB) forms the band-like fibrils embedded in the LDPE matrix.…”

Section: Introductionmentioning

confidence: 99%

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 pressed cake (CC) was used as filler for the blends. The mixture design technique was used to evaluate the effect of the components proportion on the materials flexural properties. The results show that superior LDPE flexural properties may be obtained by the addition of PHB or castor oil cake to LDPE. Biodegradation was evaluated burying the samples in simulated soil for different periods of time. The ternary mixtures with higher content of PHB showed more pronounced degradation. Under the experimental conditions studied the LDPE/CC compositions presented no degradation. However, the loss of mass of the LDPE/PHB/CC ternary mixtures was higher than the loss of mass of the corresponding LDPE/PHB binary mixture. This result suggests that the castor oil cake accelerates the degradation of the LDPE/PHB mixtures.

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Morphologically Special Features of Poly(3-Hydroxybutyrate)/Low-Density Polyethylene Blends

Cited by 18 publications

References 11 publications

Water transport, structure features and mechanical behavior of biodegradable PHB/PVA blends

Water transport, structure features and mechanical behavior of biodegradable PHB/PVA blends

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

LDPE/PHB blends filled with castor oil pressed cake

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