Effect of partial crosslinking on morphology and properties of the poly(β-hydroxybutyrate)/poly(d,l-lactic acid) blends

Dong, Weifu; Ma, Piming; Wang, Shifeng; Chen, Mingqing; Cai, Xiaoxia; Zhang, Yong

doi:10.1016/j.polymdegradstab.2013.06.033

Cited by 69 publications

(45 citation statements)

References 37 publications

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“…to the decrease in the molecular weight (Erceg et al, 2005). Similar process upon heating was reported by Dong et al (Dong et al, 2013) who studied the melting temperature of PHB/PLA blend.…”

Section: Thermal Properties Of Phb Compositessupporting

confidence: 76%

PHB/Cellulose Fibers Based Materials: Physical, Mechanical and Barrier Properties

Popa

Râpă³

et al. 2015

Agriculture and Agricultural Science Procedia

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In the latest years, researchers have been working to reduce the dependence on petroleum based fuels and products due to the increase in environmental consciousness. This leads to investigate the environmentally friendly sustainable materials in order to replace the existing ones. One of these polymeric materials is poly(3-hydroxybutyrate) (PHB) which is a semi-crystalline, linear polymer belonging to the class of polyhydroxyalkanoates. It is fully biodegradable and biocompatible, and produced from renewable resources. Although having promising properties, PHB is unstable during processing at elevated temperatures causing thermal degradation that reduces its mechanical performance. The purpose of the present study was to develop and characterize new composite materials based on PHB and different percentage of cellulose fibers (from 2% to 10%), in order to improve PHB's physical mechanical behavior. In this respect, a series of physical-mechanical analyses (melt processing, optical properties, differential scanning calorimetry, water vapor permeability, etc.) were performed. The results obtained during this study show the most appropriate composition of the tested mixtures and demonstrate that the polymeric material based on PHB and cellulose fibers have good physical -mechanical characteristics, being suitable for packaging industry.

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Section: Thermal Properties Of Phb Compositessupporting

confidence: 76%

PHB/Cellulose Fibers Based Materials: Physical, Mechanical and Barrier Properties

Popa

Râpă³

et al. 2015

Agriculture and Agricultural Science Procedia

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“…Poor processability, low melt‐strength, and insufficient impact toughness of the fully biobased and biodegradable PHB/PLA blend are corrected after reactive compatibilization with DCP . The compatibility of this reactive blend improved the formation of branching/crosslinking structures at the interface; and improved compatibility between the phases resulted in reduced inclusion PLA domain size.…”

Section: Principle and Mechanism Of In Situ Compatibilization Of Polymentioning

confidence: 99%

Biodegradable compatibilized polymer blends for packaging applications: A literature review

Muthuraj

Misra

Mohanty

2017

J of Applied Polymer Sci

307

183

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The majority of materials used for short-term and disposable packaging application are non-biodegradable which are not satisfying the demands in environmental safety and sustainability. Biodegradable polymers are an alternative for these nonbiodegradable materials. The biodegradable polymeric materials can degrade in a reasonable time period without causing environmental problems. However, biodegradable polymers possess some limitations such as comparatively high cost, insufficient mechanical performances, and inferior thermal stability to extend their widespread application in packaging industry. To overcome these limitations, one of the most commonly used strategies is melt blending of dissimilar biodegradable polymers. Unfortunately, most of the biodegradable polymer blends exhibit insufficient performance because they are thermodynamically immiscible as well as exhibit poor compatibility between the blended components. It has been established that the compatibilization is a well-known strategy to improve the performances of the immiscible biodegradable polymer blends by enhancing the adhesion between the phases. As a result, recent studies focus on various compatibilizers to enhance the performances of the resulting biodegradable polymer blends. This review summarizes the recent developments on a variety of biodegradable polymer blends compatibilized by melt processing with a main focus of ex situ and in situ compatibilization strategies.

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“…On the other hand, the results indicated that during processing at high temperature transesterification mechanism may occur in PLA/PBAT blends, which promotes polymer chains rearrangements to form linear, soluble, similar to mixed PLA-PBAT covalently bound chains. Dong et al [99] proved that using DCP as cross-linking agent caused branching and partial cross-linking in PHB/PLA blends, which significantly enhanced interfacial adhesion between PLA and PHB phases and improved mechanical properties of the PLA/PHB blends. For example, it was found that addition of 0.5 wt% of the DCP to PLA/PHB blend resulting in increased the tensile strength for around 5 MPa and impact toughness by around 30%, comparing to unmodified blend.…”

Section: Aliphatic Polyesters Blendsmentioning

confidence: 99%

Reactive extrusion of bio-based polymer blends and composites – Current trends and future developments

Formela¹,

Zedler²,

Hejna³

et al. 2018

Express Polym. Lett.

112

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Abstract.Reactive extrusion is a cost-effective and environmentally-friendly method to produce new materials with enhanced performance properties. At present, reactive extrusion allows in-situ polymerization, modification/functionalization of polymers or chemical bonding of two (or more) immiscible phases, which can be carried out on commonly used extrusion lines. Although reactive extrusion has been known for many years, its application for processing of bio-based polymer blends and composites is a relatively new direction of scientific research. This work presents a literature review on recent advances in the processing of bio-based polymer blends and composites via reactive extrusion. We described compatibilization mechanisms for different types of biodegradable polymeric materials based on: (i) aliphatic polyesters, (ii) aliphatic polyesters/starch and (iii) aliphatic polyester/natural rubber systems. A special attention was focused on conventional and dynamic cross-linking of bio-based polymer blends and composites as an effective way to prepare new materials with unique properties e.g. biodegradable thermoplastic elastomers or shape-memory materials. Advantages and limitations affecting future trends in development of biodegradable polymer blends and composites reactive extrusion are also discussed.

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Effect of partial crosslinking on morphology and properties of the poly(β-hydroxybutyrate)/poly(d,l-lactic acid) blends

Cited by 69 publications

References 37 publications

PHB/Cellulose Fibers Based Materials: Physical, Mechanical and Barrier Properties

PHB/Cellulose Fibers Based Materials: Physical, Mechanical and Barrier Properties

Biodegradable compatibilized polymer blends for packaging applications: A literature review

Reactive extrusion of bio-based polymer blends and composites – Current trends and future developments

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