Poly(Lactic Acid)/Polycaprolactone Blends Compatibilized with Block Copolymer

Chavalitpanya, Kamolrat; Phattanarudee, Siriwan

doi:10.1016/j.egypro.2013.06.783

Cited by 88 publications

(64 citation statements)

References 17 publications

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“…Takeshi et al [7] showed an increase of ultimate tensile strain of PLA when PCL was added to this blend system. Kamolrat et al [8] used a block copolymer of poly (ethylene glycol) and poly (propylene glycol) as compatibilizer in PLA/PCL blends. SEM micrographs revealed that the PCL phase was better distributed and more miscible in the PLA matrix.…”

Section: Introductionmentioning

confidence: 99%

Effect of PCL and Compatibility Contents on the Morphology, Crystallization and Mechanical Properties of PLA/PCL Blends

2016

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This study focused on the effect of PCL on crystalline morphology, isothermally crystallization of PLA in PLA/PCL blends using POM on investigation. The blend with Pluronic used as a plasticizer was also studied. The blends were prepared by melt blending in an internal mixer. The contents of PCL incorporated were varied from 0-30 % by weight. The content of Pluronic used in this study was at 2.5, 5 and 7.5 phr. The blends were characterized for their morphology, crystallization and mechanical properties. Melt strength of the blends was also investigated. The morphology of the blends confirmed immiscibility of two polymer phases. Scanning electron microscope (SEM) of PLA/PCL blends indicated larger particle size of PCL dispersed in PLA with the increase of PCL contents. T g of PLA in the blend could not be observed on Differential Scanning Calorimetry (DSC) traces. This was due to the overlapping with T m of PCL. The presence of Pluronic in PLA/PCL blends resulted in T m s shifting to slightly lower temperatures. The crystallinity of PLA was also decreased. The spherulitic growth of PLA in blends was followed by polarized optical microscope using isothermal condition at 141 C. The spherulite structure was found affected by the presence of Pluronic hence effect on crystallization of PLA. Tensile properties of PLA/PCL blend were suffered with PCL content except for elongation at break which seems to be enhanced. It was found that the presence of pluronic in PLA/PCL blend increased ductility of the blends. At Plurunic of 2.5 phr and PCL content of 10-20 % by weight, tensile strength of these blends was increased. This was explained by the fine dispersed PCL particles facilitated orientation of PLA chain after proportional limit and hence increased tensile strength. With higher content both PCL and Pluronic, large PCL particle size was disadvantaged for tensile properties.

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Section: Introductionmentioning

confidence: 99%

Effect of PCL and Compatibility Contents on the Morphology, Crystallization and Mechanical Properties of PLA/PCL Blends

2016

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“…Consequently, the resulting mechanical properties are not those expected. In order to improve the compatibility of PLA and PCL, various strategies such as the addition of a compatibilizer [7,14,15], reactive compatibilization [16,17], copolymerization [18][19][20] and crosslinking [21][22][23][24] of PLA and PCL chains had been investigated in past studies.…”

Section: Introductionmentioning

confidence: 99%

Semi-interpenetrating polymer networks composed of poly(l-lactide) and diisocyanate-bridged 4-arm star-shaped ɛ-caprolactone oligomers

Shibita

Takase

Shibata

2014

Polymer

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“…As was observed in the tensile measurements, there was an effective transfer of stress between the two polymers, leading to an increase in the toughness and elongation at break of the materials. A number of reports have demonstrated that thermodynamic miscibility between PLA and PCL is not possible; therefore, for any improvement in the thermal and mechanical properties of such blended materials to be achieved, the kinetic parameters, such as temperature, speed of mixing, and duration of processing, must be considered.…”

Section: Resultsmentioning

confidence: 99%

“…To date, researchers have used various methods to improve the compatibility of PLA/PCL blends. For instance, Chavalitpanya and Phattanarudee used reactive compatibilization technique to improve the morphology of the polymers while maintaining their biodegradability. Wu et al have used the functionalization technique of reinforcement to achieve interfacial localization of compatibilizer, although at the expense of reduced mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Influence of Boehmite Nanoparticle Loading on the Mechanical, Thermal, and Rheological Properties of Biodegradable Polylactide/Poly(ϵ‐caprolactone) Blends

Agwuncha

Ray

Jayaramudu

et al. 2014

Macro Materials & Eng

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Blends of polylactide (PLA) and poly(ϵ‐caprolactone) (PCL) were melt‐processed with boehmite (BAI) nanoparticles to produce ternary biocomposites with the intent of broadening the potential applications of PLA. The mechanical properties of the prepared composites exhibited remarkable improvement in the elongation‐at‐break of between 60 and 430% for increasing loadings of PCL and BAI in the blends. Furthermore, the melting temperatures of PLA and PCL were observed to shift approximately 2 °C toward each other in the composites, an indication of improved compatibility. This partial compatibility was also observed from the electron microscopy images, which also revealed a good dispersion of PCL in the PLA. The composite with balanced properties was found to be consisting of 70 wt% PLA, 30 wt% PCL, and 4 wt% BAI.

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Poly(Lactic Acid)/Polycaprolactone Blends Compatibilized with Block Copolymer

Cited by 88 publications

References 17 publications

Effect of PCL and Compatibility Contents on the Morphology, Crystallization and Mechanical Properties of PLA/PCL Blends

Effect of PCL and Compatibility Contents on the Morphology, Crystallization and Mechanical Properties of PLA/PCL Blends

Semi-interpenetrating polymer networks composed of poly(l-lactide) and diisocyanate-bridged 4-arm star-shaped ɛ-caprolactone oligomers

Influence of Boehmite Nanoparticle Loading on the Mechanical, Thermal, and Rheological Properties of Biodegradable Polylactide/Poly(ϵ‐caprolactone) Blends

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