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Avella, Maurizio; Martuscelli, E.; Raimo, Maria

doi:10.1023/a:1004740522751

Cited by 329 publications

(163 citation statements)

References 31 publications

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“…For these reasons, efforts in compounding PHB are mainly focused on the search of plasticizers and nucleating agents capable of reducing the crystallization process and improving flexibility and elongation in the final product. Figure 3 shows the stress/strain of PHB (H) samples stored at 50% RH for respectively 30 (HC30d) and 60 days (HC60d), and stored at low temperature (HR) (5°C (30)(31)(32)(33)(34)(35). However, pure PHB has had only limited use mainly because of its intrinsic brittleness (presenting low strain at break) and the narrow processing window of this plastic.…”

Section: General Properties Of Polyhydroxyalkanoatesmentioning

confidence: 99%

“…This approach has been investigated extensively [33] because it can effectively improve mechanical properties [34] and lower the melting point, avoiding degradation during processing. However, blends with other biodegradable polymers and composites based on PHB that exclude any synthetic component are also very convenient as industrial materials due to their easier processability and lower cost ( [35,36]). As reported above, the addition of plasticizers is considered as a relatively simple route to modify the thermal and mechanical properties of polymers.…”

Section: General Properties Of Polyhydroxyalkanoatesmentioning

confidence: 99%

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Polyhydroxyalkanoate (PHA): Review of synthesis, characteristics, processing and potential applications in packaging

Bugnicourt¹,

Cinelli²,

Lazzeri³

et al. 2014

Express Polym. Lett.

772

463

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Abstract. Polyhydroxyalkanoates (PHAs) are gaining increasing attention in the biodegradable polymer market due to their promising properties such as high biodegradability in different environments, not just in composting plants, and processing versatility. Indeed among biopolymers, these biogenic polyesters represent a potential sustainable replacement for fossil fuel-based thermoplastics. Most commercially available PHAs are obtained with pure microbial cultures grown on renewable feedstocks (i.e. glucose) under sterile conditions but recent research studies focus on the use of wastes as growth media. PHA can be extracted from the bacteria cell and then formulated and processed by extrusion for production of rigid and flexible plastic suitable not just for the most assessed medical applications but also considered for applications including packaging, moulded goods, paper coatings, non-woven fabrics, adhesives, films and performance additives. The present paper reviews the different classes of PHAs, their main properties, processing aspects, commercially available ones, as well as limitations and related improvements being researched, with specific focus on potential applications of PHAs in packaging.

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Section: General Properties Of Polyhydroxyalkanoatesmentioning

confidence: 99%

Section: General Properties Of Polyhydroxyalkanoatesmentioning

confidence: 99%

Polyhydroxyalkanoate (PHA): Review of synthesis, characteristics, processing and potential applications in packaging

Bugnicourt¹,

Cinelli²,

Lazzeri³

et al. 2014

Express Polym. Lett.

772

463

View full text Add to dashboard Cite

show abstract

“…The aim of blending is to achieve intermediate or even superior properties while preserving the major characteristics of the pure components. PHB has been blended with several other biocompatible and biodegradable polymers, for instance poly(ethylene oxide), poly (L-lactide), poly (L-lactic acid) or poly-!-caprolactone (PCL), in order to improve weak properties [18,19]. PCL in particular, a synthetic semicrystalline polyester also belonging to the category of biocompatible and biodegradable polymers, is considered as an interesting blend component due to the high ductility and thermal resistance.…”

mentioning

confidence: 99%

“…PCL is generally miscible with a wide variety of polymers acting as a plasticizer and leading to a more flexible material by lowering the glass transition temperature (T g ) and the Young's modulus (E). However, PCL is known to be immiscible with PHB when blended mechanically or in solution and thus considered not to improve mechanical properties in case of PHB [18,[20][21][22][23]. Nevertheless, this blend system is highly discussed in literature due to results that are reported on the attempts to improve miscibility leading to increased ductility and also to tailor degradability.…”

mentioning

confidence: 99%

Hollow fibers made from a poly(3-hydroxybutyrate)/poly-ε-caprolactone blend

Hinüber

Häußler²,

Vogel³

et al. 2011

Express Polym. Lett.

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Abstract. Since poly(3-hydroxybutyrate) (PHB) is inherently brittle and possesses poor elastic properties, hollow fibers produced by melt spinning from pure PHB, as described in our earlier study [Macromolecular Materials and Engineering, 2010, 295/6, 585-594], do not meet the required needs regarding the mechanical performance. Besides hardly available PHB copolymers, also blend systems are known to enhance material properties and have thus been considered to be eligible to fabricate flexible or rather pliable hollow fibers based on PHB. Blends of PHB and poly-!-caprolactone (PCL) are promising for the application in tissue engineering due to the inherent biocompatibility and biodegradability. A wide range of PHB/PCL compositions have been prepared by melt extrusion. Thermal and mechanical properties of the obtained specimens were analyzed in order to identify miscibility and degree of dispersion as well as to determine the influence on the overall mechanical performance. Even though these constituents are known to be immiscible, PHB/PCL 70/30 was proven to be an adequate composition. This blend showed a highly increased elongation and was found to be easily processable by melt spinning compared to pure PHB. From this blend well defined dimensionally stable bendable hollow fibers were fabricated.

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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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Cited by 329 publications

References 31 publications

Polyhydroxyalkanoate (PHA): Review of synthesis, characteristics, processing and potential applications in packaging

Polyhydroxyalkanoate (PHA): Review of synthesis, characteristics, processing and potential applications in packaging

Hollow fibers made from a poly(3-hydroxybutyrate)/poly-ε-caprolactone blend

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

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